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Title:
OPTICAL PULSE SOURCE OF STABILIZED REPETITIVE FREQUENCY
Document Type and Number:
Japanese Patent JPH1187828
Kind Code:
A
Abstract:

To provide an optical pulse source of a stabilized repetitive frequency for being effective to the optical pulse source provided with any high repetitive frequency, and minimizing the increase of noise by an electronic circuit.

A part of an optical pulse string from a laser resonator 100 is branched by a branching mirror 102 and bisected further by the branching mirror 103, and one of pulse strings is passed through a waveform shaping device 105, propagated through an optical delay line 1.06 for supplying delay equal to the integral multiple of a pulse repetition cycle, and then, made incident to a cross-correlation device 107 along with the other pulse string bisected by the branching mirror 103. The cross-correlation device converts nonlinear signals generated by making the two pulse strings be incident on a nonlinear crystal 118 to electric signals and outputs them as cross-correlation signals Gc. The difference of a cross-correlation signal voltage and a reference voltage 108 is inputted to an integration circuit 109, a resonator length adjustment mechanism 101 is driven by a driving circuit 110 based on the output of the integration circuit 109, and the resonator length of the laser resonator is adjusted.


Inventors:
NAGANUMA KAZUNORI
ISHIBASHI SHIGEO
ISHIDA YUZO
Application Number:
JP24561297A
Publication Date:
March 30, 1999
Filing Date:
September 10, 1997
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
G02B26/06; G02F1/35; H01S3/137; (IPC1-7): H01S3/137; G02B26/06; G02F1/35
Attorney, Agent or Firm:
谷 義一 (外1名)