Method for reducing birefringence in optical gratings
US5625723A · kind A · utility
15Cited by
7References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 28, 1995 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Feb 28, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/12023
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for reducing the inherent polarization shift caused by birefringence between the TE and TM modes of an optical signal propagating in an optical grating which has a plurality of waveguides includes the step of: irradiating the waveguides of the optical grating for different periods of time to induce a compensating polarization shift that substantially reduces the inherent polarization shift. If desired, a compensating polarization shift may be induced which not only reduces but also substantially eliminates the inherent polarization shift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.