Multichannel polarization stabilization employing synchronous phase-locking methods
US8922772B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2012 |
| Grant date | Dec 30, 2014 |
| Priority date | — |
| Expiry date | Jun 5, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/06754
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multichannel optical system including a mixing device responsive to a sample beam and a reference beam that provides an in-phase signal including the mixed sample beam and reference beam having a relative phase of 0° and a quadrature phase signal including the mixed sample beam and reference beam having a relative phase of 90°. The system also includes a photodetector responsive to the quadrature phase signal that converts the quadrature phase signal to a quadrature phase electrical signal. A polarization demultiplexer circuit receives the quadrature phase electrical signal and measures the amplitude of a unique time-dependent phase dither profile having a zero time-averaged mean and a zero time-averaged correlation to the other phase dither profiles and provides a polarization amplitude signal. A polarization controller receives the polarization amplitude signal and controls the reference beam to maximize the polarization amplitude signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.