Abstract

We have recently suggested a double-beam modulation (DBM) method for broadband optical communications. A new DBM using frequency locked lasers (FLL) has been recently demonstrated. The DBM automatically creates a subcarrier upon detection by a photo detector. The new DBM-FLL can generate very high subcarrier frequencies that can also be easily tuned. So far we have been able to tune the frequency from several gigahertz to 15 GHz; the frequency range is currently limited by the detector and electronics.

© 1990 Optical Society of America