Optoelectronics

Pyroelectric detectors for infrared spectrometers

3rd November 2017
Alice Matthews

Manufacturer of Deuterated L-Alanine doped Triglycine Sulphate (DLaTGS) pyroelectric detectors for infrared spectrometers, LASER COMPONENTS, supplies customers all over the world with these industrial grade detectors from its research and production facility in Florida. DLaTGS has several advantages over standard TGS, the material is doped with deuterium to raise the Currie temperature to 61°C, while doping with L-alanine prevents permanent depoling after excursions above the Currie temperature.

The company claims that these features make DLaTGS one of the highest performing pyroelectric materials available today.

The devices are manufactured in standard TO style packages that can be fitted with a range of windows including CaF2, KBr, BaF2 and ZnSe-Ar. Thermoelectric coolers can also be supplied in TO-99 and TO-37 packages, the TEC can be used to tune the detector temperature to maintain maximum responsivity.

FTIR spectroscopy was developed to overcome the slow scanning limitations encountered with dispersive elements and therefore the interferogram needs to be processed quickly. The broad spectral response and short time constant of DLaTGS makes it suitable for this application.

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