The compact TO-packaged units offer the user the convenience and performance advantages of having the photodetector and amplifier in as close proximity as possible, minimizing EMI and microphonics. Hybrid photodiode/ amplifier modules are available using any of our room temperature or TE-cooled photodiodes.
A 4-pin TO-5 is used for fixed-gain, un-cooled units with active areas up to 3mm diameter. TO-8 packages are used for larger area devices and for applications where user selectability in terms of gain, bandwidth, and offset is desirable. TE-coolers for temperature stabilization and/or performance enhancement can also be added in the TO-8 packages and in the larger T-5 OFHC copper housings. Photoconductor/amplifier modules are available containing PbS, PbSe and HgCdTe devices. These use TO-8 or T-5 packages for either room temperature or TE-cooled operation. The units are AC-coupled and can be provided with user selectable bias, gain, and bandwidth.