发明名称 |
Writing diffraction gratings with interference fringe patterns |
摘要 |
A progressive method of writing a long grating in a substrate using a pulsed interference fringe pattern. The substrate is moved through the fringe pattern while being continuously illuminated with light of a different wavelength to produce a diffracted beam whose phase is monitored to produce a control signal that regulates the pulsing of the writing beam to ensure that the fringe pattern is present only when it is in correct registry with the grating being written.
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申请公布号 |
US5822479(A) |
申请公布日期 |
1998.10.13 |
申请号 |
US19970788615 |
申请日期 |
1997.01.24 |
申请人 |
NORTHERN TELECOM LIMITED |
发明人 |
NAPIER, BRUCE;PHILLIPS, NICHOLAS JOHN |
分类号 |
G02B6/13;G02B5/18;G02B6/02;G03F7/20;(IPC1-7):G02B6/34 |
主分类号 |
G02B6/13 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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