This paper reports the performance and test results of a highpower
laser diode transmitter (HPLDT). The HPLDT provides a controlled
environment to operate semiconductor lasers with power levels
exceeding 0.5 W and is scalable to multi-watt output powers. It provides
thermal and optical power control and overdrive protection, and is capable
of modulating the laser at high data rates (up to i0 pulses/s). In
addition, the HPLDT can accommodate a variety of semiconductor lasers
and input modulating signal types over a wide bandwidth.