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| MID-IR |
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Photodiodes
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Photodiodes are based on heterostructures with wide band-gap material. PD24 and PD25 models are based on GaInAsSb/GaAlAsSb structure and PD36 is based on InAs/InAsSbP structure. Fast response time makes them suitable for detection of high-frequency modulated IR radiations. The device is mounted on the TO-18 package or TO-5 package with TE-cooler inside and can be equipped with the parabolic reflector.
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Three types of photodiodes - PD24, PD25 and PD36 can operate in photovoltaic regime or at reverse bias mode. Curves presented here are characteristics of the detectivity vs wavelength at room temperature. With increasing temperature (using thermo-electric cooler) detectivity increases and cut-off wavelength shifts to shorter wavelengths.
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