Wasatch Photonics

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WP NIR OEM Spectrometer

Our development-ready WP NIR OEM spectrometer delivers the same high sensitivity as our standard product in an even more compact, robust footprint, backed by comprehensive engineering support.

  • Industry-leading, high efficiency optics
  • Patented VPH transmission gratings
  • Diffraction-limited design for better SNR
  • Excellent unit-to-unit reproducibility
  • Robust, thermally stable optical bench
  • Fiber coupled, free space & integrated laser models
  • ENLIGHTEN™ spectroscopy software – included!

Download full specifications    Download the OEM Products Brochure

At Wasatch Photonics, we’ve built a team that understands the unique needs of OEM customers, and a spectrometer bench that exceeds them. Our WP NIR OEM spectrometer is robust, compact, and easy to integrate, while delivering the same outstanding sensitivity and SNR of our standard products. It’s designed in transmission with diffraction-limited optics to remain aligned over temperature and at every wavelength, facilitating intensity matching to <10% across the spectrum, and powered by our free ENLIGHTEN™ spectroscopy software. Consistency is key when you’re designing a product to be built in the thousands, and we deliver – in performance, in expertise, and in the quality of our service. Contact us to discuss your application, or learn more about our OEM solutions.

WP NIR OEM Spectrometer Features/Benefits:

  • f/1.3 input to capture more light
  • High efficiency transmissive VPH gratings
  • >10x greater sensitivity & lower LOD
  • Low stray light and high signal to noise (SNR)
  • TEC cooling for best SNR
  • Fiber coupled or free space models
  • Compact, robust & configurable
  • Excellent thermal stability

We believe you should have full control and maximum flexibility when configuring your WP NIR OEM 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
Benefits Most cost effective option for quick measurements Fixed dark noise (better spectral reproducibility) Lowest dark noise option – highly consistent
Signal to noise Good SNR high throughput detector Improved SNR compared to ambient detector Best SNR for lowest limits of detection
Applications Best for teaching and lab environments Great for variable environments & handheld use Ideal for long integration time measurements


The WP NIR OEM spectrometer may be configured with your choice of slit size and sample coupling (fiber coupled or free space). Custom gratings to span your ideal range & resolution are available upon request. Call us to discuss your custom OEM needs!

  • f/#: 1.3
  • Max Diffraction Efficiency: N/A
  • Slit Height: 2 mm
  • Wavenumber Range: 900 - 1700 nm
  • Blocking/Sorting Filter: Options available, depending upon application
  • 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: 18.3 x 7.5 x 4.8 cm, 600 g

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

  • Detector Type and Model: Hamamatsu G9214-512SA InGaAs
  • Active Pixels: 512
  • Pixel Dimensions: 25 x 500 μm
  • Quantum Efficiency Max: 0.80 average / 0.97 peak photosensitivity
  • 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: -15°C
  • 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)
  • Software: ENLIGHTEN™ operating software & drivers (included)

Engineering Documents

  • WP NIR OEM Engineering Drawing (coming soon!) > Product dimensions, layouts, and position of mounting holes

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.