Electrooptically tuned external-cavity CW semiconductor laser and FM optical communications

We report the operation of an external-cavity CW double-heterojunction GaAs injection laser that can be electrooptically tuned rapidly over a large spectral range (∼ 50 Å) and experiments demonstrating the feasibility of FM optical communications using electronically tunable semiconductor lasers and CW and mode-locked dye lasers. An experiment on binary pulse-code FM optical communication is also reported and discussed.