发明授权
- 专利标题: Reduction of B-integral accumulation in lasers
- 专利标题(中): 激光器中B积分的减少
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申请号: US92053申请日: 1998-06-05
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公开(公告)号: US6141362A公开(公告)日: 2000-10-31
- 发明人: David D. Meyerhofer , Oleg A. Konoplev
- 申请人: David D. Meyerhofer , Oleg A. Konoplev
- 申请人地址: DC Washington
- 专利权人: The United States of America as represented by the United States Department of Energy
- 当前专利权人: The United States of America as represented by the United States Department of Energy
- 当前专利权人地址: DC Washington
- 主分类号: G02F1/35
- IPC分类号: G02F1/35 ; H01S3/23 ; H01S3/13
摘要:
A pulsed laser is provided wherein the B-integral accumulated in the laser pulse is reduced using a semiconductor wafer. A laser pulse is generated by a laser pulse source. The laser pulse passes through a semiconductor wafer that has a negative nonlinear index of refraction. Thus, the laser pulse accumulates a negative B-integral. The laser pulse is then fed into a laser amplification medium, which has a positive nonlinear index of refraction. The laser pulse may make a plurality of passes through the laser amplification medium and accumulate a positive B-integral during a positive non-linear phase change. The semiconductor and laser pulse wavelength are chosen such that the negative B-integral accumulated in the semiconductor wafer substantially cancels the positive B-integral accumulated in the laser amplification medium. There may be additional accumulation of positive B-integral if the laser pulse passes through additional optical mediums such as a lens or glass plates. Thus, the effects of self-phase modulation in the laser pulse are substantially reduced.
公开/授权文献
- USD409513S Emergency alarm 公开/授权日:1999-05-11