Single Channel Detectors

HORIBA Scientific offer two types of single channel detectors for use with scanning spectrometers - Photomultiplier Tubes (PMT) and Solid State Detectors. For multichannel applications with spectrographs, a range of CCD Detectors is available. We also offer Lock-in Amplifier Controllers.

The Photomultiplier Tube (PMT) Detector

PMT detectors typically offer much higher sensitivity than solid state detectors and operate effectively in the UV/VIS and NIR. However, typically their spectral coverage is limited to about 950 nm. PMT detectors also require high voltage power supplies.

The PMT detectors offered by HORIBA Scientific are high quality PMTs in ambient or water cooled housings and head-on or side-on configurations.

Model PMT Type, Cooling & Housing Spectral Range Notes
1911 (F or G) R928 multi-alkali PMT Ambient cooled Side window housing 190-860 nm Requires HV source between 200-1200V
1914 (F or G) R928 multi-alkali PMT Water / TE cooled Side window housing 190-860 nm Requires HV source and can go to 1500V. Use current input or photon counting. Also includes 1630C field lens adapter.

Solid State Detectors

Solid state detectors are opto-electronic devices used to convert incident photons to electronic signals. Available with wavelength ranges from below 200 nm to beyond 20 µm, solid state detectors offer sensitivity, dependability, cost and efficiency.

HORIBA Scientific has a large number of solid state detectors that cover any application. They are available as ambient, thermoelectric, or liquid nitrogen cooled depending on your sensitivity needs.

Solid state detectors can be divided into three classes: photoemissive, photoconductive and dual color.

Photoemissive detectors are fast, sensitive detectors which generally do not require lock-in amplifiers and choppers except for low-light applications where a chopper and lock-in are recommended. Their upper spectral range is limited to about 5µm.

Photoconductive detectors are slower and not as sensitive but are available up to 12 µm or beyond. A chopper and lock-in are required with photoconductive detectors.

Dual Color detectors are sandwich detectors with usually a silicon detector in front and a second detector behind. The silicon operates up to 1.1 µm above which it becomes transparent and the second detector cuts in. Detector efficiency of the silicon drops by about 40%, the second detector efficiency remains the same. Dual color detectors incorporating PbS and PbSe require a chopper and lock-in amplifier which are also recommended for rest.

To maximize the sensitivity of the solid state detectors, we offer an Infrared Detector Housing for use with all the DSS detectors. The housing includes an elliptical mirror which concentrates the signal at a 6:1 ratio on a 90 degree beam path. By using mirror optics, the energy is at focus on the detector at all wavelengths.

Photoemissive Detectors

Type Cooling Spectral Range NEP Notes
Silicon (Si) Uncooled 0.2 - 1.1 µm - Unamplified. Large area 10 x 10 mm. NEP determined by analogue input
Germanium (Ge) Uncooled 0.8 - 1.8 µm 7 x 10-13 Preamplified. Requires ±15V
Germanium (Ge) TE Cooled 0.8 - 1.75 µm 5 x 10-14 Preamplified. Requires ±15V
Germanium (Ge) LN cooled 0.8 - 1.5 µm 2.5 x 10-15  
Indium Gallium Arsenide (InGaAs) Uncooled 0.8 - 1.7 µm 6 x 10-14 Preamplified. Requires ±15V
Indium Gallium Arsenide (InGaAs) TE Cooled 0.8 - 1.65 µm 1 x 10-14 Preamplified. Requires ±15V
Indium Gallium Arsenide (InGaAs) LN Cooled 0.8 - 1.6 µm 1 x 10-15 Preamplified. Requires ±15V
Indium Arsenide (InAs) Uncooled 1 - 3.6 µm 2 x 10-10 Preamplified. Requires ±15V
Indium Arsenide (InAs) TE Cooled 1 - 3.55 µm 1 x 10-11 Preamplified. Requires +/-15V

Photoconductive Detectors

Type Cooling Spectral Range NEP Notes
Lead Sulphide (PbS) Uncooled 1 - 3 µm 2 x 10-12 Preamplified. Requires ±15V. Chop speed 100-500Hz
Lead Sulphide (PbS) TE Cooled 1 - 3 µm 1 x 10-12 Preamplified. Requires ±15V. Chop speed 100-500Hz
Lead Selenide (PbSe) TE Cooled 1 - 5 µm 2 x 10-11 Preamplified. Requires +/-15V. Chop speed 1KHz
Mercury Cadmium Telluride (HgCdTe) TE Cooled 1 - 5 µm* 1 x 10-11 Preamplified. Requires ± 15V. Chop speed 1KHz. *Wavelength response can be modified with loss in range.
Mercury Cadmium Telluride (HgCdTe) TE Cooled 1 - 10 µm* 1 x 10-8 Preamplified. Requires ± 15V. Chop speed 2KHz - 10KHz. *Wavelength response can be modified with loss in range.
Mercury Cadmium Telluride (HgCdTe) LN Cooled 1 - 14 µm* 6 x 10-12 Preamplified. Requires ±15V. Chop speed 2KHz - 14KHz. *Wavelength response can be modified with loss in range.
Mercury Cadmium Telluride (HgCdTe) LN Cooled 1 - 20 µm* 2 x 10-11 Preamplified. Requires ±15V. Chop speed 2KHz - 20KHz. *Wavelength response can be modified with loss in range.

Dual Color Detectors

Type Cooling Spectral Range Notes
Si/InGaAs Uncooled 0.3 - 1.7 µm Preamplified. Requires ±15V
Si/InGaAs TE Cooled 0.3 - 1.65 µm Preamplified. Requires ±15V
Si/Ge TE Cooled 0.3 - 1.75 µm Preamplified. Requires ±15V
Si/PbS TE Cooled 0.3 - 3 µm Preamplified. Requires ±15V
Si/PbSe TE Cooled 0.3 - 5 µm Preamplified. Requires ±15V
Si/InAs Uncooled 0.3 - 3.6 µm Preamplified. Requires ±15V
Si/InAs TE Cooled 0.3 - 3.55 µm Preamplified. Requires ±15V

Contact us for additional options.

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