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871 Series Laser Wavelength Meter

Fast, accurate, and reliable wavelength measurement for pulsed and CW lasers

More confidence in your experimental results

The 871 Series Laser Wavelength Meter uses a proven Fizeau etalon-based design to measure the wavelength of both pulsed and CW lasers that operate from 375 nm to 2.5 μm.

The model 871A is the most precise, measuring wavelength to an accuracy of ± 0.2 parts per million (± 0.0001 nm at 500 nm). For experiments that are less exacting, the model 871B is a lower-priced alternative with an accuracy of ± 0.75 parts per million (± 0.001 nm at 1500 nm).

Automatic calibration with a built-in wavelength standard guarantees this performance to ensure the most meaningful experimental results.

Fastest sustained measurement rate

The Fizeau etalons of the 871 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 871 Laser Wavelength Meter can measure the wavelength of every pulse of a laser that operates at repetition rates of ≤ 1 kHz. At higher repetition rates, the system integrates all laser pulses that arrive within the measurement window. In addition, the system’s time resolution of 1 ms provides the most detailed wavelength characterization of tunable lasers and fast feedback for laser wavelength stabilization.

Straightforward operation

The 871 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 871 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.

What’s more, a browser-based application can be used with a tablet or smartphone to display laser wavelength information anywhere in the laboratory.

  • Wavelength accuracy as high as ± 0.0001 nm
  • Fast, sustained measurement rate up to 1 kHz
  • Automatic calibration with built-in wavelength standard
  • Operation available from 375 nm to 2.5 μm
  • Convenient pre-aligned fiber-optic input
  • Asynchronous operation with automatic pulse detection
  • Straightforward operation with PC using
    USB or Ethernet
  • Display software provided to control measurement parameters and report
    wavelength data
  • Built-in PID controller for precise laser stabilization
  • Automatic data reporting using custom or LabVIEW programming eliminates the need for a dedicated PC
  • Convenient tablet/smartphone application reports measurement data anywhere in the laboratory
  • 5-year warranty covers all parts and labor

Choose from a selection of convenient accessories for operation with optical fiber.

Connect up to eight lasers to the model 871 with our fiber-optic switches.