Phase-continuous and frequency-variable light source

Details Phase-continuous and frequency-variable light source Phase-continuous and frequency-variable light source

1994-09-09

1995-09-12

Bovernick, Rodney B.

Coherent light generators

Particular beam control device

Tuning

372 38, H01S 310

Patent

active

054504287

ABSTRACT:
The purpose of the present invention is to provide a phase-continuous and frequency-variable light source without a decrease of phase-continuous width while scanning the optical frequency under different operating conditions and having the capability of varying the optical frequency with phase-continuity under the best conditions. In accordance with the phase-continuous and frequency-variable light source of the present invention, a beam splitter for splitting a forward-directed beam from an active region of the light source, a first beam detector for detecting a reflected beam from the beam splitter, and a second beam detector for detecting a backward-directed beam from a DBR region of the light source are provided and feedback control is conducted in a manner such that a ratio of a forward-directed optical output and a backward-directed optical output from the detectors is fixed to a predetermined value.

REFERENCES:
patent: 4971415 (1990-11-01), Hara et al.
patent: 5325382 (1994-06-01), Emura et al.

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