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Title:
MULTI-PASS WAVELENGTH CONVERSION METHOD OF LASER BEAM AND DEVICE
Document Type and Number:
Japanese Patent JP3634164
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a wavelength conversion device and method for making a high-efficiency wavelength conversion in comparison with a conventional wavelength conversion method, by the constitution of a simple device constituted using an optical system, which is generally available commercially.
SOLUTION: A wavelength of a fundamental wave laser beam is converted into the wavelength of second harmonics in a nonlinear crystal 14. At that time, the fundamental wave laser beam not converted its wavelength is separated by a separator 16 to return to a polarizer 12 via a mirror 18 and the like, is made incident again on the crystal 14 and the wavelength of the laser beam is again converted into the wavelength of the second harmonics. That is, the laser beam converting its wavelength and the laser beam not converting its wavelength in the crystal 14 are separated from each other, the laser beam not converting its wavelength is combined with an incident laser beam to make incident again on the same crystal 14 and the laser beam reconverts its wavelength. Accordingly, it becomes possible to increase the wavelength conversion efficiency of the fundamental wave laser beam.


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Inventors:
Oba Regular
Maruyama Yoichiro
Masaaki Kato
Application Number:
JP29680398A
Publication Date:
March 30, 2005
Filing Date:
October 19, 1998
Export Citation:
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Assignee:
Japan Atomic Energy Research Institute
International Classes:
H01S3/108; G02F1/37; (IPC1-7): H01S3/108; G02F1/37
Domestic Patent References:
JP5297431A
JP5088228A
JP4195027A
JP6097560A
JP6112574A
JP4128825A
JP57115891A
JP10153805A
JP5040286A
JP59128525A
JP62104092A
JP4031125U
Attorney, Agent or Firm:
Kazuo Shamoto
Shosuke Imai
Tadashi Masui
Tadahiko Kurita
Yasushi Kobayashi
Hideo Tanaka



 
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