Optical amplifier
US9583911B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2016 |
| Grant date | Feb 28, 2017 |
| Priority date | — |
| Expiry date | Feb 26, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present embodiment relates to an optical amplifier which can perform an amplification operation equivalent to a normal operation even with an increase of dark current in a PD forming a part of a light detection circuit for monitoring signal light as an amplification object. In the optical amplifier, a detection controller performs an anomaly determination on a light detection circuit due to an increase of dark current in the PD based on a difference between temporal change amounts of a signal component of a voltage of output signal from a light receiving unit including the PD, and a voltage component in a high frequency region included in the signal component. An amplification controller can perform suitable switching of control on a drive current to a pumping light source, based on the result of the determination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.