3.2 GUI Overview 3.3 Menu File 3.4 Menu Device 3.5 Menu View 3.6 Menu Tools 3.7 Menu Help 3.8 Status Bar 4 PAX1000 Settings 5 Operating Instruction 5.1 Alignment Assistance 5.2 PAX1000 Measurements 5.2.1 Measurement Value Table 5.2.2 Polarization Ellipse 5.2.3...
Page 4
Correction of the Polarimeter ER Measurements 9 Appendix 9.1 Technical Data 9.2 Dimensions 9.3 Certifications and Compliances 9.4 Warranty 9.5 Copyright and Exclusion of Reliability 9.6 Thorlabs 'End of Life' Policy 9.7 List of Acronyms 9.8 Literature 9.9 Thorlabs Worldwide Contacts...
Each measurement sensor is calibrated at different wavelength points. These base points are interpolated. The PAX1000 is basically powered via the USB port. For a measurement speed higher that 50 samples per second, an additional power supply is required - please connect the DS15 power supply to your mains outlet and to the PAX1000.
Page 7
1 General Information equipment other than those specified by Thorlabs GmbH. The correction of interference caused by such unauthorized modification, substitution or attachment will be the re- sponsibility of the user. The use of shielded I/O cables is required when connecting this equipment to any and all optional peripheral or host devices.
® · Windows 8.1 (32-bit, 64-bit) ® · Windows 10 (32-bit, 64-bit) For operation of the PAX1000, the following software is required as well: ® · NI-VISA Runtime (Version 5.4 or later) ® · Microsoft .Net (Version 4.6.1 or later) ®...
If the shipping container seems to be damaged, keep it until you have inspected the contents and you have inspected the PAX1000 mechanically and electrically. Verify that you have received the following items within the package, depending on the ordered item: 1.
Transformation (FFT) analysis allows then to calculate the 3 normalized Stokes vectors s1, s2 and s3, the polarized power and degree of polarization DOP. These parameters are sufficient to completely describe the polarization state of the light incident on the PAX1000 polarization. Please see section Rotating Waveplate Technique for detailed explanation.
PAX1000 2.3 Operating Elements Operating Elements Front Mounting hole for Thorlabs 30 mm cage system (4-40, depth 5.5 mm), 4 places Input aperture with Thorlabs SM1 (1.035"-40) external thread Input aperture with Thorlabs SM05 (0.535"-40) internal thread PAX1000 Operating Elements (Rear)
Appendix. Note It is important to align the incident beam perpendicularly to the front surface of the PAX1000 and centered to its input aperture. The centering can be easily aligned by using the delivered protection cap - the PAX1000VIS comes with an cross-hair engraved end cap (in the picture left), the PAX1000IR1 and PAX1000IR2 come with a mounted viewing target.
The PAX1000 software package contains beside the PAX1000 software a NI VISA Runtime and the Thorlabs DFU Wizard. The latter is required to enable the user to install future firmware updates to the PAX1000. The software package can be downloaded from the website https://www.thorlabs.com/software_pages/ViewSoftwarePage.cfm?Code=PAX1000x...
Please take into account an initial warm up time of the PAX1000xxx. Note The supplied USB cable is certified for use with the PAX1000. The use of other and / or longer cables may lead to degradation of performance, data loss or even malfunction of the PAX1000.
Prior to explaining the GUI in detail, there are some general comments to make about the inter- actions between the PAX1000 hardware and the control software. Please read these com- ments carefully as this information is important to understanding the functionality.
Status Bar ( ). The ribbons can be minimized and restored using the small icon to the right of the Thorlabs logo. Click to an area of the screenshot below to be directed to the appropriate section for detailed information.
Page 23
3 Graphical User Interface (GUI) Save Configuration This option allows the setup of the GUI and/or the connected PAX1000 polarimeters to be saved. The saved configuration can be loaded later for use in future experiments, or with a dif- ferent optical setup, or copied to and loaded into the software running on a different computer.
Page 24
PAX1000 Save Measurement The Measurement file is an CSV file that contains: · Device settings and device information of the PAX1000 that was used for measurement. · The most recent 1000 measurement results with time stamp. Open Here you can open a previously save configuration or a measure- ment results file.
Page 26
Power Range" is checked). In particular cases it might be useful to fix the power range - un- check the box and set the power range then manually. Device Color: Select a color for the selected PAX1000 instrument. This color will be used for Polarization Ellipse and Poincaré Sphere display of the measurement data. For each connec- ted and active PAX1000 a different color is assigned that can be changed individually.
Click to an icon in the above shown screenshot to view the appropriate manual section. 3.7 Menu Help Troubleshooting Contact Technical Support opens Thorlabs' web site with the list of world-wide contacts. Save Logfile: This file logs the most recent 5 software sessions.
Product License Opens the License.rtf file. About Thorlabs PAX1000 Displays information about the current PAX1000 software. 3.8 Status Bar By default, the status bar displays only the actual date and time: It is used to indicate common errors as well as information about long-term measurement (LtM)
FFT points. Note When the PAX1000 is powered via USB only, the Basic Sample Rate can be set between 50 and 100 Hz. With external power supply, the maximum Basic Sample Rate is 400 Hz.
Click the Start Alignment button. Adjust the alignment of the beam with respect the PAX1000 beam. When the best alignment is achieved, click Stop Alignment and close the window.
The PAX1000 software provides several polarization measurement views that can be called from the View ribbon. If this ribbon is hidden, please click the small arrow next to the Thorlabs logo (marked yellow): These views are described in detail in the subsequent sections: Measurement Value Table ·...
Click the drop-down arrow (marked yellow) to expand the list and select the desired parameters. When checking the box of the active PAX1000, all parameters will be enabled, with the pos- sibility to disable any of them.
· Click the colored box to show the current SOP in front. If you have more than one PAX1000 connected, the click shows the current SOP of the selected device. · Hold the left mouse button and drag to rotate the sphere.
Time Format: If a measurement is loaded and selected for display, the time format can be toggled between time stamp and elapsed time. For running measurements (a PAX1000 is se- lected), only the time stamp is used.
Page 37
The yellow marker appears instantly when hovering the mouse over the diagram only if a load- ed measurement is displayed. In live mode, when the measurement of a PAX1000 is displayed, the yellow marker appears only after the mouse wheel was rotated. Then the display of the current measurement is paused and the diagram can be zoomed.
It is important to couple the linearly polarized light parallel to the slow axis of the fiber under test. The output of the fiber under test is connected to the PAX1000 using the supplied fiber collim- ator with the SM1 adapter.
Page 45
Save the numeric test results and the Poincaré Sphere screenshot to a PDF file. Return to the previous window. Close the ER Measurement Wizard and return to the PAX1000 GUI. Please see the Tutorial in the appendix for detailed explanation of the options...
PAX1000 5.2.7 Virtual Device A virtual PAX1000 can be connected. This is an easy way to evaluate the PAX1000 software without the hardware. This device is based on a PAX1000IR1 with its default settings . These settings cannot be changed.
Page 49
This limitation affects the maximum trace length. If more than one PAX1000 is connected, the maximum number of points that can be displayed on the Poincaré sphere, equal to the maximum trace length, will be shared: 1 PAX1000: max.
Windows 7, Windows 8.1 and Windows 10 (32 and 64 bit) Note PAX1000 software and drivers contains 32 bit and 64 bit applications. In 32 bit systems, only the 32 bit components are installed to C:\Program Files\…...
Page 54
C:\Program Files\IVI Foundation\VISA\VisaCom64\… …\Primary Interop Assemblies\Thorlabs.PAX1000_64.Interop.dll Example for C Source file: C:\Program Files (x86)\IVI Foundation\VISA\WinNT\TLPAX\Examples\… …CSample\sample.c (C program how to communicate with a PAX1000 Series polarimeter) Example for C# Solution file: C:\Program Files (x86)\IVI Foundation\VISA\WinNT\TLPAX\Examples… …\CSharp\Thorlabs.PAX_CSharp_Demo.sln Project file: C:\Program Files (x86)\IVI Foundation\VISA\WinNT\TLPAX\Examples…...
7 Maintenance and Service 7 Maintenance and Service Protect the PAX1000 from adverse weather conditions. The PAX1000 is not water resistant. Attention To avoid damage to the instrument, do not expose it to spray, liquids or solvents! The unit does not need regular maintenance by the user. It does not contain any user-repair- able modules or components.
ð If this message appears at normal operating temperature, please contact Thorlabs. USB power supply voltage is too low. ð The PAX1000 requires a higher operating current than the standard USB2.0 port can deliver, e.g. at hing measurement speed. ð Connect the external power supply.
Page 57
Please check if stress was applied to the fiber during the measurement. The measured ellipticity change is close to or less than the PAX1000 measurement accur- acy. ð Was the fiber Increase the fiber stress during measurement? The ellipticity of some points is bigger than |25°|.
When light is elliptically polarized, the electric field (E field) vector rotates with respect to a Cartesian coordinate system as it propagates. The software of the PAX1000 and the prede- cessor, the PAX57xx Polarimeter System, plot the E field vector with respect to a right-handed coordinate system with x, y, and z axes.
PAX1000 8.1.7 Polarization Parameters - Definitions In this section all used in the PAX1000 software polarization parameters are explained. Azimuth / Ellipticity See section Polarization Ellipse Poincaré Sphere Degree of polarization; it is the ratio of the polarized power to the total power of the measured light signal.
It is described in the following section. 8.2.1 Rotating Waveplate Technique The optical unit of the PAX1000 polarization measurement sensor consists of a rotating true zero order quarter waveplate (QWP), a fixed linear polarizer and a photodiode. The waveplate transforms the input polarization.
Page 75
Note In the PAX1000 a true zero order l/4 waveplate is used. For this type of waveplate, the exact l/4 retardation is given only at its reference wavelength. In order to enable a broad operating wavelength range of the polarimeter, the wavelength-dependent retardation must be com- pensated in order to achieve accurate measurements.
Page 79
The smaller the circle the higher is the ER: ER Meter Technique Thorlabs' ERM100 is based on a rotating polarizer. The polarizer transmits only the polarized part of the light parallel to its transmission axis. The transmitted power depends not only on the input polarization but also on the degree of polariza- tion (DOP).
A polarimeter measurement can determine the ER of the output light, as shown in the figure below. ER Measurement Screen of a Thorlabs PAX1000 The center of the circle represents the center Azimuth and Ellipticity. It should be positioned on the equator.
Page 81
ER for linearly polarized light. The spinning analyzer method, which is used by Thorlabs' ERM100, takes DOP into account and accurately measures ER. As an example of how the DOP affects the ER, consider the fol- lowing plot.
Page 83
· Taking into account the measured DOP of 99.588 %, the corrected for center ellipticity and DOP extinction ratio is 19.12 dB. Note: This is the ER that would have been meas- ured by an instrument, such as the Thorlabs GmbH ERM100, that uses the spinning ana- lyzer technique.
) One sample per half turn and 200 Hz motor drive speed; with connected external power supply. ) For any SOP with -30° < ellipticity < 30°. ) Required for high-speed measurements; included with the PAX1000 ) non-condensing All technical data are valid at 23 ± 5°C and 45 ± 15% rel. humidity (non condensing).
For warranty repairs or service the unit must be sent back to Thorlabs GmbH. The customer will carry the shipping costs to Thorlabs GmbH, in case of warranty repairs Thorlabs GmbH will carry the shipping costs back to the customer.
Waste treatment on your own responsibility If you do not return an “end of life” unit to Thorlabs GmbH, you must hand it to a company spe- cialized in waste recovery. Do not dispose of the unit in a litter bin or at a public waste disposal site.
Email: europe@thorlabs.com Email: scandinavia@thorlabs.com France Brazil Thorlabs SAS Thorlabs Vendas de Fotônicos Ltda. 109, rue des Côtes Rua Riachuelo, 171 78600 Maisons-Laffitte São Carlos, SP 13560-110 France Brazil Tel: +33-970 444 844 Tel: +55-16-3413 7062 Fax: +33-825 744 800 Fax: +55-16-3413 7064 www.thorlabs.com...
Need help?
Do you have a question about the PAX1000 and is the answer not in the manual?
Questions and answers