Compact two-channel spectrum analyzer S150 Duo

The S150 Duo two-channel spectrometer is designed for spectral analysis of electromagnetic radiation and precise wavelength measurements of lasers, including diode and tunable ones. The S150 Duo instrument is the best in its class with respect to the accuracy and reproducibility when measuring wavelengths, shapes and widths of spectral lines. S150 Duo is distinguished for its high resolution, long-term stability and possibility of spectral auto-calibration.

The S150 Duo spectrum analyzer from SOL instruments is a reliable, compact and easy-in-operation device with portable design. The software SpectraSP-L supplied with the spectrometer has an intuitive interface and provides data collection, display and analysis with maximum comfort.

You may also be interested in:

Help & Support

contact us

Description of compact two-channel spectrometer S150 Duo

Small-sized two-channel spectrum analyzer S150 Duo

The S150 Duo spectrometer is designed for spectral analysis of electromagnetic radiation, for precise wavelength measurements of lasers (including diode and tunable ones) used in spectral instruments and lidars. The S150 Duo is the best in its class of instruments: it delivers the accuracy and reproducibility when measuring wavelengths, shapes and widths of spectral lines. S150 Duo achieves both high spectral resolution (less than 9 pm) and wavelength accuracy of 1 pm. This all provides almost 100% reproducibility of the measurement results.

The S150 Duo spectrometer is a two-channel instrument. This feature in the design extends its consumer properties. S150 Duo can be successfully used in photometry if it is equipped with two identical gratings in each channel. The use of gratings with different groove density in each channel makes it possible to choose the registration bandwidth and spectral resolution. The diffraction gratings in both channels can be very accurately rotated using the adjusting screws, which allows you to set the required spectral ranges on the detectors.

In each channel of the spectrometer, linear multi-element detectors are installed. Both detectors is able to acquire spectra simultaneously. Each channel provides a 30 mm focal plane width. The input slits have a fixed size (the standard width is 25 μm). The input slit widths can be modified on customer request in the range of 15-40 μm.

Illumination of the spectrometer entrance slits is carried out by the use of a two-channel optical fiber (one input and two outputs) or two single-channel optical fibers. The lighting can be performed directly without optical fibers. In most cases, it is convenient to use one two-channel optical fiber, because often both channels complement each other and solve the same task. An example is the spectral characteristics measurement of laser lines. In one of the S150 Duo channels, an Echelle grating can be installed for this purpose. The user can mark with a marker the spectral line that is observed in the spectrometer channel where a conventional grating is located, and the software automatically finds the given line in another channel where there is a high-precision (Echelle) grating.

It is known that Echelle spectrometers can provide high-precision (up to 10 pm) wavelength measurements. The S150 Duo spectrometer with a new non-linear calibration sets higher limits for the accuracy of the wavelength measurement (from 5 pm to 1 pm, depending on the spectrum order) over a wide spectral range of 200-1100 nm.

The S150 Duo spectrometer is a small-sized device that does not have moving elements in its design, and it has high long-term stability. High-precision calibration along with long-term stability of the spectrometer are necessary for precise wavelength control. Calibration and wavelength measurement must be carried out under the same conditions to avoid temperature effects. However, the conditions in which wavelength calibration were performed may differ from the conditions in which the instrument is currently used. Therefore, there is a possibility of spectral auto-calibration in the S150 Duo, which can be performed by the user at any time. This achieves reproducibility of measurements results for the entire lifetime of the instrument.

The S150 Duo spectrometer is reliable, compact, with portable design, easy in operation. The software which is supplied with the device, provides collection, visualization and analysis of data. It has an intuitive interface.

Optical scheme of S150 Duo

Оптическая схема спектрометра S150 Duo

Features and advantages of S150 Duo

  • High spectral resolution (up to 9 pm). Measurement of shape and width of the spectral line.
  • High accuracy of wavelength determination (up to 1 pm).
  • Long-term stability. Small size.
  • The ability to accurately rotate the diffraction grating, followed by recalibration along the wavelength.
  • Automatic wavelength calibration. High accuracy and reproducibility of measurement results for the entire instrument lifetime.
  • Easy-to-use software, possibility to solve non-standard problems.

Application areas of spectrometer S150 Duo

  • Wavelength measuring of tunable lasers, analysis of the shape and width of the laser line.
  • Photometric measurements using S150 Duo as a two-channel spectrophotometer.
  • Measurement of fluorescent, Raman, and atomic-emission spectra.

Theory & Instructions:

Specification of two-channel spectrometers of S150 Duo series

Optical system

Optical scheme:vertical-symmetrical (two spectrometers in one housing)
F/number:1/9.3,
1/5 (with external condenser)
Focal length:158 mm
Mirror:spherical
Flat field:28.67 x 0.2 mm
Size of diffraction grating:15 x 15 х 3 mm
Spectral slit (entrance):25 x 600 µm
Light input:with optical fiber or external condenser
Overall sizes:200 х 143 х 72 mm
Weight:2.5 kg
  • Optical scheme: vertical-symmetrical (two spectrometers in one housing)
  • F/number: 1/9.3, 1/5 (with external condenser)
  • Focal length: 158 mm
  • Mirror: spherical
  • Flat field: 28.67 x 0.2 mm
  • Size of diffraction grating: 15 x 15 х 3 mm
  • Spectral slit (entrance): 25 x 600 µm
  • Light input: with optical fiber or external condenser
  • Overall sizes: 200 х 143 х 72 mm
  • Weight: 2.5 kg

Optical characteristics

Diffraction grating:600 l/mm1200 l/mm75 l/mm, Echelle
(200 nm, 120 order)
Spectral resolution, nm:< 0.3< 0.150.009
Registration band, nm:from 305 to 289from 151 to 119
Dispersion, nm/mm:from 10.44 to 10.06from 5.18 to 4.090.3
Wavelength accuracy, nm:< 0.04< 0.020.001

Grating 600 l/mm

  • Spectral resolution: less than 0.3 nm
  • Registration band: from 305 to 289 nm
  • Dispersion: from 10.44 to 10.06 nm/mm
  • Wavelength accuracy: less than 0.04 nm

Grating 1200 l/mm

  • Spectral resolution: less than 0.15 nm
  • Registration band: from 151 to 119 nm
  • Dispersion: from 5.18 to 4.09 nm/mm
  • Wavelength accuracy: less than 0.02 nm

Grating 75 l/mm, Echelle
(200 nm, 120 order)

  • Spectral resolution: 0.009 nm
  • Dispersion: 0.3 nm/mm
  • Wavelength accuracy: 0.001 nm

Note: The wavelength registration band shows the width of the spectral range simultaneously registered by a detector. Principally, a registration band is determined by width of a detector and by choice of a diffraction grating. The registration band gets narrow with increasing of line density. To a lesser extent, a registration band depends on a wavelength, but with increasing of line density this dependence is growing. The specification contains the maximum and minimum values of the registration band and dispersion which correspond to final (end) positions of gratings. For example, for the model with 600 l/mm grating the registration band 300 nm corresponds to the range of 200-468 nm and 289 nm corresponds to the range of 807-1065 nm. Thus, the registration band for this model can be selected in the spectral range 200-1070 nm.

Board-level digital camera

Optical sensor type:high sensitivity, CMOS 2*S13496
Number of active pixels:2*4096
Pixel size:7 µm x 200 µm
Spectral response:200 – 1070 nm
Max readout speed:software-driven 1; 2; 3 or 5 MHz
Exposure time:from 11 μs to 6 s (5 MHz)
Antiblooming:exists
Electronic shutter function:exists
Analog-digital converter (ABC):16 bit
Readout noise RSM:< 4.3 counts ADC (1 MHz); < 5 counts ADC (5 МHz)
Dynamic range:> 10000
Binning:1 x 2; 1 x 4
Synchronization:trigger IN and OUT, SHUTTER
  • Optical sensor type: high sensitivity, CMOS 2*S13496
  • Number of active pixels: 2*4096
  • Pixel size: 7 µm x 200 µm
  • Spectral response: 200-1070 nm
  • Max readout speed: software-driven 1; 2; 3 or 5 MHz
  • Exposure time: from 11 μs to 6 s (5 MHz)
  • Antiblooming: exists
  • Electronic shutter function: exists
  • Analog-digital converter (ABC): 16 bit
  • Readout noise RSM: less than 4.3 counts ADC (1 MHz); less than 5 counts ADC (5 МHz)
  • Dynamic range: greater than 10000
  • Binning: 1 x 2; 1 x 4
  • Synchronization: trigger IN and OUT, SHUTTER

Software SpectraSP-L

Spectrum visualization mode:separate / joint (one or two channels)
Scanning modes:single spectrum / multi-spectra
Scanning:continuous / set number of cycles
Accumulation type:summing / averaging
Peaks processing:search / width and intensity measurement / report
Spectra smoothing:yes
Photometry mode:transmission / absorption
Automatic calibration:yes
Wavelength measurement of 2nd and 4th harmonic of tunable lasers with Echelle help:optional
Signal integration in the set wavelength range:yes
Real-time wavelength measurement:yes
Data compatibility with MS Excel:yes
  • Spectrum visualization mode: separate / joint (one or two channels)
  • Scanning modes: single spectrum / multi-spectra
  • Scanning: continuous / set number of cycles
  • Accumulation type: summing / averaging
  • Peaks processing: search / width and intensity measurement / report
  • Spectra smoothing: yes

  • Photometry mode: transmission / absorption
  • Automatic calibration: yes

  • Wavelength measurement of 2nd and 4th harmonic of tunable lasers with Echelle help: optional
  • Signal integration in the set wavelength range: yes

  • Real-time wavelength measurement: yes

  • Data compatibility with MS Excel: yes

Optical fibers

Configuration:two-channel (1 input, 2 outputs); one-channel (1 input, 1 output)
Fiber material:UV silica
Core:200 µm
Length:Standard: 0.5 m; 1 m; 2 m. Any length is possible on request.
Numerical aperture:0.12
  • Configuration: two-channel (1 input, 2 outputs); one-channel (1 input, 1 output).
  • Fiber material: UV silica.
  • Core: 200 µm.
  • Length: standard of 0.5 m, 1 m, 2 m; any length is possible on request.
  • Numerical aperture: 0.12.

Dimensions of spectrometer S150 Duo

Dimensions of spectrometer S150 Duo

Registration of Raman spectra using the S150 Duo spectrometer

Spectrometer S150 Duo is an excellent solution for recording Raman spectra. Two channels of the device can be optimized for simultaneous operation with two lasers or for obtaining twice higher spectral resolution. When using input condensers the effective relative aperture increases, which significantly increases the sensitivity of the spectrometer.

Laser, nmGrating, L/mmSpectral range, сm⁻¹Spectral resolution, сm⁻¹
78560034204.10 – 3.89
78590024152.65 – 2.45
632.790036354.16 – 3.91
632.7120027953.03 – 2.78
532120039104.37 – 4.07
532180026002.72 – 2.44
488180031203.30 – 2.99
488240021952.26 – 1.95
405180045404.95 – 4.57
405240033553.51 – 3.13
  • Laser 785 nm, grating 600 L/mm: spectral range 3420 сm⁻¹, spectral resolution 4.10-3.89 сm⁻¹
  • Laser 785 nm, grating 900 L/mm: spectral range 2415 сm⁻¹, spectral resolution 2.65-2.45 сm⁻¹
  • Laser 632.7 nm, grating 900 L/mm: spectral range 3635 сm⁻¹, spectral resolution 4.16-3.91 сm⁻¹
  • Laser 632.7 nm, grating 1200 L/mm: spectral range 2795 сm⁻¹, spectral resolution 3.03-2.78 сm⁻¹
  • Laser 532 nm, grating 1200 L/mm: spectral range 3910 сm⁻¹, spectral resolution 4.37-4.07 сm⁻¹
  • Laser 532 nm, grating 1800 L/mm: spectral range 2600 сm⁻¹, spectral resolution 2.72-2.44 сm⁻¹
  • Laser 488 nm, grating 1800 L/mm: spectral range 3120 сm⁻¹, spectral resolution 3.30-2.99 сm⁻¹
  • Laser 488 nm, grating 2400 L/mm: spectral range 2195 сm⁻¹, spectral resolution 2.26-1.95 сm⁻¹
  • Laser 405 nm, grating 1800 L/mm: spectral range 4540 сm⁻¹, spectral resolution 4.95-4.57 сm⁻¹
  • Laser 405 nm, grating 2400 L/mm: spectral range 3355 сm⁻¹, spectral resolution 3.51-3.13 сm⁻¹

Diffraction gratings for compact spectrometers of S150 Duo series

We propose a wide range of ruled and holographic diffraction gratings (15 x 15 x 3 mm) for UV, visible and IR regions to be used in the spectrometers of S150 Duo series. Our specialists will help you to make a right choice of diffraction gratings for your tasks ensuring the best combination of high energetic efficiency and minimal stray light for different regions of a spectrum.

Дифракционная Grating спектрометра

Diffraction gratings of UV and visible range for S150 Duo: 15 x 15 x 3 mm

Line density, mm⁻¹Blaze wavelength, nmReciprocal linear dispersion, nm/mmSpectral range limited by detector sensitivity & the grating efficiency not less than 40%, nmSimultaneously registered spectral range, nm
24002702.49200 – 54070
18002703.41200 – 54095
18005003.11335 – 100085
12002805.2200 – 560145
12004005.12270 – 800140
12005005.03335 – 1000140
12006004.91400 – 1070135
12007504.67500 – 1070130
60028010.6200 – 560295
60035010.5235 – 700295
60065010.4435 – 1070290
60075010.3500 – 1070290
40028015.8200 – 560445
30035021.1235 – 700590
30050021.1335 – 1000590
30060021400 – 1070590
30070021470 – 1070590
20035031.7235 – 700890
20050031.6335 – 1000890
20070031.6470 – 1070890

Gratings with line density
2400 mm-1

  • Blaze wavelength = 270 nm; reciprocal linear dispersion = 2.49 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 200-540 nm; simultaneously registered spectral range = 70 nm.

Gratings with line density
1800 mm-1

  • Blaze wavelength = 270 nm; reciprocal linear dispersion = 3.41 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 200-540 nm; simultaneously registered spectral range = 95 nm.
  • Blaze wavelength = 500 nm; reciprocal linear dispersion = 3.11 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 335-1000 nm; simultaneously registered spectral range = 85 nm.

Gratings with line density
1200 mm-1

  • Blaze wavelength = 280 nm; reciprocal linear dispersion = 5.2 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 200-560 nm; simultaneously registered spectral range = 145 nm.
  • Blaze wavelength = 400 nm; reciprocal linear dispersion = 5.12 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 270-800 nm; simultaneously registered spectral range = 140 nm.
  • Blaze wavelength = 500 nm; reciprocal linear dispersion = 5.03 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 335-1000 nm; simultaneously registered spectral range = 140 nm.
  • Blaze wavelength = 600 nm; reciprocal linear dispersion = 4.91 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 400-1070 nm; simultaneously registered spectral range = 135 nm.
  • Blaze wavelength = 750 nm; reciprocal linear dispersion = 4.67 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 500-1070 nm; simultaneously registered spectral range = 130 nm.

Gratings with line density
600 mm-1

  • Blaze wavelength = 280 nm; reciprocal linear dispersion = 10.6 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 200-560 nm; simultaneously registered spectral range = 295 nm.
  • Blaze wavelength = 350 nm; reciprocal linear dispersion = 10.5 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 235-700 nm; simultaneously registered spectral range = 295 nm.
  • Blaze wavelength = 650 nm; reciprocal linear dispersion = 10.4 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 435-1070 nm; simultaneously registered spectral range = 290 nm.
  • Blaze wavelength = 750 nm; reciprocal linear dispersion = 10.3 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 500-1070 nm; simultaneously registered spectral range = 290 nm.

Gratings with line density
400 mm-1

  • Blaze wavelength = 280 nm; reciprocal linear dispersion = 15.8 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 200-560 nm; simultaneously registered spectral range = 445 nm.

Gratings with line density
300 mm-1

  • Blaze wavelength = 350 nm; reciprocal linear dispersion = 21.1 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 235-700 nm; simultaneously registered spectral range = 590 nm.
  • Blaze wavelength = 500 nm; reciprocal linear dispersion = 21.1 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 335-1000 nm; simultaneously registered spectral range = 590 nm.
  • Blaze wavelength = 600 nm; reciprocal linear dispersion = 21 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 400-1070 nm; simultaneously registered spectral range = 590 nm.
  • Blaze wavelength = 700 nm; reciprocal linear dispersion = 21 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 470-1070 nm; simultaneously registered spectral range = 590 nm.

Gratings with line density
200 mm-1

  • Blaze wavelength = 350 nm; reciprocal linear dispersion = 31.7 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 235-700 nm; simultaneously registered spectral range = 890 nm.
  • Blaze wavelength = 500 nm; reciprocal linear dispersion = 31.6 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 335-1000 nm; simultaneously registered spectral range = 890 nm.
  • Blaze wavelength = 700 nm; reciprocal linear dispersion = 31.6 nm/mm; spectral range limited by detector sensitivity & the grating efficiency not less than 40% = 470-1070 nm; simultaneously registered spectral range = 890 nm.

Echelle grating, 75 mm⁻¹

Wavelength, nmReciprocal linear dispersion, nm/mmSpectral resolution, nmWavelength accuracy, nm
2000.3020.0090.001
4000.6030.0180.002
6000.9050.0270.003
8001.2060.0360.004
10001.5080.0450.005
  • Wavelength = 200 nm; reciprocal linear dispersion = 0.302 nm/mm; spectral resolution = 0.009 nm; wavelength accuracy = 0.001 nm.
  • Wavelength = 400 nm; reciprocal linear dispersion = 0.603 nm/mm; spectral resolution = 0.018 nm; wavelength accuracy = 0.002 nm.
  • Wavelength = 600 nm; reciprocal linear dispersion = 0.905 nm/mm; spectral resolution = 0.027 nm; wavelength accuracy = 0.003 nm.
  • Wavelength = 800 nm; reciprocal linear dispersion = 1.206 nm/mm; spectral resolution = 0.036 nm; wavelength accuracy = 0.004 nm.
  • Wavelength = 1000 nm; reciprocal linear dispersion = 1.508 nm/mm; spectral resolution = 0.045 nm; wavelength accuracy = 0.005 nm.