Wavelength Meter

High-Resolution Wide-Rang Wavelength Meter


The SHR wavelength meter is an ideal low-cost high-precision wavelength meter for measuring laser wavelength in a large field of laser applications, as well as in the process of alignment and testing of solid-state lasers, diode lasers, dye lasers and OPOs.

Laser beam is directs to the SHR entrance slit either via a multimode optical fiber or directly, without any fibers. Multimode optical fiber fitted with a diffuse attenuator.

The SHR wavelength meter is not directly intended for analysis of plasma emission and other populated. However, the SHR can be applied in analysis of narrow spectral intervals within the spectral width from 0.5 nm in the UV spectrum range (190 nm) to 18nm in the IR (1200 nm), preliminarily separated with a filter or a Monochromator. The High-Aperture Short-Focus Monochromator ML44 can be used for this purpose.


  • High accuracy and wide spectral range
  • Capabilities of spectrum range
  • Can be used for Pulsed and CW lasers
  • Compact design; no movable components
  • Optical fiber input coupled with an attenuator


Option Value
Operation modes CW and Pulsed (externally triggered)
Spectral range 190 – 1100 nm
Absolute accuracy ± 3 pm
Spectral resolution(instrument function, λ/ΔλFWHM) 30 000 (from 6pm at 193nm to 40pm at 1200nm)
Source linewidth requirement ≤125 cm-1 (from 0.5nm at 193nm to 18nm at 1200nm)
Sensitivity < 0.5 µW at 632.8nm for min. exposure time of 7ms
Optical interface -optical fiber 400µm dia., 1000mm length,Connector SMA-905
-diffuse attenuator FA-3 equipped with SMA-905
Polarity Positive
Amplitude 3-15 V
Pulse duration FWHM 5-20 µs
Rise time ~10 µs
Computer Interface Full Speed USB
Software WLMeter


OPO Spectra λs=979.169nm, FWHM=0.605nm



Diode laser λcenter=655.25nm, FWHM<0.022nm



Wide-Range Infrared Wavelength Mater


The SHR-IR wavelength meter is an ideal instrument for measuring absolute wavelength value of Pulse and CW lasers and diodes in the spectral range from 600 nm to 1800 nm with accuracy better than ± 15 pm, as well as detecting FWHM of the analyzed line.

In respect of resolution and wavelength measuring precision the SHR-NIR is an alternative to a Monochromator-spectrograph with focal length not less than 500mm, equipped with an appropriate IR-detector.

But unlike the Monochromator, the SHR-NIR has no moving elements and provides real-time measurements without scanning. The SHR-IR is rigid, stable and accurate, ensures absolute reliability.

The SHR-NIR spectrometer is important in the process of adjustment, alignment and testing of laser systems operating in the near IR spectrum range.


  • Spectral range from 600 nm to 1800 nm
  • Accuracy better than ± 15 pm
  • Spectrum & FWHM analysis
  • Compact design; no moving components
  • Optical fiber input; diffuse attenuator
  • Ideal for measuring wavelength of Pulsed and CW lasers


Option Value
Operation mode CW and pulsed light (externally triggered)
Spectral range 600-1800 nm
Accuracy of wavelength detection ± 0.015 nm
Resolution (λ/Δλ, FWHM) 4000 (ΔλFWHM from 0.15nm for 600nm to 0.48nm for 1800nm)
Source linewidth requirements ≤125 cm-1 (from 4nm for 600nm to 40nm for 1800nm)
Optical interface -Quartz optical fiber dia. 400mm, 1m length,
SMA-905 connector
-Diffuse attenuator FA-3 with SMA-905 connector
Computer interface Full Speed USB interface
Polarity Positive
Amplitude 3-15 V
Pulse duration FWHM 5-20 μs
Rise time ~10 μs
Connector BNC-58
Software WLMeter

Spectrum: 1725-1750nm laser diode spectrum acquired with the SHR-IR

Spectrum- 1725-1750nm laser diode