发明授权
- 专利标题: Square optical pulse generator
- 专利标题(中): 方形光学脉冲发生器
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申请号: US842342申请日: 1992-03-25
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公开(公告)号: US5208455A公开(公告)日: 1993-05-04
- 发明人: Brian P. Nelson , Keith J. Blow , Nicholas J. Doran
- 申请人: Brian P. Nelson , Keith J. Blow , Nicholas J. Doran
- 申请人地址: GB2 London
- 专利权人: British Telecommunications plc
- 当前专利权人: British Telecommunications plc
- 当前专利权人地址: GB2 London
- 优先权: GBX8920913 19890915
- 主分类号: G02B6/28
- IPC分类号: G02B6/28 ; G02F1/35 ; H01S3/00 ; H01S3/10
摘要:
An all-optical fibre Sagnac antiresonant interferometer (2) is formed from an optical fibre having a non-linear refractive index. The coupler (8) is a dichroic coupler coupling equal portions of a cw optical signal at 1.53 .mu.m from laser (16) to ports (14 and 16) and all of a pulsed optical signal from laser (20 ) to port (14). The intensity of the pulsed optical signal is sufficient to provide a relative phase shift in the counter propagating 1.53 .mu.m signals. The loop (6) is longer than the inverse of the absolute difference in group delays of the cw and pulsed optical so causing a square optical pulse at 1.53 .mu.m to be switched to port (12) of the coupler.
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