Optical gate and optical phase modulator
US6728019B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2001 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Mar 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/509
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical gate according to the invention comprises a polarization divider to divide an optical signal into two orthogonal polarization components and to output them as a first polarization component which precedes in the time base and a second polarization component which follows the first one in the time base; a semiconductor optical amplifier to modulate the phase of the second polarization component output from the polarization divider according to a control light; an assist light supplier to supply to the semiconductor optical amplifier an assist light to help the recovery of the refractive index variation of the semiconductor optical amplifier caused by the control light; a polarization combiner to combine the first and second polarization components of the optical signal transmitting on the semiconductor optical amplifier so as to adjust them in the same time location; and a polarization extractor to extract a predetermined polarization direction component from the output from the polarization combiner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.