Method and apparatus providing reduced polarization-dependent loss
US6768589B2 · kind B2 · utility
3Cited by
12References
48Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 23, 2002 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Dec 23, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/1828
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A diffraction grating providing reduced polarization dependent loss. The elements of pixels of the diffraction grating are fixed or actuated such that some grating elements are actuated to correspond to a positive polarization dependent loss and others are actuated to correspond to a negative polarization dependent loss. The pixels may include multiples of three grating elements or multiples of four grating elements. An electrostatic beam structure providing increased actuation in a direction away from a substrate may be used in a diffraction grating providing reduced polarization dependent loss.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.