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Summary of Contents for THORLABS Redstone OSA302
- Page 1 Redstone OSA302, ® Redstone OSA305, OSA201C, OSA202C, OSA203C, OSA205C, OSA207C Optical Spectrum Analyzers Manual...
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Page 2: Table Of Contents
Optical Spectrum Analyzers Table of Contents Warning Symbol Definitions ..................1 Chapter 1 Chapter 2 Safety..........................2 Chapter 3 Warranty ........................3 3.1. Restriction of Warranty ................... 3 Description ........................4 Chapter 4 4.1. Introduction ......................4 4.2. Interferometer Design ..................... 4 4.3. - Page 3 Optical Spectrum Analyzers 7.2.7. Wavelength Calibration ....................25 7.3. Working with Data in Traces ................. 26 7.3.1. Trace Update Options ....................26 7.4. Saving and Loading Data ..................27 7.4.1. Saving Data ........................27 7.4.2. Loading Data ......................... 27 7.5. Analyzing Data ....................... 27 7.5.1.
- Page 4 Optical Spectrum Analyzers 15.1. Waste treatment is your own responsibility..........47 15.2. Ecological background .................. 47 Thorlabs Worldwide Contacts .................. 48 Chapter 16...
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Page 5: Chapter 1 Warning Symbol Definitions
Optical Spectrum Analyzers Chapter 1: Warning Symbol Definitions Warning Symbol Definitions Chapter 1 Below is a list of warning symbols you may encounter in this manual or on your device. Symbol Description Direct Current Alternating Current Both Direct and Alternating Current Earth Ground Terminal Protective Conductor Terminal Frame or Chassis Terminal... -
Page 6: Chapter 2 Safety
WARNING The OSA20xC instruments include a He-Ne laser. The Redstone OSA302 and Redstone OSA305 include a red laser and an infrared laser. The classification of these lasers follows the European Standard IEC 60825-1:2014. Viewing the laser output with telescopic optical instruments (for example, telescopes and binoculars) close to the aperture may pose an eye hazard! Using the instrument in combination with collimating optics may have an impact on the assigned laser classification. -
Page 7: Chapter 3 Warranty
Thorlabs will see to defaults by repair or exchange if the product is entitled to warranty. For warranty repairs or service, the unit must be sent back to Thorlabs or to a place determined by Thorlabs. The customer will carry the shipping costs to Thorlabs; in case of warranty repairs Thorlabs will carry the shipping costs back to the customer. -
Page 8: Chapter 4 Description
OSA20xC instruments are general-purpose analyzers with moderate resolution and high update rate. The Thorlabs FT-OSA has an FC/PC-style optical fiber input and a free-space input. After the input light is collimated, a beamsplitter divides the optical signal into two separate branches. The path length difference between the two branches is varied up to a maximum of 40 mm for the OSA20xC instruments or 160 mm for the Redstone OSA30x instruments. -
Page 9: Interferometer Design
Rayleigh spectral resolution as those tools use several data points and curve fitting techniques. The Thorlabs OSAs utilize a built-in, actively stabilized reference laser to interferometrically record the variation of the optical path length. This reference laser is inserted into the interferometer and closely follows the same path traversed by the unknown input light field. - Page 10 Optical Spectrum Analyzers Chapter 4: Description Figure 1. Optical Schematic of the Thorlabs OSA20xC Detailing the Dual Retroreflector Design Note: In the OSA20xC interferometer design, both retroreflectors are attached to a common platform that is moved via a voice-coil motor. This configuration provides an optical delay that is four times the displacement of the carriage.
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Page 11: Interferogram Data Acquisition
Optical Spectrum Analyzers Chapter 4: Description Figure 2. Optical Schematic of the Thorlabs Redstone OSA30x Note: The Redstone OSA302 does not include the dispersion compensation plate in the interferometer. 4.4. Interferogram Data Acquisition The OSA20xC instruments use the interference pattern of the HeNe reference laser to clock a 16-bit Analog-to- Digital Converter (ADC) such that samples are taken at fixed, equidistant optical path length intervals. -
Page 12: Interferogram Data Processing
As suggested by NIST we assume the CO concentration to be 450 µmol/mol. Older versions of the Thorlabs OSA software (v2.90 and older) use a modified version of Edlén’s formula, which agrees with Ciddor’s formula to less than 10... -
Page 13: Resolution And Sensitivity
Optical Spectrum Analyzers Chapter 4: Description stabilized HeNe are well-known and controlled. The Redstone OSA30x platform incorporates a frequency- locked reference laser with a vacuum wavelength of 1532.8323 nm. Because of the frequency-lock, long-term wavelength accuracy is ensured, and the reference laser is connected to an FC/APC output and can be fed into the instrument fiber input for additional calibration if so desired;... - Page 14 Optical Spectrum Analyzers Chapter 4: Description Resolution in Spectrometer Mode OSA20xC, Low OSA20xC, High OSA30x, Low OSA30x, Medium Low OSA30x, Medium High OSA30x, High 10 11 12 Wavelength (µm) Figure 3. Resolution as a Function of Wavelength Note that the resolution shown is valid over the specified wavelength range of the individual instrument (ie. OSA305 is specified from 1.0 µm to 5.6 µm).
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Page 15: Dynamic Range/Optical Rejection Ratio
It can be seen as the filter response of the OSA and can be defined as the ratio of the power at an interesting peak to the power at a given distance from said peak. For the Thorlabs OSAs the ORR is defined with a stricter condition: instead of just considering the power at a single data point, e.g., 25 GHz from the peak,... -
Page 16: Apodization
Optical Spectrum Analyzers Chapter 4: Description 1532 nm Frequency-Locked Laser Spectrum 1524 1526 1528 1530 1532 1534 1536 1538 1540 1542 Wavelength (nm) Figure 6. Spectrum of a 1532 nm Frequency-Locked Laser measured by a Redstone OSA305. The vertical lines represent where the ORR is measured. 4.11. -
Page 17: Software
(< 430 Ω) must be applied across the terminals of the interlock connector. The shorting device (interlock pin) installed in all units shipped from Thorlabs performs this function. Leave the shorting device installed unless using an external safety circuit or other type of remotely controlled switch to enable laser output. Making use of the interlock feature requires the appropriate 2.5 mm phono-type plug, which is readily available through most... - Page 18 Optical Spectrum Analyzers Chapter 4: Description back panel’s interlock jack in place of the shorting device. The electrical specifications of the interlock jack are listed in Section 11.6 Interlock Specifications (Redstone OSA30x only). Note that the Redstone OSA30x instruments require the reference laser source to collect accurate interferograms;...
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Page 19: Chapter 5 Using The Free-Space Input
This can be accomplished by using the provided mounting feet to secure the OSA to the breadboard using two or more of Thorlabs’ CF175 clamping forks, as shown in Figure 10. Likewise, even Page 15... -
Page 20: Activation Of Alignment Beam
If the beam height of your experimental setup is not consistent with the free-space input, we recommend using a periscope assembly, such as Thorlabs’ RS99(/M) periscope, to adjust the beam height to that of the OSA’s input. Do not use longer posts to elevate the OSA. - Page 21 Optical Spectrum Analyzers Chapter 5: Using the Free-Space Input Figure 11. Alignment Beam Activation and Notification for OSA20xC Models The Redstone OSA30x instruments also include a red alignment laser, which will exit the free-space port when activated with a button in the “Free-space Alignment” window (see Figure 12). When the alignment beam is activated, one optical arm of the interferometer is blocked and no interferometric measurements can be performed, and a warning message will appear in the ThorSpectra software.
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Page 22: Free-Space Beam Alignment Example
Use the mirror closest to the test source to steer the input source into the OSA, using a viewing card (such as Thorlabs Item # VRC2) and/or an alignment plate (such as Thorlabs Item # CPA2) to aid in the alignment. -
Page 23: Adjust Software Settings
Optical Spectrum Analyzers Chapter 5: Using the Free-Space Input Figure 14. Example Setup for the Redstone OSA30x using 30 mm cage components coupled to the 60 mm cage rod holes using an LCP02 cage plate adapter. 5.3.2. Adjust Software Settings Once the system is roughly aligned, disable the alignment beam in order to see a signal in the main software window. -
Page 24: Final Alignment
Optical Spectrum Analyzers Chapter 5: Using the Free-Space Input Figure 14. An Example of a Helpful Windows Layout for Free-Space Alignment 5.3.3. Final Alignment Repeat the alignment process in Section 5.3.1, but utilize the OSA readings instead of the viewing card to optimize the alignment. -
Page 25: Chapter 6 Pure Air
Chapter 6 OSA instruments have two hose connectors which can be connected to an external air purifier, such as Thorlabs Item # PACU Pure Air Circulator Unit. We recommend a flow rate of 2 liters/min. Simply attach two hoses (one supply and one return) to the 1/4"... -
Page 26: Chapter 7 Software
GUI that are specific to the OSA20xC and Redstone instruments. 7.1. Spectrum View and Interferogram View The Thorlabs OSA can be operated in one of two views: Spectrum view or Interferogram view. 7.1.1. Spectrum View In Spectrum view, •... -
Page 27: Setting The Unit Of The Vertical Axis
Optical Spectrum Analyzers Chapter 7: Software Figure 17. Setting the Horizontal Axis Unit in Spectrum view 7.1.4. Setting the Unit of the Vertical Axis In Interferogram view, the vertical axis displays the interferogram as a percentage of the full measurable range (default) or in “counts”... -
Page 28: Averaging Interferograms (Redstone Osa30X Only)
While a Michelson interferometer depends on the input light not changing properties during a measurement, it is possible to measure pulsed sources with a Thorlabs OSA under certain circumstances. The pulses will introduce artifacts – so called spectral ghosts – in the spectrum, but if the repetition rate of the input light is... -
Page 29: Wavelength Calibration
FC/APC connector on one side and a FC/PC connector on the other side is required, such as the Thorlabs Item # P5-SMF28E-FC-2; one such fiber is included with the instrument at delivery. The reference laser can be accessed through the FC/APC connector on the front panel under the “Calibration Output”... -
Page 30: Working With Data In Traces
Optical Spectrum Analyzers Chapter 7: Software Figure 22. Wavelength Calibration Dialog for Redstone OSA30x 7.3. Working with Data in Traces For interferogram-acquiring devices such as OSA20xC and Redstone OSA30x, the ThorSpectra software handles not only up to 26 traces labeled from A to Z for spectra but also traces labeled from 1 to 26 for interferograms. -
Page 31: Saving And Loading Data
Optical Spectrum Analyzers Chapter 7: Software sub-menu for traces with at least two traces to the left, e.g., this option is available for traces C and higher. • Quotient: Traces with this option will be updated as the quotient between two other traces to the left in the Trace controls bar. -
Page 32: Coherence Length
Optical Spectrum Analyzers Chapter 7: Software When the Wavelength Meter tool is enabled, the analysis results are displayed in a floating window or docked to the main display area. The calculated wavelength is displayed in the currently set x-axis spectral units. If the input light does not have sufficiently narrow linewidth for the analysis to work properly, the text “Invalid Value”... -
Page 33: Scripting The Thorspectra Software (Osa20Xc Only)
Optical Spectrum Analyzers Chapter 7: Software 7.6. Scripting the ThorSpectra Software (OSA20xC only) The operations found in the Graphical User Interface of the ThorSpectra software can be automated using scripts. Scripts can be run in two ways: either by opening a script in the scripting dialog box, or as a command- line argument to the software at startup. -
Page 34: Chapter 8 Settings
Optical Spectrum Analyzers Chapter 8: Settings Settings Chapter 8 Pressing the Settings button in the main menu will open the Settings dialog. By default, the Settings dialog box will start in Basic level. To see more advanced settings, press the “Switch to Advanced level” button in the lower left corner of the dialog. -
Page 35: Environment Settings
Optical Spectrum Analyzers Chapter 8: Settings allows for higher gain settings, which can result in a higher SNR of the measurement, especially for weak sources, but also a slower update rate. Note: When changing the Resolution and/or Sensitivity settings, the speed and stroke length of the motor in the instrument will change. -
Page 36: Spectrum Settings
Optical Spectrum Analyzers Chapter 8: Settings Figure 29. Interferogram Processing Settings 8.2.4. Spectrum Settings In the Spectrum settings tab, it is possible to specify a large number of settings for the processing of the spectra. Figure 30. Spectrum Processing Settings •... - Page 37 Optical Spectrum Analyzers Chapter 8: Settings • Spectrum Range: If only a sub-section of the available x-axis range is required for the measurement, it can be beneficial to crop the spectrum to the desired range to reduce the amount of data to work with. Note that this cropping is not reversible.
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Page 38: Labview Drivers
The drivers are based on functions found in the FTSLib.dll which is also used by the application GUI. See Thorlabs → Manual FTSLib in the Windows ®... -
Page 39: Chapter 10 Troubleshooting
Simply uncheck the “Lock axis” check box and click “Ok.” If all else fails Bring up the Error log by simultaneously clicking Ctrl+Shift+E. Save it to file and attach it to an email to techsupport@thorlabs.com. Page 35 STN053070-D02... -
Page 40: Chapter 11 Technical Data
11.0 µm for OSA207C, and 1.0 - 5.5 µm for OSA305. See Section 4.10. k. Connectors for other fiber input receptacles are available upon request. Contact techsupport@thorlabs.com for details. Each specification is valid for a single mode FC/PC-terminated patch cable, as well as for a collimated free-space beam with diameter <3 mm and divergence <3 mrad, assuming the included protective window is installed in the free-space... -
Page 41: Model-Specific Specifications
The window is removable: SM05 thread for OSA20xC and SM18 thread for Redstone OSA30x. d. Please note that the Redstone OSA302 is sensitive to wavelengths ≤240 nm. Light sources at these wavelengths will limit the lifetime of the detectors within the instrument. We recommend using a long-pass filter to block wavelengths ≤240 nm. -
Page 42: Redstone Osa30X
Optical Spectrum Analyzers Chapter 11: Technical data 11.3.2. Redstone OSA30x Time Between Updates (Update Frequency) Resolution Sensitivity Medium Low Medium High High 1.6 s (0.64 Hz) 2.0 s (0.51 Hz) 3.7 s (0.27 Hz) 9.5 s (0.11 Hz) Medium 3.1 s (0.32 Hz) 4.1 s (0.24 Hz) 8.6 s (0.12 Hz) 23 s (0.04 Hz) -
Page 43: Chapter 12 Mechanical Drawings
Optical Spectrum Analyzers Chapter 12: Mechanical Drawings Mechanical Drawings Chapter 12 12.1. Redstone OSA30x 12.1.1. Dimensions Page 39 STN053070-D02... -
Page 44: Front And Back Panels
Optical Spectrum Analyzers Chapter 12: Mechanical Drawings 12.1.2. Front and Back Panels Rev F, January 2, 2024 Page 40... -
Page 45: Osa20Xc
Optical Spectrum Analyzers Chapter 12: Mechanical Drawings 12.2. OSA20xC 12.2.1. Dimensions Page 41 STN053070-D02... -
Page 46: Front And Back Panels
Optical Spectrum Analyzers Chapter 12: Mechanical Drawings 12.2.2. Front and Back Panels Rev F, January 2, 2024 Page 42... -
Page 47: Chapter 13 Certifications And Compliances
However, there is no guarantee that interference will not occur in a particular installation. Thorlabs is not responsible for any radio television interference caused by modifications of this equipment or the substitution or attachment of connecting cables and equipment other than those specified by Thorlabs. The correction of interference caused by such unauthorized modification, substitution or attachment will be the responsibility of the user. -
Page 48: Osa20Xc
Optical Spectrum Analyzers Chapter 13: Certifications and compliances 13.2. OSA20xC Category Standards or Description Electrical Equipment for Measurement, Control and EN 61326-1:2006 Laboratory Use – EMC Requirements EN55011, Group 1, Class B Emission EN55011, Group 1, Class B Conducted Emission EN 61000-3-2 AC Power Line Harmonic Emissions EN 61000-3-3... -
Page 49: Chapter 14 Appendix
Optical Spectrum Analyzers Chapter 14: Appendix Appendix Chapter 14 14.1. Calculating Absorption Cross Sections The ThorSpectra software calculates absorption cross sections from the HITRAN line-by-line references by separating each line into a line strength and a line shape: �� ( �� ) = �� ( ��... -
Page 50: Apodization Functions
Optical Spectrum Analyzers Chapter 14: Appendix 14.2. Apodization Functions The following apodization functions are implemented in the ThorSpectra software: Norton-Beer �� ( �� ) = 0.384093 − 0.087577 ( 1 − �� ) + 0.703484 ( 1 − �� �������� ��������... -
Page 51: Chapter 15 Regulatory
Waste treatment is your own responsibility If you do not return an “end of life” unit to Thorlabs, you must hand it to a company specialized in waste recovery. Do not dispose of the unit in a litter bin or at a public waste disposal site. - Page 52 Optical Spectrum Analyzers Chapter 16: Thorlabs Worldwide Contacts Thorlabs Worldwide Contacts Chapter 16 For technical support or sales inquiries, please visit us at www.thorlabs.com/contact for our most up-to-date contact information. USA, Canada, and South America UK and Ireland Thorlabs, Inc.
- Page 53 www.thorlabs.com...
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