Title:
ラマン増幅器
Document Type and Number:
Japanese Patent JP6075035
Kind Code:
B2
Abstract:
Raman amplifier includes: a pump-light generator configured to supply pump light to a transmission fiber; a measurement circuit configured to measure a relationship between power of the pump light and power of noise output from the transmission fiber with respect to a range from first pump-light power to second pump-light power; a signal detector configured to monitor a supervisory signal in output light of the transmission optical; and a decision unit configured to decide a state of the transmission fiber according to the monitoring result. When the supervisory signal is detected without the pump light, the measurement circuit measures the relationship while increasing the power of the pump light from the first pump-light power. When the supervisory signal is not detected without the pump light, the measurement circuit measures the relationship while decreasing the power of the pump light from the second pump-light power.
Inventors:
Tomoaki Takeyama
Nobuyuki Hara
Komaki Kosuke
Shota Mori
Nobuyuki Hara
Komaki Kosuke
Shota Mori
Application Number:
JP2012261722A
Publication Date:
February 08, 2017
Filing Date:
November 29, 2012
Export Citation:
Assignee:
富士通株式会社
International Classes:
G02F1/35; H04B10/07; H04B10/293
Domestic Patent References:
| JP2009186615A | ||||
| JP2010004410A | ||||
| JP2006066610A | ||||
| JP2009188541A | ||||
| JP2004294587A |
Foreign References:
| WO2004105275A1 | ||||
| WO2012111403A1 |
Attorney, Agent or Firm:
Yoshiyuki Osuga
virtue Tamio Ei
virtue Tamio Ei