Optical Spectrum Analyzers

The software package for Thorlabs' Optical Spectrum Analyzers (OSA) includes a GUI and instrument drivers. Support for Compact CCD Spectrometers is available via the CCS installer. The following downloads are available:

1. Software: Software, Drivers, and Utility files for the OSA20xC and Redstone OSA30x instruments. Choose this tab if you are installing new software or upgrading from earlier versions of Thorlabs' OSA software.
2. Libraries: A package that installs the necessary drivers for controlling the OSA20xC and Redstone OSA30x instruments through LabVIEW^®. Please unzip and read the ReadMe.pdf file first.
3. GitHub Resources: Link to Thorlabs' OSA content on GitHub^®.
4. Archive: Previous versions of the OSA software and LabVIEW^® drivers, including versions compatible with Windows^® XP, Windows^® Vista, and Windows^® 7.

• Software
• Libraries
• GitHub Resources
• Archive

Installer for OSA20xC and Redstone OSA30x
Description	This will install control software for our OSA20xC and Redstone OSA30x instruments. It includes a "virtual device" mode for evaluating the software and drivers for C, C++, and C#. To include support for CCD spectrometers, please download the CCS installer.
Version	3.35
Filesize	221 MB
Download	Only download from trusted sources, like Thorlabs, and always scan files before executing.
Change Log
Additional	Please note: The 'Minimum System Requirements' listed below are sufficient for operating the software with a virtual device for evaluation purposes. The 'Recommended System Requirements' are strongly suggested for actual measurements.
System Requirements	Minimum: Windows® 7 SP1, 8, 10, or 11 (64 Bit) USB 3.0 Port Monitor Resolution: 800 x 600 Intel Core i5 or AMD Athlon II 8 GB RAM Recommended: Windows 11 (64 Bit) Intel Core i9 or AMD Ryzen 16 GB RAM
Additional Software	.NET framework 4.7.2 or higher is required. An installer for .NET framework 4.7.2 is included in the full installer.

OSA LabVIEW Drivers
Description	The installer below contains the necessary drivers for controlling the OSA20xC and Redstone OSA30x instruments through LabVIEW®.
Version	1.0.1.16
Filesize	9.43 MB
Download	Only download from trusted sources, like Thorlabs, and always scan files before executing.
System Requirements	LabVIEW 2010 or Higher

GitHub® Resources
Description	Thorlabs has been expanding our offering of example code for OSA instruments on our GitHub account. This includes examples for the Python programming language, which is a useful starting point for implementing Thorlabs' OSAs in common applications.
Additional	Please click the icon below to visit our GitHub page.

Version 3.31

Version 3.31
Description	This will install control software for our OSA20xC and Redstone OSA30x instruments. It includes a "virtual device" mode for evaluating the software and drivers for C, C++, and C#. To include support for CCD spectrometers, please download the CCS installer.
Version	3.31
Filesize	217 MB
Download	Only download from trusted sources, like Thorlabs, and always scan files before executing.
Change Log
Additional	Please note: The 'Minimum System Requirements' listed below are sufficient for operating the software with a virtual device for evaluatiAon purposes. The 'Recommended System Requirements' are strongly suggested for actual measurements.
System Requirements	Minimum: Windows® 7 SP1, 8, 10, or 11 (64 Bit) USB 3.0 Port Monitor Resolution: 800 x 600 Intel Core i5 or AMD Athlon II 8 GB RAM Recommended: Windows 11 (64 Bit) Intel Core i9 or AMD Ryzen 16 GB RAM
Additional Software	.NET framework 4.7.2 or higher is required. An installer for .NET framework 4.7.2 is included in the full installer.

Version 3.25

Version 3.25
Description	This is a full installer for our control software for our OSA20xC and Redstone OSA305 instruments. It includes a "virtual device" mode ideal for evaluating the software. To include support for CCD spectrometers, please download the CCS installer.
Version	3.25
Filesize	324 MB
Download	Only download from trusted sources, like Thorlabs, and always scan files before executing.
Change Log
Additional	Please note: The 'Minimum System Requirements' listed below are sufficient for operating the software with a virtual device for evaluation purposes. The 'Recommended System Requirements' are strongly suggested for actual measurements.
System Requirements	Minimum: Windows® 7 SP1, 8, 10, or 11 (64 Bit) USB 3.0 Port Monitor Resolution: 800 x 600 Intel Core i5 or AMD Athlon II 8 GB RAM Recommended: Windows 11 (64 Bit) Intel Core i9 or AMD Ryzen 16 GB RAM
Additional Software	.NET framework 4.7.2 or higher and Java Runtime 1.6 or higher are both required. An installer for .NET framework 4.7.2 is included in the full installer.

Version 3.20

Version 3.20
Description	This is a full installer for our control software for our Redstone OSA. It includes a "virtual device" mode ideal for evaluating the software.
Version	3.20
Filesize	332 MB
Download	Only download from trusted sources, like Thorlabs, and always scan files before executing.
Additional	Please note: The 'Minimum System Requirements' listed below are sufficient for operating the software with a virtual device for evaluation purposes. The 'Recommended System Requirements' are strongly suggested for actual measurements.
System Requirements	Minimum: Windows® 7 SP1, 8, or 10 (64 Bit) USB 3.0 Port Monitor Resolution: 800 x 600 Intel Core i5 or AMD Athlon II 8 GB RAM Recommended: Windows 10 (64 Bit) Intel Core i9 or AMD Ryzen 16 GB RAM
Additional Software	.NET framework 4.5 or higher and Java Runtime 1.6 or higher are both required. An installer for .NET framework 4.5 is included in the full installer.

OSA Version 1.8 - for Windows^® XP

OSA Version 1.8 - for Windows® XP
Description	This software includes a GUI for control of the OSA, as well as a "virtual device" mode for evaluating the software prior to purchase. This software package is not compatible with our CCD spectrometers; contact techsupport@thorlabs.com for XP-compatible software.
Version	1.8
Filesize	320 MB
Download	Only download from trusted sources, like Thorlabs, and always scan files before executing.
Additional	Please note: The 'Minimum System Requirements' listed below are sufficient for operating the software with a virtual device for evaluation purposes. The 'Recommended System Requirements' are strongly suggested for actual measurements.
System Requirements	Minimum: Windows® XP or Newer (32 or 64 Bit) USB 2.0 Port Monitor Resolution: 800 x 600 Intel Pentium 4 or AMD 64 3000+ 2.0 GB RAM Recommended: Windows 7 (64 Bit) Intel Core i5 or AMD Athlon II 6.0 GB RAM
Additional Software	.NET framework 3.5 or higher and Java Runtime 1.6 or higher are both required.