PRO8 Modular Optical Switch Modules

  • Very Fast Response Time: 0.5 ms Typ., 1 ms Max
  • Low Insertion Loss: Typ. 0.7 dB (1x2), Max. 1.5 dB (1x4)
  • Excellent Repeatability of ±0.01 dB
  • Four Modules: 1x2, 1x4, 1x8, & 2x2

PRO800 with
Optical Switches



Related Items

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PRO8 Series Optionsa
Laser Diode Current Controllers (Up to 8 A) PRO8000 Chassis with Modules
TEC Temperature Controllers (Up to 64 W)
Combination Laser Diode Current (Up to 1 A) &
TEC Temperature Controllers (Up to 16 W)
DWDM DFB Laser Modulesb
Optical Switches
Photocurrent Measurement Modules
  • Our PRO8 Series Chassis can accommodate multiple PRO8 Series Modules, allowing for a customized telecom solution.
  • Please contact Tech Support for availability of desired wavelength.


  • Operating Wavelength: 1240 - 1610 nm
  • Switching Time: <1 ms
  • MEMS-Based Fiber Optic Switches
  • Four Switching Configurations: 1 x 2, 1 x 4, 1 x 8, or 2 x 2
  • LabVIEW™ and LabWindows™/CVI Drivers
  • All Models Occupy 1 PRO8 Slot

The OSW8000 Series Optical Switches are MEMS (microelectromechanical system) based plug-in modules for the PRO8 platform. They provide additional “building-blocks” when constructing automated optical test networks. Four different bidirectional switching modules are available, providing highly flexible routing of optical signals.These bidirectional switches have a typical switching time of 0.5 ms, and a broad wavelength range of 1240 nm to 1610 nm. The four different modules provide 1 x 2, 1 x 4, 1 x 8, and 2 x 2 switches with low insertion loss and repeatability of ±0.01 dB.

MEMS Technology for Long Lifetime
The switching mechanism is based on silicon MEMS technology which ensures very long lifetime and is inherently fast. This technology also provides very low crosstalk between channels; the 1 x 4 and 1 x 8 switches have a maximum crosstalk specification of -60 dB. The 1 x 2 and 2 x 2 are both rated at -50 dB.

User-Friendly Controls
The display menu of the PRO8 chassis allows configuration of any OSW8000 module. The operational parameters are easily accessed using mneumonic symbols, and simple prompts provide user-friendly operations.

For further information, please contact Tech Support.

Item # OSW8102 OSW8104 OSW8108 OSW8202
Switching Configuration 1 x 2 1 x 4 1 x 8 2 x 2
Switching Time 0.5 ms Typical (1 ms Max)
Wavelength Range 1240 to 1610 nm
Input Power (Max) +17 dBm
Insertion Loss (Typical/Max)a 0.7 dB / <1.5 dB 1.2 dB / <2.1 dB 1.6 dB / <2.6 dB 0.7 dB / <1.5 dB
PDL (1550 nm) <0.1 dB <0.15 dB <0.2 dB <0.15 dB
Crosstalk <-50 dB <-60 dB <-60 dB <-50 dB
Repeatability ±0.01 dB
Return Loss -50 dB -50 dB -45 dB -50 dB
Connectors FC/APC; Others Upon Request
General Data
Operating Temperature 0 to 35 °C
Storing Temperature -10 °C to +60 °C
Module Width 1 PRO8 Slot
  • Including Connectors

The following parts are included together with each of our OSW8000 Series Optical Switch Modules:

  • 1 OSW8000 Series Optical Switch Module
  • Operating Manual

Posted Comments:
user  (posted 2022-09-19 18:51:06.527)
Is there any data on lifetime of these switches? How many cycles do the MEMS switches have before they fail?
wskopalik  (posted 2022-09-21 05:21:55.0)
Thank you very much for your feedback! These optical switches generally do not show any wear out. They are proven to work for up to 10^9 switching cycles. I will contact you directly to provide further assistance.
jhartmann  (posted 2009-07-09 11:15:58.0)
A response from Juergen at Thorlabs to icsmith : Yes, WL other than the specified telecomm WL range are available as a custom special. For the PRO8 chassis system are 1x2, 2x2, 1x4 and 1x8 configurations available - what switch configuration you need?
icsmith  (posted 2009-07-06 11:58:02.0)
The fiber optic switch modules and chassis specs say thay are limited to >1200nm but the individule switched are available at 980nm. Can you get a chassis using the 980nm switches?

PRO8 Optical Switch Modules

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
OSW8102 Support Documentation
OSW8102PRO8 Series Optical Switch, 1 x 2 MEMS, FC/APC, 1 Slot Wide
OSW8104 Support Documentation
OSW8104PRO8 Series Optical Switch, 1 x 4 MEMS, FC/APC, 1 Slot Wide
Lead Time
OSW8108 Support Documentation
OSW8108PRO8 Series Optical Switch, 1 x 8 MEMS, FC/APC, 1 Slot Wide
Lead Time
OSW8202 Support Documentation
OSW8202PRO8 Series Optical Switch, 2 x 2 MEMS, FC/APC, 1 Slot Wide