The MPS-8033 Series of Fiber Optic Sources are microprocessor controlled laser diode sources capable of providing up to 20mW of optical power at user specified wavelengths with DFB laser diodes in the WDM C-Band and L-Band wavelengths. Other fiber optic source options include 850, 980 and 1480nm Fabry-Perot laser diodes up to 1mW. These include active and passive component testing for high-precision IL and ORL measurements, environmental testing, and power meter and detector calibration. The MPS-8033 conveniently displays output power in either mW or dBm. Decibel readings can also be displayed relative to an operator-selected reference level. Each MPS-8033 comes with a standard GPIB remote interface for easy incorporation into an automated test system or computer-controlled laboratory test.