S-band single channel EDFA provides amplification in the wavelength range 1510 – 1520 nm. This EDFA can be used to add monitoring, controlling and communication channels to the existing telecom networks. The unit comes with control software and RS232 interface. Also available in rack mount and table top top chassis. The S-band EDFA is a stand-alone gain block module that requires +5VDC bias (package D) and can be ordered with or without an integral heat sink. The dedicated digital and analog circuitry precisely controls the pump temperature and pump current using its monitoring and alarm functions.