Optical amplifier
US6442309B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1999 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Nov 9, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/1312
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light amplifier is provided which is capable of maintaining the output light of excitation light sources at a constant level even when the light power input into the rare earth containing optical fiber fluctuates due to the tracking error of the excitation light source or due to the temperature characteristic or the polarization dependence of the excitation light multiplexer. The light passed through the rare earth containing optical fiber is extracted after being split by the splitting device 3, and output levels of the excitation light sources and are controlled by a control circuit in response to the levels of the extracted light. Consequently, the light output can be maintained at a constant level even when the excitation light power input into the optical fiber fluctuates due to the polarization dependence or the temperature characteristic of the light multiplexer for supplying the excitation light into the optical fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.