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Polarimeter Systems with High Dynamic Range

Синонимы. Знаки препинания и стоп-кодоны.
Oct 22, 2013 · Antenna Disassembly Start by disassembling your Conifer antenna.

Remove the 2 or 4 bolts which attach the mounting bracket and the feedhorn to the dish. Three models cover the visible to near-infrared wavelength range.
Optical input must be monochromatic coherent light i.
These polarimeters have a high 70 dB dynamic range, and they provide azimuth and ellipticity accuracies of ±0.
When electrical power is supplied via the USB 2.
Software, available for download on the Software tab, enables measurements from up to five measurement heads to be simultaneously acquired.
For more information, please see the Operation tab.
The measurement head accepts a free-space collimated beam up to Ø3.
Free-space and fiber-coupled configurations are shown at the left and second left, respectively, in the above image.
Accessories from Thorlabs' selection of components can be attached using M&A four 4-40 threaded holes located on the front panel.
The GUI also features an easy-to-use alignment tool to help the user optimally align the input beam, which is critical for ensuring accurate measurements.
In addition, for those interested in measuring the polarization-maintaining PM performance of a PM optical fiber, the software includes an extinction ratio tool with the option to correct this measurement for absolute ellipticity and degree of polarization.
Measurements from up to five different sources, which include physical polarimeters, virtual devices, and saved data loaded from files, can be displayed simultaneously.
The software provides control over sample rates and data averaging preferences.
Long-term measurements are also supported.
These measurements save a range of time-stamped data to a приведу ссылку according to the settings specified during the measurement setup.
Long-term measurements can be acquired while using the software to acquire and manipulate measurements from other devices.
Recalibration Service Recalibration services are available for our PAX1000 series polarimeters.
To order this service, scroll to the bottom of the page and enter the Item and Serial of your device before adding the calibration service to your cart.
A Thorlabs representative will contact you with an RMA number, which you will use to return your device for calibration.
The motor drive speed is 60 Hz.
Operating at this rate requires the polarimeter be powered using the included DS15 external power supply.
Use the included DS15 power supply to operate at higher rates.
Note: All technical specifications are valid at 23 ± 5 °C and 45 ± 15% non-condensing relative humidity.
Front Panel of the PAX1000 Series Polarimeters Callout Description F1 4-40 Tapped Hole, 5.
It does not indicate whether warm-up period has concluded.
Use the included DS15 power supply to operate at higher rates.
Figure 1: Rotating Wave Plate Technique The PAX1000 series polarimeters are based on the rotating quarter-wave plate technique.
The input light must be monochromatic and coherent i.
As shown in Figure 1, the input light is Крыло велосипедное переднее BBB, 700с, RoadProtector, черный, BFD-21F and normally incident on a rotating true zero-order quarter-wave plate.
After the wave plate, the light passes through a fixed linear polarizer and then terminates on a photodiode.
The polarization state of the light output by the quarter-wave plate changes as the wave plate rotates.
The polarizer transmits only the component of light polarized along its transmission axis.
As the rotating wave plate results in a continuously changing polarization state incident on the polarizer, the amplitude of the light transmitted by the polarizer, and incident on the photodiode, is modulated.
The photodiode converts the modulated optical intensity to a modulated photocurrent.
This setup produces photocurrent that has a DC term, a term proportional to twice the rotation frequency of the wave plate, and a phase-shifted term proportional to four times the rotation frequency of the waveplate.
Fourier analysis is used to find the amplitude coefficients of each of these frequency-dependent terms, and then the Stokes parameters 4 calculated from those coefficients.
True Zero-Order Quarter-Wave Plate A wave plate is a birefringent optical element through which light polarized along the fast axis travels at a faster velocity than light polarized along the orthogonal slow axis.
The thickness of a quarter-wave plate transforms linearly polarized light to elliptically polarized light, and vice versa, by creating a phase delay of 90°, plus some integer multiple of 360°, between the two orthogonal polarization components.
Thorlabs uses true zero-order quarter-wave plates in the PAX1000 series polarimeters, as the highly accurate measurements of these polarimeters cannot be achieved with other types of quarter-wave plates.
True zero-order wave plates possess the minimum thickness necessary to produce a phase difference of exactly 90°.
Key characteristics of true zero order wave plates include high retardance accuracies, low temperature dependence, low wavelength dependence, and lower sensitivity to angle of incidence than other wave plates.
Wave plates with greater thicknesses, but which are constructed to share some performance characteristics with true zero order wave plates, are more common.
Examples are and wave plates, which are constructed by cementing two different wave plates into a single assembly.
The fabrication process of the pseudo-zero order and achromatic plates results in a small misalignment error between the component plates' fast and slow axes, which causes unacceptably large errors in the polarization measurements made using the rotating wave plate technique.
The wavelength dependency of the true zero-order wave plates used in the PAX1000 series polarimeters determines the operating range of each model.
This is due to the limited bandwidth of the photodiode.
Pulsed light with a high repetition rate is effectively integrated by the photodiode during the detection process, which results in the generation of a continuous wave CW photocurrent.
For these lower 4 rates, the modulation due to the pulsed nature of the light is not accounted for during the data analysis.
The unexpected term in the measurement data related to the laser pulses may result in errors in the calculated polarization state.
Using the Included Accessories to Enable Fiber-Coupled Input To enable the PAX1000 to accept fiber-based input, screw the SM1M10 lens tube onto the external SM1 threads on the front panel of the module.
Insert the F240FC series fiber collimator into the KAD12F adapter, and tighten the set screws to hold the fiber collimator securely.
Screw this assembly into the open end of the SM1M10 lens tube.
Polarization Measurements using the Software GUI Software with an intuitive and graphical user interface GUI with multiple user-configurable attributes is available for the PAX1000 Series of polarimeters.
Please note that this software is not backwards compatible with previous generations of Thorlabs' polarimeters.
State of Polarization The convention the software, manual, and quick start guide use to describe the polarization state assumes the virtual observer looks into the beam, towards the light source.
Sample Rates Sample Rates depend on both the rotation rate of the quarter-wave plate and the number of rotations over which the data are acquired.
Each half-turn of the waveplate Перфоратор сетевой Makita Дж) a full period of data, which is sufficient for determining the state of polarization.
Acquiring data over multiple half-turns of the waveplate can improve measurement accuracy and noise levels, as the output of the fast Fourier transform FFT data processing step often improves as the number of periods included in the input data set increases.
When the optical signal power is low or significant noise is present on the signal, measurement data quality is improved by reducing Basic Sample Rate, which reduces the rotation rate of the quarter-wave plate, and acquiring data over multiple half-turns.
The software provides the option of selecting whether polarization measurements are calculated using data acquired during one half, one full, or two full rotations of the quarter-wave plate.
Figure 2: Alignment Reading Indicating Optimization is Required Alignment Tool Correct alignment of the input beam is crucial for accurate measurements.
The beam is optimally aligned when it is normally incident on the rotating wave plate and centered in the input aperture.
Centering the beam becomes more important as the beam diameter approaches the 3.
Off-center beams, as well as beams that are продолжить normally incident on the wave plate, scatter from surfaces inside the polarimeter and contribute unwanted components to the optical signal incident on the photodiode.
The resulting artifacts in the photocurrent produce errors in the polarization measurement.
Poorly centered beams may also be clipped by the input aperture.
To assist with the alignment process, Thorlabs has developed an alignment tool.
The alignment tool can be opened through the TOOLS tab on the toolbar, which is described in the following section.
As shown in Figure 2, the tool consists of a scale with red and green regions.
The indicator needle on the scale, and the numerical value readout to the left of the scale, shows the fraction of desired components in the photocurrent.
In Figure 2, the indicator needle is in the red region, which corresponds to an unacceptably poor alignment.
Improving alignment reduces contributions from scattered light, which increases the fraction of desired components in the photocurrent.
The size of the green range is set using the Acceptable Alignment control to the left of the scale.
As a rule, good alignment is achieved when the alignment is better than 98%.
However, the alignment should be optimized as much as possible, as it is in Figure 3.
Figure 5: Measurements from up to five sources, including physical and virtual devices as well as data saved to a file, can be plotted to this view.
Figure 4: Main Screen of the GUI with the Poincaré Sphere and Polarization Ellipse Views Active and Equally Sized Key Features of the Display The GUI, whose main screen is shown in Figure 4, consists of several elements.
Related functions are grouped under the different tabs of the toolbar, visible at the top left of the screen in Figure 4.
Data are displayed in the large area below the toolbar section.
Measurement display windows of interest can be added to this region using the VIEW tab in the toolbar.
These different views can then be organized, and their sizes and other appearance attributes modified, by the user.
The example in Figure 4 shows the Polarization Ellipse and the Poincaré Sphere Views active and sized equally.
Multiple Active Devices The software for the PAX1000 series allows measurements from up to five of any combination of physical devices, virtual devices, and saved files to be simultaneously displayed.
Figure 5 shows measurement data plotted on the Poincaré sphere from four different sources: two physical devices red and blue labelsone virtual device green labeland one measurement loaded from a file fuchsia label.
Connecting a virtual device allows the measurement functionality of the software to be explored in the absence of a physical device.
The virtual device is based on the default settings of the PAX1000IR1.
Polarization Ellipse View The Polarization Ellipse View, which can be seen on left side of Figure 4, shows the polarization ellipse calculated for the measured polarization state inscribed in a circle.
A pull-down menu is used to select which active device to use as the source of the displayed data.
A box in the lower left corner displays measurement parameters.
In addition to the four parameters shown by default orientation of the polarization state, wavelength, total power, and degree of polarizationthe user may choose to additional parameters to display azimuth and ellipticity, or power split ratio and phase difference, or the three normalized Stokes vectors.
Poincaré Sphere View The Poincaré Sphere View is shown on the right side of Figure 4 and in Figure 5.
Measurements from up to five sources, a combination of physical, virtual, and data loaded from a file, can be simultaneously plotted to this view.
Reference markers can be placed on the sphere, either using the mouse for approximate placement or a menu function to precisely define the reference state.
Other menu functions allow the appearance, maximum length, and other attributes of each trace to be defined.
The orientation of and zoom factor applied to the sphere can be specified using a separate menu function.
This customized appearance can be saved, so that it can be recalled later.
The orientation of the sphere can also be controlled using keyboard commands or the mouse, and the sphere can be rotated to bring the most current measurement of a particular device to the front by clicking on the box at the bottom of the view that corresponds to the device.
As memory limitations can result in decreased responsiveness of the GUI when large amounts of data are plotted, a total of 50,000 measurement points can be shown on the Poincaré sphere.
As this total number of data points https://sekretlady.ru/svetodiodniy/svetodiodniy-prozhektor-ar-flb-30w-220v-rgb-ir-pdu-karta-24kn.html divided among the different traces plotted on the sphere, the maximum length of each trace depends on the number of displayed traces.
Figure 7: Four different graphs can be selected in Scope Mode.
To activate a graph of interest, click the corresponding circled arrow located at the very left of the row.
Figure 6: Scope Mode View of the Normalized Stokes Parameters Scope Mode View In the Scope Mode View, the 1000 most recently measured data points for a selected set of polarization parameters are shown plotted to a graph, which is continuously updated as values жмите сюда acquired.
Data logging begins as soon as a device is connected, and it can be restarted by clicking the Clear Data button.
Figure 6 shows a graph of the normalized Stokes parameters computed from a measurement file loaded from memory.
The source of the data is specified using the drop-down menu and is one of the active physical devices, virtual devices, or loaded measurement files.
Different graphs can be selected using the Scope Mode function accessed through the VIEW tab in the toolbar, as shown in Figure 7.
The minimized Polarization Ellipse and 4 Sphere views can be expanded by clicking on the gray tabs at the left of the screen.
Extinction Ratio Measurement View The Extinction Ratio Measurement tool is useful in determining the extinction ratio Нажмите чтобы увидеть больше of polarization maintaining PM optical fibers.
To make an ER measurement, linearly polarized light with a degree of polarization as close to 100% as possible must be precisely coupled into either the fast or the slow axis of the PM fiber.
The ER measurement is made while dynamically stressing the fiber under test.
Two common ways of stressing the fiber are by heating it and through mechanical means, such as applying a tensile force.
The applied stress causes cross coupling of the light between the fast and slow axes of the PM fiber, and this changes the measured polarization state.
During the application of a dynamic stress to the fiber, the measured polarization state continuously changes and a circle is traced on the Poincaré sphere, as shown in both Figure 8 and Figure 9.
The circle should be centered near the equator of the sphere, as the light should be predominantly linearly polarized.
Each measurement point represents an azimuth, ellipticity measurement pair.
The calculation of ER requires the complete measurement set to trace at least one full circle on the Poincaré sphere.
The diameter of the circle is a measure of the ER, and the smaller the circle, the higher the ER.
Please note that ER measurements made by a polarimeter are not affected by the degree of polarization DOP of light.
This is in contrast to measurements made by an ER meter, such as Thorlabs'.
When the ER measurements made by the polarimeter are corrected for absolute ellipticity and degree of polarization, as described in Section 8.
The software for the PAX1000 series of polarimeters allows the user to correct the ER measurement result for absolute ellipticity, DOP, or both.
This preference is specified in the ER Measurement setup screen shown in Figure 8.
The results of a completed ER measurement are shown in Figure 9.
Long-Term Measurement Long-Term measurements are set up using the function grouped under the TOOLS tab in the toolbar.
An extensive array of parameters, which are listed in Section 5.
Measurement settings include file information, sampling frequency, and measurement stop criteria.
Long-term measurements can be acquired while also using the software with other connected devices.
The PAX1000 Series Polarimeter GUI Interface GUI and Ссылка на страницу for the Remote Control of PAX1000 Series Polarimeters The download button below provides a link to the GUI and drivers that allow these polarimeters to be controlled via a PC with a Windows ® operating system.
An alignment tool is provided to optimize the beam path prior to measurement, long-term measurements are supported, and an extinction ratio ER tool facilitates ER measurements of polarization maintaining fibers.
Measurements from up to five sources can be simultaneously displayed.
These sources include physical and virtual devices displaying real-time data as well as measurements read from a file.
It functions as both an adapter and a light-tight end cap, as the VRC2SM1 is not opaque.
This is a response from Michael at Thorlabs.
Thank you very much for your inquiry.
I contacted you directly to send you the SCPI commands for the PAX1000.
This is a response from Michael at Thorlabs.
Thank you very much for the inquiry.
I contacted you directly to send the required information.
Do you use SAQWP05M-1700 as a "true" zero-order quarter-wave plate?
Dear customer, Thank you for your feedback.
In general this information is proprietary.
I will reach out to you in order to provide further details.
Dear Sir or Madam, is it possible to automatically read out the stokes parameters from the measurement device using e.
This way, by combining the polarimeter with motorized waveplates, the Müller matrices of any optics could be automatically retrieved.
Regards, Kim Lammers This is a response from Michael at Thorlabs.
Thank you very much for the inquiry.
It is possible to read out the Stokes parameters using LabVIEW.
To do this, you can implement the VI "TLPAX Get Stokes.
This VI gives you the four parameters S0, S1, S2 and S3 in units of Watt, where S0 is the total power, S1 is a measure of vertical and horizontal linear polarization, S2 is a measure of linear polarization at 45° and -45° and S3 is a measure of left and right circular polarization.
I checked the Auto Power Range in device settings.
The problem is that the Degree of Polarization DOP showed 170%.
Do you know where can be the problem?
The power was around -8 dBm and the range was automatically set to -2 dBm.
Peter This is a response from Nicola at Thorlabs.
Thank you for your inquiry!
I will contact you directly to provide further assistance.
This is a response from Sebastian at Thorlabs.
Thank 4 for the inquiry.
The PAX1000-Series can not spatially measure states of polarization.
For this kind of measurements Polarization Cameras are normally used.
I contacted you directly to provide assistance.
Hi, I would also be interested in information about the SCPI commands to control this device from Linux.
This is a response from Sebastian at Thorlabs.
Thank you for the inquiry.
I contacted you 4 to provide requested information.
Is it necessary to collimate the light first or could the polarisation be measured directly?
This is a response from Wolfgang at Thorlabs.
Thank you very much for your inquiry.
For accurate measurement results the beam would need to be collimated first.
An uncollimated beam would lead to incorrect results.
I will contact you directly to provide further information.
Hello, we are developing моему Korky, Long, Jonathan; Paul The Dog Who Could Dig хотел hyperspectral polarization setup.
We have a PAX5710.
Please, tell me, is it possible to automatically switch the wavelengths of the polarimeter?
What is the speed of this switching?
This is a response from Wolfgang at Thorlabs.
Thank you very much for your inquiry.
Unfortunately, there is no function in the software to switch the wavelength 4 automatically.
You could however use нажмите чтобы прочитать больше provided driver files to write a custom application which could make these switches.
The wavelength setting doesn't change anything in the measurement head, it is only used for the calculations of the polarization values.
This means that the приведенная ссылка speed isn't limited by the measurement head, but by the software and the driver.
So the computer you use, the operating system and even the programming environment would affect the maximum switch rate.
Unfortunately, we don't have any test data for this.
I will contact you directly to provide further information.
This is a response from Wolfgang.
Thank you very much for your inquiry.
I will contact you directly and send you further information.
Would be, please, available the list of direct USBTMC commands for the PAX1000 to work when writing a program for non-Windows or old OS?
This is a response from Wolfgang at Thorlabs.
Thank you very much for your inquiry.
It is generally possible to control the PAX1000 polarimeters with SCPI commands.
I have contacted you directly to provide further details.
One of the Spec notes specifies that All polarization specifications are valid for power range from -40 dBm to +3 dBm.
Does this mean the measurement at the some part of the dynamic range -60 dBm to +10 dBm is not valid?
This is a response from Wolfgang at Thorlabs.
Thank you very much for your feedback.
This note means that the specified accuracies are only valid for optical powers from -40 dBm to +3 dBm.
Outside of this range you will still get measurement values, however their accuracy can be worse.
For powers below -40 dBm the https://sekretlady.ru/svetodiodniy/nike-visokie-krossovki-acg-zoom.html in the amplification electronics will decrease the 4 />For powers larger than +3 dBm non-linear effects in the photodiode and the amplifier electronics will cause a decrease in accuracy as well.
I have contacted you directly to provide further assistance.
We have a PAN5710IR3 whose cable got damaged.
Can we buy a replacement cable and if so what is the part number?
Thanks This is a response from Wolfgang at Thorlabs.
Thank you very much for your inquiry.
Yes, we can provide replacement cables as a special item.
We will contact you directly https://sekretlady.ru/svetodiodniy/gel-lak-emi-emilac-101-volshebniy-les-9-ml.html further details.
I'm having trouble with my PAX polarimeter in that it won't give consistent power readings.
For example, whenever the beam is blocked by my sample fixturethe power goes to zero.
When I move the barrier out of the way, the polarimetry data returns but the power level is off by about -6dB.
I have to move the sample completely out of the way to get the polarimeter to recalibrate itself.
This is a response from Sebastian at Thorlabs.
Thank you for the feedback.
I have contacted you directly for troubleshooting and assistance.
What is the cost of a PAX5710IR2-T system, without such a laptop?
This is a response from Stefan at Thorlabs.
Thank you for your inquiry, I have contacted you directly to provide you with price information for this special.
This is a response from Stefan at Thorlabs.
Thank you for your inquiry.
The external measurement heads of our PAX5710 series polarimeters can be used for free-space beams as well as for fiber-coupled measurements.
A removable collimation package for a fiber connector input comes with each sensor head.
I will contact you directly to discuss your application in more detail.
What is the cost of a PAX5710VIS-T system, without such a laptop?
This is response from Stefan at Thorlabs.
Thank you for your inquiry.
As you left no contact information could you please contact me at europe thorlabs.
We have 626 nm light that goes from a PM fiber to a doubling stage and the 313 nm light ought to go into another PM fiber.
It would be great if we could use the PAX for both.
The stated range goes to 400 nm, but I assume it's not a sharp cutoff.
How far down could you in principle use the polarimeter?
This is a response from Stefan at Thorlabs.
Thank you very much for your inquiry.
Unfortunately the PAX will not work at 313nm, the unit is calibrated at the specified wavelength range 400-700nm.
There are several critical points, the polarizer has an AR coating which is not made for this wavelength therefore losses will increase.
The retardance of the built in quarter waveplate здесь be also different at this wavelength.
As there was no calibration done at this wavelength, it is also not possible to select the wavelength in the software.
At 313nm you are too читать away to get reliable results.
We are currently working on the development of a new PAX system which would also allow measurements in the UV.
I will contact you directly to check your needs in more detail.
Is there any estimation for the sensitivity of the polarimeter for each head?
In the specs it only appears -60 to 10 dBm, but I would need to know the sensitivity for my head PAX5710IR1-T 700-1000 nm.
This is a response from Stefan at Thorlabs.
Thank you very much for your inquiry.
The built in measurement sensor in general can measure from -60 to 10 dBm, this range is valid for all measurement heads VIS, IR1,IR2,IR3.
It has 5 gain settings and the corresponding power range depends on the wavelength selected.
The maximum power setting for each range at the selected wavelength gets displayed.
The recommended and default setting of the power range is 'auto', whereby the optimum power range will be set automatically.
Unfortunately you left no Email address.
Please contact me at europe thorlabs.
I would like to get the Mueller matrix of an optical device using the PAX.
For each of the 4 different polarizations, measured by a polarimeter with and without device under test.
The Mueller matrix can then be calculated out of the 8 determined Stokes vectors.
How can I do this?
This is a response from Stefan at Thorlabs.
Thank you very much for your inquiry.
In the Mueller calculusthe Stokes vector S is used to describe the polarization state of a light beamand the Mueller matrix M to describe the polarization-altering characteristics of a sample.
From a set of polarimetric measurementsyou can develop a set of linear equations which can be solved for certain of the Mueller matrix elements.
Since the Mueller matrix is a function of wavelengthangle of incidenceand location on the samplethese are assumed fixed in this simplification.
A polarization generator prepares a set of polarization states with a sequence of Stokes vectors Sq.
The Stokes vectors exiting the sample are MSq.
For sharing more detailed calculations I would like to contact you directly.
Unfortunately you left no Email address.
Please contact me at europe thorlabs.
Since the Mueller matrix is a function of wavelengthangle of incidenceand location on the samplethese are assumed fixed in this simplification.
A polarization generator prepares a set of polarization states with a sequence of Stokes vectors Sq.
The Stokes vectors exiting the sample are MSq.
These exiting states are analyzed by the qth polarization state analyzer Aqyielding the measured flux Pq.
For sharing more detailed calculations I would like to contact you directly.
Unfortunately you left no Email address.
Please contact me at 4 thorlabs.
I would like to know what point of view the polarimeter is giving me the measurements from.
If the polarimeter is giving me the measurement directly from the point of view of the source, the relative angle of M2 relative to M1 would be directly -45º.
However, if the polarimeter is giving me the measurement from the point of view of the polarimeter, then I would have to make the transformation to view it the 45º angle from the point of view of the source: the H polarization would be the same viewed from any point of view, but a +45º from the point of view of the polarimeter would actually be a -45º from the point of view of the source.
Then the relative angle of M2 relative to M1, after making the transformation, would be +45º.
This is a response from Thomas at Thorlabs.
Thank you very much for your inquiry.
The polarimeter gives you the measurement directly from the point of view of the polarimeter.
You can set an azimuth offset in the software to transform the point of view.
This means that you have to set the azimuth offset to 180° to get the point of view of the light source.
I will also contact you directly for any further questions.
Hello Thorlabs, The product is extremely helpful.
However I need some help regarding that.
I'm trying to use two slots of the polarimeter at the same time.
When I connect it to my laptop, only one slot is being recognised.
I have tried setting no.
So kindly suggest me on how to use two slots at the same time.
This is a response from Stefan at Thorlabs.
Thank you very much for your inquiry.
With the current software it is unfortunately not possible to control more than one card from the same software instance.
But you can open several instances of the GUI and select different cards to control them at the same time.
I have contacted you directly for discussing your application in detail.
Is it possible to check the error of the instrument e.
We run three instruments and whant to check the accuracy - and if it is out of range send it to service.
This is a response from Stefan at Thorlabs.
Thank you very much for your inquiry.
You can check if your devices work within the specifications by using a polarizer in a rotation mount in front of the Polarimeter.
By rotating the polarizer you can check if the values given out by the PAX correspond to the set angle at the rotation mount.
This way up to 180° you can check the accuracy of your PAX systems.
This is basically the 4 principle also used in our calibration setup.
For highest precision of the measurement we recommend to recalibrate the PAX every two years.
I will contact you directly to discuss your inquiry in more detail.
This is a response from Stefan at Thorlabs.
Thank you very much for your inquiry.
We offer in-Line fiber coupled Polarimeter which we specify with a sampling rate of 1 Million Samples per second.
Thank you very much for your inquiry.
In normal operation the PAX57xx card does not need any service.
For highest precision of the measurement it is recommended to recalibrate the PAX57xx every two years.
You can see the due date of calibration in the card info-menu of the card driver to determine the recalibration date.
If you want to recalibrate your polarimeter you should contact the technical support of Thorlabs and they will arrange a RMA return merchandise authorization for you.
A response form Thomas at Thorlabs: The error message "eigenmodes are not strictly linear" appears when the center of the circle is too far away from the equator on the Poincare sphere.
This can have several origin, ranging from a poor coupling into the fiber to the fact that the fiber contains any element that transforms the polarization for instance a piece of non PM fiber.
In some 4, some stress can occur in the connector that leads ot a transformation of the SOP within the distance that is stressed.
I will contact you directly to help finding out what the origin of this effect can be in your case.
Can you please tell me the meaning when a error message states" eigenmodes are not strictly linear".
Second when an error message appears the values are in yellow.
How accurate are they?
Thank you A response form Julien at Thorlabs: Dear Bruno, thank you for your request.
It is indeed possible to connect several polarimeter measurement heads to the same polarimeter mainframe.
The polarimeter system consists of three different parts: the mainframe TXP5004the readout card and the measurement head.
Each measurement head needs to be connected to a readout card.
The readout card being the same for all wavelengths range, one can simply connect a head having a different wavelength range to the same card.
If two or more polarimeters are to be used simultaneously, one will need as many cards as there are measurement heads.
The TXP5004 can fit up to four cards.
Should you have any furtehr question, please do not hesitate to contact us at techsupport thorlabs.
The image seems to suggest that it is possible to attach mutltiple sensor heads to one polarimeter; is this indeed the case?
Sincerely, Bruno van Albada A response from Julien at Thorlabs: Dear Bruno, thank you for your inquiry!
This means that the absolute accuracy that is specified for those two angles does not translate linearly to an accuracy for the stokes vector.
Rather the measurement error on the Stokes vector will vary with the actual angles measured.
When one uses the above formula to calculate back S3 for the upper and lower boundaries of this interval, one finds that the error on S3 can be as high as 20%.
If the ellipticity is however close to 45°, the error on S3 will be much smaller than 0.
The same type of effect will influence the measurement accuracy of S1 and S2.
I would be happy to further discuss your application and its requirements in order to estimate to which extent the non linear dependence of the Stokes parameters on the polarization angles can have an influence on your measurement results.
Please feel free to contact us at techsupport thorlabs.
This is now stated in terms of degrees on the poincare sphere; could you please tell me what this means нажмите для деталей terms of the Stokes parameters in percentages, if at all possible?
Sincerely, Bruno van Albada Response from Buki https://sekretlady.ru/svetodiodniy/stupitsa-v-sbore-s-podshipnikom-gsp-9330010k.html Thorlabs: Thank you for your feedback.
Unfortunately, we have not been able to track your email.
We have contacted you directly to ask you to resend the quote to TechSupport thorlabs.
We usually respond to inquiries within 24 hrs.
Hello, This is Sanmina-SCI optical technology Shenzhen Ltd.
I sent an email to Thorlabs for one calibration quotation for our PAX system on April 22.
But I do not get any respond till to today.
The limitation of max of 1024 datapoints is given for the scope mode of PAXs graphic user interface and the reason for it is the internal memory size of the polarimeters DSP.
This enables to record each acquired data point, even at the highest sampling rate.
The downside is the limited memory size.
With the current hardware design the memory cannot be extended.
However, we have noticed this feature is required and will consider that for future product design.
I, we bought a new Polarimeters "PAX5710IRR3" with the remote head "PAN5710IR3".
The maximum number is 1024.
We have 4 old models of polarimeters "PA480" with no limit of points for the aquisition mode.
We need 10000 points or more of aquisition for the production line.
What is the cause of the limitation: electronics, software???
My telephone number is the 888 255-9303 ext 4266 A response from Greg at Thorlabs to oguz.
One of our Applications Engineers will be in contact with you shortly.
The dynamic range is -60 dBm to 10 dBm is sufficient.
As I see, PAX5720IR3-T is suitable.
Additionally, is it possible to 4 the wavelentgh span of polarimeter by adding an external 1000-1350 nm sensor module into PAX5720IR3-T?
If it is so, please order a separate quotation for this additional module and send me urgently.
The "READY" LED illuminates when power is connected.
Three models cover the visible to near-infrared wavelength range.
A power supply with a region-specific adapter is included with each polarimeter.
Additional power supplies are available below.
We also offer a recalibration service for our polarimeters, which can be purchased below.
We recommend yearly calibration to ensure accurate measurements.
It is suitable for any Mini-XLR-compatible device that requires a 15 VDC output, and is directly compatible with our PAX1000 series polarimeters, sold above.
A region-specific adapter plug is shipped with the DS15 power supply based on your location.
To ensure accurate measurements, we recommend recalibrating the polarimeters annually.
Please enter the Part and Serial of the polarimeter that requires recalibration prior to selecting Add to Cart.
Please Note: To ensure your polarimeter is routed appropriately once it arrives at our facility, please do not ship it prior to being provided an RMA Number and return instructions by a member of our team.
Sales: 1-973-300-3000 Technical Support: 1-973-300-3000.

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