Optical depolarizers and DGD generators based on optical delay
US7154659B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2003 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Oct 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Techniques and devices for depolarizing light and producing a variable differential group delays in optical signals. In one implementation, an input optical beam is split into first and second beams with orthogonal polarizations. One or two optical reflectors are then used to cause the first and second optical beams to undergo different optical path lengths before they are recombined into a single output beam. An adjustment mechanism may used implemented to adjust the difference in the optical path lengths of the first and second beams to produce a variable DGD. When the depolarization of light is desired, the difference in the optical path lengths of the first and second beams is set to be greater than the coherence length of the input optical beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.