FIBERPRO's Broadband ASE Source, the CLS-561, is a high power ASE source that offers stable output power up to 23dBm and provides a stable and broad spectrum over C band, L band or C+L band. It enables effective and efficient measurement required for passive optical devices for DWDM applications, such as Fiber Bragg Gratings, MUX/DEMUX, Isolator, Filters, Couplers, etc. It can also be used to improve component quality and performance. The CLS-561 also provides easy-to-use operation techniques for controlling and monitoring performance.