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Bristol 228 Optical Wavelength Meter

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Bristol 228 Optical Wavelength Meter

Reliable accuracy ensures greater confidence in your DWDM wavelength test results

Bristol Instruments

The 228 Series Optical Wavelength Meter uses proven interferometer-based technology to measure the wavelength of CW lasers to the highest accuracy available. This performance is maintained over long periods of time with continuous calibration using a built-in wavelength standard. What's more, features such as short measurement time, straightforward operation, and rugged design satisfy the needs of both the R&D scientist and the manufacturing engineer.


  • Optical wavelength measured to an accuracy as high as +/- 0.3pm
  • Continuous calibration with built-in wavelength standard
  • Measurement confidence level of >99.7%
  • Simultaneous measurement of total optical power to accuracy of +/-0.5dB
  • Operation from 700 to 1650nm
  • Measurement rate of 10Hz for reduced testing times
  • High sensitivity of -30dBm (1µW) with automatic electronic gain control
  • Convenient front-panel display reports measurement data in a variety of formats
  • Inetrfacing via SCPI using USB, Ethernet or GPIB
  • Rugged design for manufacturing environments

Download the datasheet or contact us for more information.

Wavelength Range700 - 1650 nm (182-429 THz)
Wavelength Accuracy+/- 0.3 pm
+/- 0.3pm @ 1550nm
+/- 1.0 pm
+/- 1.2pm @ 1550nm


       228 Datasheet                                                  Read more on Bristol's website