US 8,554,071 B2Granted

Optical transmission apparatus and continuity testing method

AssigneeFujitsu Limited

InventorsTakuma Shoji, Ichiro Nakajima

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Abstract

An optical transmission apparatus includes an amplifier, a first output port to select a wavelength from the wavelength-division-multiplexed signal light amplified and output signal light with the selected wavelength to an operation line, a second output port to output multiplexed light obtained by multiplexing any one of first spontaneous emission light and second spontaneous emission light to a preliminary line, the first and the second spontaneous emission light being parts of spontaneous emission light generated by the amplifier, the first spontaneous emission light being in a wavelength range that is not selected, and the second spontaneous emission light being in a wavelength range other than a range of the wavelength-division-multiplexed signal light, and a judger to judge a continuity state of the operation line by using the signal light output to the operation line and a continuity state of the preliminary line.

Claims8

Dependent claims

An optical transmission apparatus comprising:

an amplifier to receive and amplify wavelength-division-multiplexed signal light;
a first output port to select a wavelength from the wavelength-division-multiplexed signal light amplified by the amplifier and output signal light with the selected wavelength to an operation line, which is one of a plurality of optical transmission lines;
a second output port to output multiplexed light obtained by multiplexing any one of first spontaneous emission light and second spontaneous emission light to a preliminary line, which is another one of the plurality of optical transmission lines, the first spontaneous emission light and the second spontaneous emission light being parts of spontaneous emission light generated by the amplifier, the first spontaneous emission light being in a wavelength range that is not selected by the first output port, and the second spontaneous emission light being in a wavelength range other than a wavelength range of the wavelength-division-multiplexed signal light;
and
a judger to judge a continuity state of the operation line by using the signal light output to the operation line by the first output port and judge a continuity state of the preliminary line by using the multiplexed light output to the preliminary line by the second output port.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/011,385Filed 21 Jan 2011
Priority: JP 2010-1728628 Jan 2010
Published: US 2011/0182585 A128 Jul 2011
Granted: 8 Oct 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04J 14/0212
Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]: using…
H04B 10/0797
Using measurements of the data signal: monitoring line amplifier or line repeater equipment
H04J 14/02214
Power control, e.g. to keep the total optical power constant: by re-allocation of data channels
H04J 14/0227
Wavelength-division multiplex systems: operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing…