Optical frequency sweep signal generator

Details Optical frequency sweep signal generator Optical frequency sweep signal generator

1997-01-24

1998-07-28

Lee, John D.

Optical: systems and elements

Optical frequency converter

Optical laser acoustic delay line type

25022727, 372 32, 372 38, H01S 313

Patent

active

057869308

ABSTRACT:
An optical frequency sweep signal generator using an optical frequency variable bandpass filter which can be practically used is provided. The optical frequency sweep signal generator comprises: a circulation control circuit for generating a first electric signal which indicates the start and the end of a sweep; an optical loop circuit; an optical frequency variable bandpass filter, provided in the loop circuit, for suppressing circulation of natural emission light output from an optical amplifier; a light receiving element for converting a part of light output from the optical loop circuit into a second electric signal; a sweep signal analyzing circuit for outputting a set value for compensating for a difference between the center frequency of the optical frequency variable bandpass filter and the optical frequency of the pulsed light based on the first and second electric signals; and a driving circuit for supplying a driving signal for determining the center frequency of the optical frequency variable bandpass filter to the optical frequency variable bandpass filter, based on the first electric signal and the set value.

REFERENCES:
patent: 4883963 (1989-11-01), Kemeny et al.
patent: 5548402 (1996-08-01), Nogiwa

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