Optical receiver and communication system
AssigneeFujitsu Optical Components Limited
InventorHiromasa Tanaka
Life of this patent
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Abstract
There is provided an optical receiver including a variable-ratio splitter to split an input signal light into a plurality of signal lights, based on a variable ratio, a plurality of photo detectors to receive the plurality of signal lights respectively, an operation circuit to output a reception electrical signal, based on a reception processing on one of the plurality of signal lights, a calculation circuit to calculate a total power of the plurality of signal lights received by the plurality of photo detectors, and an output unit to output a signal regarding the total power.
Claims17
An optical receiver comprising:
- a variable-ratio splitter to split an input signal light into a plurality of signal lights, based on a variable ratio;
- a plurality of photo detectors to receive the plurality of signal lights respectively;
- an operation circuit to output a reception electrical signal, based on a reception processing on one of the plurality of signal lights;
- a calculation circuit to calculate a total power based on the plurality of signal lights received by each of the plurality of photo detectors;
- and
- an output unit to output a signal regarding the total power.
A communication system comprising:
- an optical receiver including:
- a variable-ratio splitter to split an input signal light into a plurality of signal lights, based on a variable ratio;
- a plurality of photo detectors to receive the plurality of signal lights respectively;
- an operation circuit to output a reception electrical signal, base on a reception processing on one of the plurality of signal lights;
- a calculation circuit to calculate a total power based on the plurality of signal lights received by each of the plurality of photo detectors;
- and
- an output unit to output a signal regarding the total power;
- an optical transmitter to transmit a plurality of signal lights;
- and
- an optical fiber through which the optical transmitter transmits the plurality of optical lights to the optical receiver.
An optical receiver comprising:
- a variable-ratio splitter to split an input signal light into a plurality of signal lights, based on a variable ratio;
- a plurality of photo detectors to receive the plurality of signal lights respectively;
- an operation circuit to output a reception electrical signal, based on a reception processing on one of the plurality of signal lights;
- a calculation circuit to calculate a total power of the plurality of signal lights received by the plurality of photo detectors;
- and
- an output unit to output a signal regarding the total power,
- wherein the variable-ratio splitter includes:
- a polarization adjusting plate to adjust the ratio of polarized components included in the input signal light;
- and
- a first polarizer to split the input signal light processed by the polarization adjusting plate into a first plurality of signal lights including each polarized component.
An optical receiver comprising:
- a variable-ratio splitter to split an input signal light into a plurality of signal lights, based on a variable ratio;
- a plurality of photo detectors to receive the plurality of signal lights respectively;
- an operation circuit to output a reception electrical signal, based on a reception processing on one of the plurality of signal lights;
- a calculation circuit to calculate a total power of the plurality of signal lights received by the plurality of photo detectors;
- and
- an output unit to output a signal regarding the total power,
- wherein a predetermined photo detector of the plurality of photo detectors receives all of the plurality of signal lights from the variable-ratio splitter;
- and
- wherein the operation circuit performs the reception processing on the signal light from the predetermined photo detector.
Dependencies are inferred from the claim text.