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TOPAG Lasertechnik GmbH
Nieder-Ramstädter Str. 247
64285 Darmstadt
Telefon: +49 6151 4259 78
Telefax: +49 6151 4259 88 
E- mail: info [at] 

SHR IR - wavemeter

SHR IR - wavemeter


The SHR-IR is an Echelle wavemeter with outstanding wavelength accuracy of ±15pm (1:4000) and within a large infrared wavelength range from 600-1800nm. It is the ideal high-precision instrument for measuring laser wavelengths and linewidths. The SHR-IR is fiber-coupled, does not contain any movable parts, is powered from USB and comes with a user-friendly software for measurement and online monitoring.


Bezeichnungen der Tabs

  • Description
  • Specifications
  • Spectrum
  • Pictures
Tab 1


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

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

Apart from wavelength measuring the SHR-IR provides demonstration of analysed spectra with resolution of 4 000 (λ/Δλ, FWHM) which constitutes from 0.15nm for 600nm to 0.5nm for 1800nm. The SHR-IR also ensures on-line monitoring of the above values in the process of tuning the analysed wavelength.

The instrument does not contain any moving elements; powering and control are performed from a computer via the Full-Speed USB interface. Analysed light is steered to the entrance slit either via a multimode optical fiber with a diffuse attenuator (included in the delivery set) or directly, without any fibers.

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 and has more reasonable price.

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

Tab 2
Option Value
Operation mode CW and pulsed light (externally triggered)
Spectral range, nm 600-1800
Accuracy of wavelength detection, nm ± 0.015
Resolution (l/DlFWHM) 4 000 (ΔλFWHM from 0.15nm for 600nm to 0.48nm for 1800nm)
Source linewidth requirements, not more than ≤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
Requirements to external trigger pulse (for pulsed lasers)  
- polarity Positive
- amplitude, V 3-15
- pulse duration FWHM, μs 5-20
- rise time, μs ~10
- connector BNC-58
Software WLMeter
Dimensions, mm 142 x 110 x 80
Weight, kg 1.2


Tab 3
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SHR-IR Spektrum 1 

Optical parametric oscillator (OPO). Idler wave. Real-time measurements at tuning laser wavelength

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SHR-IR Spektrum 2 

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

Tab 4

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Tab 5
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SHR-IR Product 
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