Optical transmission apparatus, method for setting wavelength, and optical transceiver
AssigneeFujitsu Limited
InventorsMasatake Miyabe, Shoichiro Oda
Life of this patent
Estimating the term…
Abstract
An optical transmission apparatus includes the optical transceiver configured to generate a test light for each wavelength assignable to the wavelength multiplex light to transmit the test light to the optical transmission line via the wavelength multiplexer and demultiplexer, detect a reflected light for the test light from the optical transmission line, calculate an arrival distance of the test light for the each wavelength from the reflected light for the each wavelength, and set a wavelength having a longest arrival distance among the arrival distances for the respective wavelengths, as a wavelength to be assigned to the signal light in the optical transceiver.
Claims9
An optical transmission apparatus comprising:
- a plurality of optical transceivers including an optical transceiver;
- and
- a wavelength multiplexer and demultiplexer configured to multiplex lights output from the respective plurality of optical transceivers, output a multiplexed light to an optical transmission line, receive a wavelength multiplex light from the optical transmission line, demultiplex the received wavelength multiplex light, and output the demultiplexed lights to the respective plurality of optical transceivers, wherein
- the optical transceiver is configured to
- generate a test light for each wavelength assignable to the wavelength multiplex light to transmit the test light to the optical transmission line via the wavelength multiplexer and demultiplexer,
- detect a reflected light for the test light from the optical transmission line,
- calculate a distance from the reflected light that is associated with each of the test light for the each wavelength that has transmitted,
- select a wavelength having a longest distance among the distances for the respective wavelengths according to the calculated distances, and
- set the wavelength having the longest distance, as a wavelength to be assigned to the signal light in the optical transceiver.
A method for setting a wavelength to be executed by an optical transmission apparatus, the method comprising:
- generating a test light for each wavelength;
- transmitting the generated test light to an optical transmission line;
- detecting a reflected light for the test light from the optical transmission line;
- calculating a distance from the detected reflected light that is associated with each of the test light for each of the wavelength that has transmitted;
- selecting a wavelength having a longest distance among distances, each of the distances correspond to the each wavelength according to the calculated distances, and
- setting the wavelength having the longest distance, as a wavelength to be assigned to a signal light to be generated by an optical transceiver included in the optical transmission apparatus.
An optical transceiver comprising:
- an optical modulator configured to generate a test light for each wavelength assignable to a wavelength multiplex light obtained by multiplexing signal lights having different wavelengths from respective optical transceivers by a wavelength multiplexer and demultiplexer and output the wavelength multiplex light to an optical fiber;
- a detector configured to detect a reflected light for the test light from the optical fiber;
- and
- a processor configured to:
- calculate a distance based on the reflected light that is associated with the test light for each of the respective wavelengths, and
- a wavelength having a longest distance among the distances for the respective wavelengths according to the calculated distances, and set the wavelength having the longest distance, as a wavelength to be assigned to the signal light in the optical transceiver.
Dependencies are inferred from the claim text.