Title:
LASER FOR LASER MACHINING
Document Type and Number:
WIPO Patent Application WO/2001/007964
Kind Code:
A1
Abstract:
A laser device for laser machining, which limits the output power fluctuation to perform desired machining. A second harmonic (2$g(v)) enters a nonlinear optical crystal (2), which converts the harmonic (2$g(v)) to third harmonic (3$g(v)) or fourth harmonic (4$g(v)). The input and output ends of the nonlinear optical crystal (2) are provided with heaters (4a, 4b) controlled by temperature controllers (6a, 6b), respectively. One end of the nonlinear optical crystal (2) is maintained at a temperature which allows the maximum power immediately after laser irradiation, while the other end of the nonlinear optical crystal (2) is maintained at a temperature which allows the maximum output power after the temperature rise due to self- heating with laser irradiation.
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Inventors:
SAKUMA JUN (JP)
Application Number:
PCT/JP2000/003988
Publication Date:
February 01, 2001
Filing Date:
June 19, 2000
Export Citation:
Assignee:
USHIO RES INST OF TECHNOLOGY I (JP)
SAKUMA JUN (JP)
SAKUMA JUN (JP)
International Classes:
B23K26/382; G02F1/37; H01S3/00; H01S3/108; H05K3/00; G02F1/35; (IPC1-7): G02F1/37
Foreign References:
| US5047668A | 1991-09-10 | |||
| JPH06110098A | 1994-04-22 | |||
| JPH05142607A | 1993-06-11 | |||
| JPH04121718A | 1992-04-22 |
Other References:
MANN G. ET AL.: "Measurement of the absorption of nonlinear crystals used for high average power frequency doubling", PROCEEDINGS OF SPIE - THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING, vol. 3098, 1997, BERLIN, pages 582 - 590, XP002930127
Attorney, Agent or Firm:
Nagasawa, Shunichirou (Nishi-nippori 4-chome Arakawa-ku Tokyo, JP)
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