Optical amplifier module and dispersion compensation fiber loss detection method
AssigneeFujitsu Limited
InventorsTomotaka Otani, Toshihiro Ohtani
Life of this patent
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Abstract
An optical amplifier module includes a first optical amplifier to amplify main signal light to be supplied to a dispersion compensation fiber (DCF), a second optical amplifier to amplify the main signal light supplied from the DCF, a generating part to generate monitoring light having a wavelength longer than a wavelength of the main signal light, a multiplexing part to multiplex the monitoring light generated by the generating part and the main signal light to be supplied to the DCF, a demultiplexing part to demultiplex the monitoring light from the main signal light supplied from the DCF, and a detection part to detect a light intensity of the monitoring light demultiplexed by the demultiplexing part.
Claims20
An optical amplifier module comprising:
- a first optical amplifier configured to amplify main signal light that is to be supplied to a dispersion compensation fiber;
- a monitoring light generating part configured to generate monitoring light having a wavelength longer than a wavelength of the main signal light;
- a multiplexing part configured to multiplex the monitoring light generated by the monitoring light generating part and the main signal light that is amplified by the first optical amplifier;
- a demultiplexing part configured to demultiplex the monitoring light from the main signal light supplied from the dispersion compensation fiber;
- a light intensity detecting part configured to detect a light intensity of the monitoring light demultiplexed by the demultiplexing part;
- and
- a second optical amplifier configured to amplify the main signal light output from the demultiplexing part in order to provide amplified main signal light.
A dispersion compensation fiber loss detection method for detecting an optical loss in a dispersion compensation fiber coupled to an optical amplifier module, comprising:
- amplifying main signal light that is to be supplied to the dispersion compensation fiber by a first optical amplifier of the optical amplifier module;
- generating monitoring light having a wavelength longer than a wavelength of the main signal light;
- multiplexing the monitoring light and the main signal light that is amplified by the amplifying;
- demultiplexing the monitoring light from the main signal light supplied from the dispersion compensation fiber;
- first detecting a light intensity of the monitoring light that is demultiplexed by the demultiplexing;
- and
- second detecting the optical loss in the dispersion compensation fiber from the light intensity of the monitoring light that is detected by the first detecting.
Dependencies are inferred from the claim text.