The APD-500M-A from LD-PD Inc is an InGaAs Avalanche Photodetector that has a spectral range of 800 nm - 1700 nm. It has a bandwidth of 500 MHz and detector responsivity of 9 V/W. This photodetector has a transimpedance gain of 50K V/W and noise equivalent power (NEP) of 0.46 pW/sqrt(Hz). It has an output impedance of 50 Ohms and a saturated input optical power of 78 µW. This photodetector supports FC/APC (or Free Space) and SMA connectors. It requires a DC supply voltage of 5 V and consumes 0.5 A of current. This photodetector is available in a compact design that measures 65 mm x 50 mm x 20 mm and is ideal for optical fiber sensing, optical fiber communication, laser ranging, and spectrometry applications.