The JDSU OA 400 Amplifier Series provides C-band optical amplification in an economical and compact package. It is designed for use in dense wavelength division multiplexing (DWDM) telecommunication systems, at points where the signal is not multiplexed. It can also be used in edge or access networks, where gain flattening is not required. Fully qualified JDSU grating-stabilized 980 nm pump lasers provide the stability of operation and reliability required by today's highest speed DWDM systems. The OA 400 can provide up to 24 dB small signal gain and up to 15 dB saturated output power, with a noise figure of less than 6 dB across the entire C band. The amplifier is delivered in a 70 x 90 x 12 mm platform, which supports a MultiSource Agreement. The OA 400 performs as a preamplifier, a line amplifier, and a booster amplifier.