621 Series - Laser Wavelength Meter
Bristol Instruments
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 (± 1 ppm for MIR and XIR)for 621B Model
- Operation available from 375 nm to 12 μm
621B-MIR Laser Wavelength Meter
Bristol Instruments
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.
821 Pulsed Laser Wavelength Meter
Bristol Instruments
The model 821B pulsed laser wavelengthmeter measures absolute wavelength to an accuracy of ± 0.02 cm-1 over the range of 350-1100 nm or 630-1700 nm.
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.
521 - Laser Wavelength Meter - Low Cost
Bristol Instruments
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 CW laser wavelength to an accuracy as high as ± 0.005 nm.
- Built-in reference for continuous calibration
- Measurement rate as high as 10 Hz.
- Operation available from 400nm to 1100nm or 500nm to 1700nm
- Convenient, pre-aligned optical fiber input (GHz)
- Input power requirement as low as 5 uW.
Fibre Optic Components 
