FOM-1D Dual wavelength fiber optic laser source and detector module consists of two laser sources at 1310nm & 1550nm each with two PIN detectors. The Source has a provision for CW and External Modulation - both Analog and Digital. RS-232 interface is provided for Data Communication. Displays are provided to indicate forward voltage across and forward current, flowing through LED source. Built-in pulse generators are provided with pulse widths of 30ns and 100ns.