Title:
OPTICAL THIN FILM AND LASER DEVICE
Document Type and Number:
Japanese Patent JP3174794
Kind Code:
B2
Abstract:
PURPOSE: To provide the optical thin film which is usable as the output mirror of a laser device capable of efficiently and highly repetitively oscillating laser beams of good mode patterns, an optical fiber for shaping the intensity distribution of laser beams, etc., and the laser device for which the optical thin film is used.
CONSTITUTION: The min. reflectivity (28% in an example in the Fig.) of the part corresponding to the skirt of the Gaussian function or super-Gaussian function of the optical thin film which is constituted by laminating plural thin films consisting of materials varying in refractive index on a substrate and have the distribution expressed by the Gaussian function or super-Gaussian function in the reflectivity distribution from the central part to the peripheral edge thereof is set higher than the surface reflectivity of the substrate. As a result, the optical thin film which is usable as the output mirror of the laser device capable of efficiently and highly repetitively oscillating the laser beams of the good mode patterns, the optical fiber for shaping the intensity distribution of the laser beams, etc., and the laser device for which the optical thin film is used are obtd.
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Inventors:
Teruo Yamashita
Application Number:
JP11144292A
Publication Date:
June 11, 2001
Filing Date:
April 30, 1992
Export Citation:
Assignee:
Hoya Co., Ltd.
International Classes:
G02B5/08; H01S3/08; H01S5/10; (IPC1-7): G02B5/08
Domestic Patent References:
| JP240980A | ||||
| JP4941094A |
Attorney, Agent or Firm:
Setsuo Aniya (1 person outside)