An integrated laser transmitter operating over a wide data- rate range in harsh environments.

A new, fully integrated long wavelength laser transmitter has been developed which operates over a wide bit rate (1 kb/s, 1010 pattern to 1 Gb/s, NRZ) and a wide temperature range (-65C to +85C), and requires only a single -5V power supply. The transmitter consists of a multi-frequency laser, thermoelectric heat pump, and the circuitry for modulation, automatic power control and heat/cool temperature control which are all enclosed in a compact multi-layer ceramic package.