Avalanche Photodiode (APD) LLAM Series Datasheet

Excelitas Technologies’ LLAM series of Silicon and InGaAs avalanche photodiodes (APD) receiver modules feature an APD, thermoelectric cooler (TEC) and a hybrid, all in the same hermetically-sealed modified 12-lead TO-66 flange package for increased heat sinking. The use of a TEC ensures lower noise and constant responsivity over a 5⁰C to 40⁰C ambient temperature range.

The LLAM series modules are specifically designed for the detection of high-speed, low-light analog signals. The Si APDs used in these devices are the same as used in Excelitas’ C30902EH and C30954EH products, while the InGaAs APDs are used in the C30645EH and C30662EH products. These detectors provide very good response between 830 and 1550 nm and very fast rise- and fall-times at all wavelengths. The preamplifier section of the module uses a very low noise GaAs FET front end designed to operate at higher transimpedance than Excelitas’ regular C30950 Series.