Wasatch Photonics

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WP NIR I Spectrometer

Optimize this high sensitivity, TEC-cooled spectrometer with our build-to-print  resolution and sample coupling options.

  • 900-1700 nm wavelength range
  • Benchtop quality data, “compact” price
  • Up to 30x faster measurements
  • Superior stray light suppression, high SNR
  • Trace-level limit of detection
  • High thermal stability & reproducibility
  • Fiber-coupled & free space models
  • ENLIGHTEN™ spectroscopy software – included!
Download full specifications

We believe you should have full control and maximum flexibility when configuring your spectrometer. That’s why we offer so many build-to-print options for range, resolution, detector cooling, and sample coupling – backing each with our advice and experience. Learn more about each below, or contact us to discuss the best options for your application.

SLIT WIDTH: Defining Resolution

Sensitivity and resolution are competing factors when choosing slit size. A larger slit allows more light to enter the spectrometer, increasing sensitivity for low-light applications such as fluorescence. Resolution improves, however, as slit width is reduced (though not always linearly). We offer 10, 25, and 50 μm slits for many of our spectrometers, and can advise on the best choice for your application. Due to the high sensitivity of our low f/# spectrometer designs, it is often possible to use a smaller slit width than would be required with a typical f/4 spectrometer, allowing you to achieve higher resolution.

SAMPLE COUPLING: Fiber, free-space, or integrated laser?

How you interface with your Raman sample depends not only on whether you value convenience or configurability, but also on the data quality you require.  See below for some quick tips, or reach our sample coupling tech note to learn how to get more out of our many sample coupling & configuration options.

Fiber coupled spectrometer & probe

Our f/1.3 design delivers superior signal and ultra low background when used with our matched NA probes. Simplifies sample alignment in the lab or field.

Free-space coupling to spectrometer

This 0.36 NA input offers superior signal & freedom in the design of your own sampling optics, from spot size to working distance. Ideal for research & OEMs.

Integrated laser & free-space coupling

Our compact design integrates laser control and optimized coupling optics for best signal to noise. For turnkey lab use & OEM integration.

DETECTOR COOLING: Controlling noise

Detector Cooling Options

We offer ambient, regulated, and TEC cooled detectors, allowing you to balance your required signal to noise ratio (SNR) and temperature stability with cost for the best possible value.

An uncooled detector is often adequate for many basic spectroscopy applications, but for lowest limit of detection and long term measurements, a thermoelectrically cooled (TEC) detector delivers unparalleled performance. Contact us to discuss the right choice for your application.




Detector temperature~ 25°C~ 10°C~ -15°C
BenefitsMost cost effective option for quick measurementsFixed dark noise (better spectral reproducibility)Lowest dark noise option – highly consistent
Signal to noiseGood SNR high throughput detectorImproved SNR compared to ambient detectorBest SNR for lowest limits of detection
ApplicationsBest for teaching and lab environmentsGreat for variable environments & handheld useIdeal for long integration time measurements


Spectrometer may be configured with your choice of slit size and sample coupling (fiber coupled or free space). Custom wavelength range models are available upon request, so call us to discuss your OEM needs!

  • f/#: 1.3
  • Slit Height: 2 mm
  • Spectral Range: 900 - 1700 nm
  • Resolution, 25 um slit: 5 nm
  • Resolution, 50 um slit: 6 nm
  • Fiber Port: SMA 905 (fiber coupled model) ; free space coupled model available
  • Size: 16.5 x 12.7 x 5.1 cm

We’ve maximized the efficiency of our spectrometers to give you more sensitivity, better SNR, and faster measurements in a compact footprint. Collect more light with our f/1.3 input, keep more light with our patented high transmission VPH gratings & diffraction-limited optics, and detect more light with scientific-grade detectors. When tested side by side, our spectrometers consistently outperform larger, more expensive units. From sample coupling to detector cooling, we give you more options to get the exact performance you need, powered by our free ENLIGHTEN™ spectroscopy software.

Call us to discuss your application!

WP NIR I Spectrometer Features/Benefits:

  • Wavelength range is 900 - 1700 nm
  • f/1.3 input to capture more light
  • High efficiency transmissive VPH gratings
  • Low stray light and high signal to noise (SNR)
  • TEC Cooled InGaAs array with low noise electronics
  • Fiber coupled or free space models
  • Compact, robust & configurable
  • Excellent thermal stability
  • OEM models available

All WP NIR I spectrometers employ a TEC cooled detector for best signal to noise and temperature stability.

  • Detector Type and Model: Hamamatsu G9214-512S InGaAs array
  • Active Pixels: 512
  • Pixel Dimensions: 25 x 500 μm
  • Quantum Efficiency Max: 82% average / 84% peak
  • Integration Period Range: 1 ms - 60 s
  • Signal to Noise: 2400:1
  • Dynamic Range System: 16,666
  • Read Noise: 180 e- RMS
  • Optional Regulated Detector: TEC cooling to -15°C on all units
  • Regulated Detector Temperature Stability: ± 0.1 °C
  • Cooling Controls: ON/OFF/LOCK
  • System Operating Temperature Range: 0°C to 40°C, non-condensing
  • Data Interface: USB 2.0 Type B connector (female)

Brochures & Product Sheets

Tech Notes

  • Why Wasatch for Spectroscopy? > See the data to validate our faster measurements, low LOD, high SNR, and excellent mechanical stability.
  • The Wasatch Advantage > Explore the optical design of our spectrometers and their performance benefits.
  • Why Wasatch for NIR > See the data to back up our superior sensitivity, LOD, speed, and thermal stability in the NIR.