High-Accuracy Laser Wavelength Meter - The model 621A is offered for the most demanding experiments, measuring absolute wavelength to the highest accuracy of ± 0.2 ppm.
Two versions of the 621 series are available. For experiments that are less exacting, the model 621B is a lower-priced alternative.

• Accuracy ± 0.2 ppm for 621A Model
• Accuracy ± 0.75 ppm for 621B Model

The best way to determine the absolute wavelength of pulsed lasers and OPOs is with the 821 Pulsed Laser Wavelength Meter.
This system provides real-time laser wavelength information with an accuracy that is guaranteed by automatic calibration with a built-in wavelength standard. The result is the reliable accuracy that is required for the most demanding applications.

• Operates with pulsed and CW lasers, and OPOs.
• Absolute wavelength accuracy of ± 0.02 cm-1.
• Operation from 350 to 1100 nm or 630 to 1700 nm.
• Measurement rate of 200 Hz provides instantaneous wavelength information.

Model 621B-MIR Laser Wavelength Meter is the only way to accurately measure the absolute wavelength of CW lasers that operate in the mid-infrared (4-11 μm).

• Absolute wavelength accuracy of ± 1 part per million.
• Built-in wavelength standard for continuous calibration.
• Operates from 4.0 to 11.0 μm.
• Easy to integrate into experiment for automatic wavelength reporting and control.

Low Cost Laser Wavelength Meter - 521 Serie: is a compact system that provides accurate laser wavelength measurement, and is offered at a very attractive price.

• Measures absolute w avelength to ±10ppm
  
• Built-in reference for continuous calibration
  
• Measurement rate of 10 Hz
  
• Wavelength coverage from 350nm to 1.7μm
  
• Convenient, pre-aligned optical fiber input (GHz)
  
• USB interface for easy integration into experiment

The 721 series Laser Spectrum Analyzer provides the most complete spectral characterization of both CW and high-repetition rate pulsed lasers that operate in the visible to infra red spectrum.

It combines proven Michelson interferometer-based technology with advanced digital processing techniques for accurate measurement of absolute laser wavelength and high resolution laser spectral analysis. Every measurement is guaranteed by continuous calibration with a built-in wavelength standard resulting inaccuracy that is required for the most demanding applications.

• Wavelength measurement and spectral analysis with one instrument
• Absolute wavelength accuracy of ±0.2 part per million (ppm) (721A)
• Spectral resolution as high as 2GHz
• Operates from 350nm to 5.0µm
• Input power requirement as low as 5µW
• Displays wavelength, wavenumber or frequency
• Convenient pre-aligned fibre-optic input or free-space aperture for IR wavelengths
• Straight forward operation with PC using high-speed USB interface

The 721B-MIR Laser Spectrum Analyzer provides the most complete spectral characterization of both CW and high-repetition rate pulsed lasers that operate in the mid-infrared spectrum.

The model 721B-MIR combines proven Michelson interferometer-based technology with advanced digital processing techniques for accurate measurement of absolute laser wavelength and high resolution laser spectral analysis. Every measurement is guaranteed by continuous calibration with a built-in wavelength standard resulting inaccuracy that is required for the most demanding applications.

• Wavelength measurement and spectral analysis with one instrument
• Absolute wavelength accuracy of ±1 part per million (ppm)
• Spectral resolution as high as 2GHz
• Operation over the entire range of 4.0µm to 11.0µm
• Input power requirement as low as 0.3mW
• Displays wavelength, wavenumber or frequency
• Visible tracer beam facilitates alignment
• Straight forward operation with PC using high-speed USB interface