Title:
LASER
Document Type and Number:
Japanese Patent JPH04250678
Kind Code:
A
Abstract:
PURPOSE: To suppress deterioration of performance associated with variation in the length of a resonator by varying the temperature of an etalon based on output parameters supervised such that the peak in the discharge frequency curve of the etalon tracks frequency drift of a laser in a selected vertical mode. CONSTITUTION: Output from a photodetector 52 is amplified through an amplifier 54 and converted through an A/D converter 56 into a digital signal. The digital value is delivered to a main processor 58 processing all operational parameters of a laser. A measured value of power is delivered to an internal etalon tracking program 60 stored in an EPROM connected with the main processor 58. Output from the tracking program instructs a temperature to be set for the etalon in order to maximize the performance.
Inventors:
TOREISHII FURANSHISU TOON
Application Number:
JP11090291A
Publication Date:
September 07, 1992
Filing Date:
April 16, 1991
Export Citation:
Assignee:
COHERENT INC
International Classes:
H01S3/137; H01S3/08; (IPC1-7): H01S3/137
Domestic Patent References:
| JPH01181485A | 1989-07-19 | |||
| JPS6484681A | 1989-03-29 |
Foreign References:
| US4914662A | 1990-04-03 | |||
| US3987373A | 1976-10-19 |
Attorney, Agent or Firm:
Yuzo Yamazaki (2 outside)