Launch optics with optical path compensation for a wavelength selective switch
US9341870B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2014 |
| Grant date | May 17, 2016 |
| Priority date | — |
| Expiry date | Nov 26, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0035
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical device includes an optical port array, a first walk-off crystal, a first half-wave plate, a second walk-off crystal and a segmented half-wave plate. The optical port array has a first and second plurality of ports for receiving optical beams. The first walk-off crystal spatially separates the beams into first and second portions that are in first and second orthogonal polarization states, respectively. The first portions are walked-off by the first walk-off crystal and the second portions pass therethrough without being walked-off. The first half-wave plate rotates the polarization state of the first and second portions of the optical beams. The second walk-off crystal is oriented in an opposite direction from the first walk-off crystal such that the second portions are walked-off by the second walk-off crystal and the first portions pass therethrough without being walked-off. The segmented half-wave plate receives the first or second portions of the beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.