872 Series Laser Wavelength Meter

The 872 Laser Wavelength Meter measures the wavelength of both CW and pulsed lasers that operate from 375 to 1700 nm. The 872 system’s accuracy is ± 0.2 parts per million (± 60 MHz at 1000 nm) and its frequency resolution is better than 1 part per billion (300 kHz at 1000 nm). Automatic calibration with a built-in wavelength standard guarantees this performance to ensure the most meaningful experimental results.

The Fizeau etalons of the 872 Laser Wavelength Meter generate a spatial interferogram that is detected by a fast photodetector array. An on-board digital signal processor quickly converts the interferometric data to wavelength. Because this calculation is done within the instrument, a sustained measurement rate as high as 1 kHz is achieved.

The 872 Laser Wavelength Meter operates with a PC connected directly by USB or through a local area network via Ethernet. Software is provided to control measurement parameters and to report wavelength data.

Since wavelength is calculated using an on-board digital signal processor, the 872 Laser Wavelength Meter can be integrated directly into an experiment using a library of commands for custom or LabVIEW programming. This eliminates the need for a dedicated PC and enables the use of any operating system.

The model 872 includes a built-in Proportional-Integral-Derivative (PID) Controller that provides the ability to actively regulate the frequency of a laser. The 872 system can also be combined with the Bristol Instruments MLC Series Multi-Laser PID Controller and FOS Fiber-Optic Switch to monitor and stabilize as many as eight lasers.

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