OSI Optoelectronics offers three types of dual sandwich detectors. The silicon-silicon sandwich is when one silicon photodiode is placed on top of the other, with the photons of shorter wavelengths absorbed in the top silicon and the photons of longer wavelengths penetrating deeper, absorbed by the bottom photodiode.
For applications requiring a wider range of wavelength beyond 1.1 µm, an InGaAs photodiode replaces the bottom photodiode. The silicon-InGaAs version is also available with a two stage thermo-electric cooler for more accurate measurements by stabilizing the temperature of the InGaAs detector. All devices are designed for photovoltaic operation (no bias), however, they may be biased if needed, to the maximum reverse voltage specified. They are ideal for coupling to an operational amplifier in the current mode.
Additional Product Features Include:
- Hermetically Sealed
- Low Noise
- Wide Wavelength Range
- Remote Measurements
- w/ TEC
Download the available datasheet to learn more.