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Fiber Optic Spectrometers Enhanced NIR Spectrometers

OCTW-NIRPro
OCTW-NIRMini

Near Infrared Spectrometer - NIRPro/NIRMini

DETAIL

NIR Series is a thermoelectrically cooled (TE-cooled) near-infrared fiber optic spectrometer, available in two models: NIRPro (high-resolution) and NIRMini (high-sensitivity).

Featuring a compact design, the spectrometers support configurable spectral ranges with resolution up to 0.3 nm and low stray light (~0.5%). The wavelength range is adjustable within 900–2500 nm, and the cooling temperature can reach as low as –25 °C. The spectrometer delivers excellent spectral response stability and repeatability, making it suitable for laser measurements and near-infrared applications.

 

  • Features

NIRPro features high optical resolution, achieved through a specialized optical design and manufacturing process, making it ideal for applications requiring fine spectral analysis.

NIRMini offers high sensitivity, enabling effective detection of weak signals, and performs especially well in Raman signal detection, making it suitable for precise spectral measurements.

Both spectrometers share the following features:
  • Low noise: Optimized circuit design reduces readout noise and supports longer integration times.
  • High-speed acquisition: Designed with high-speed circuitry, achieving up to 3200 frames per second, suitable for fast data collection applications.
  • High stability: Equipped with a cooling design that ensures excellent long-term operational stability and consistent data acquisition, ideal for continuous measurement tasks.
  • Compatible with Oceanhood’s dense multi-core bundled optical fibers, with fiber connection strength consistency ≤ 7%.
  • Multiple communication interfaces: Includes USB, serial ports, and a 24-pin I/O interface, along with proprietary DAC and ADC modules to enable, control, and monitor the intensity and power of paired light sources.

 

  • Specifications

Product NIR series
NIRPro
(High resolution)		 NIRMini
(High sensitivity)
Dimensions 189×115×54.5mm 128×106×54mm
Weight ≈1.25KG ≈0.85KG
Optical parameters
Optical fiber interface Key-SMA905
Slit 10μm、20μm、25μm、50μm、100μm、200μm
(customizable)
Detector InGaAs detector
Stray light ~5%
Consistency of optical fiber insertion and removal ≤7%
Function parameters
AD sampling 16bit
Data interface USB2.0、RS232
Extended function interface 24PIN
Acquisition mode Single, continuous, software trigger, synchronous external trigger, asynchronous reset external trigger
Detector integration time

100 µs-30 s (λ-1700nm)

100 µs-50 ms (λ-2500nm)

100 µs-50 ms (λ-2200nm)
CCD read noise1 ≤8
Spectral dynamic range2 15000:1
CCD dynamic range3

≥15000:1
(~1700nm full signal)

≥10000:1 (~2200nm full signal)

≥7500:1 (~2500nm full signal)
Signal-to-noise ratio4 2000:1
Signal to noise ratio (full signal)5 ≥13000:1
Response linearity6 ≥98%
Others
Operating temperature 0℃~40℃
Working humidity 20%-85%
1. CCD readout noise: minimum integration time, root mean square of CCD readout noise.
2. Spectral dynamic range: CCD dynamic range is the standard deviation of the minimum integration time, (saturation value – dark noise baseline) / CCD readout noise, the evaluation method refers to the Oceanhood’s standard.
3. CCD dynamic range: the dynamic range of the CCD detector at full signal.
4. Signal-to-noise ratio: in accordance with the evaluation method of Oceandhood’s standard of the actual value of the observations.
5. Signal-to-noise ratio (full signal): the theoretical value of the reference CCD manufacturers and peer evaluation methods.
6. Response linearity: before calibration.
 
 
 

  • Products

    NIRPro - High resolution
    Model

    Cooling

    temperature    		 Spectral Range Spectral resolution
    °C
    		 Start End
    10um
    25um
    100um
    NIRPRO-950-1700
    -15
    		 950 1700 -
    5
    		 7
    NIRPRO-1230-1370
    -15
    		 1230 1370 0.4
    -
    		 -
    NIRPRO-1527-1572
    -15
    		 1527 1572 0.4
    -
    -

    NIRMini - High sensitivity
    Model

    Cooling

    temperature    		 Spectral Range Spectral resolution
    °C
    		 Start End
    10um
    25um
    100um
    NIRMini-950-2500
    -25
    		 950 2500 -
    8
    		 -
    NIRMini-1000-2200
    -25
    		 1000 2200 4.5
    		- -
►The actual spectral resolution does not exceed 120% of the specified value.
►The spectrometer can be customized according to customer requirements, including spectral range, resolution, and other parameters.


 
 
 

  • Dimensional drawing

NIRPro - High resolution



NIRMini - High sesentivity


 

  • Applications

  • Thickness Measurement
  • Water Content Testing
  • Pharmaceutical industry


 

  • Testing results

Dark spectrum (950-1700 nm)



Argon light spectrum (950-1700 nm)



Argon light spectrum vs temperature (950-1700 nm)



Tungsten light spectrum (950-1700 nm)



Solar radiation spectrum (950-1700 nm)



Typical dark noise vs integrated time 



10ms integrated time signal to noise ratio (active)




Dynamic range




Xenon lamp spectrum (950-2500 nm)




Tungsten light spectrum (950-2500 nm)

 

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