Abstract

We have proposed and demonstrated that optical coherence function can be synthesized by direct frequency modulation of a laser diode LD. By using this technique, the studies of photonic sensing systems^1,2,4,5 and photonic information processing systems³ have been carried out both theoretically and experimentally. These systems have simple construction, variable resolution and wide dynamic range, and need no mechanical-moving-parts nor calculation. Recently we have also shown a phase modulation of the reference lightwave can make it possible to scan the coherence function without changing its shape.^4,5 This technique improves the performance of their photonic systems.

© 1995 IEEE