Optical receiving apparatus and method
AssigneeKDD Submarine Cable Systems Inc.
InventorsHidenori Taga, Koji Goto
Life of this patent
Estimating the term…
Abstract
An optical receiving apparatus according to the present invention comprises an optical receiver for receiving a signal light input from an optical transmission line, a discriminator for discriminating an output signal of the optical receiver, an evaluator for evaluating transmission characteristics of the optical transmission line according to the received signal of the optical receiver, and a threshold controller for controlling the discrimination threshold of the discriminator according to the evaluated result of the evaluator.
Claims11
An optical receiving apparatus, comprising:
- an optical signal brancher to branch an optical input signal from an optical transmission line to a first optical signal component and a second optical signal component;
- a photodetecting element to convert the first optical signal component into an electrical signal;
- a characteristic-evaluator to evaluate transmission characteristics of the optical transmission line according to an amplitude of the second optical signal component, the means for evaluating having a saturable absorber to which the second optical signal component enters to determine a discrimination threshold signal according to an amplitude of a signal light output from the saturable absorber;
- and
- a discriminator to discriminate the electrical signal output, according to the discrimination threshold signal determined by the means for evaluating.
A method for optical reception, comprising:
- branching an optical input signal from an optical transmission line into a first optical component and a second optical component;
- converting the first optical component into an electrical signal;
- applying the second optical component to a saturable absorber;
- determining a receiving discrimination threshold according to an amplitude of an output light from the saturable absorber;
- and
- discriminating the electrical signal according to the determined receiving discrimination threshold.
An optical receiving apparatus, comprising:
- means for branching an optical input signal from an optical transmission line to a first optical signal component and a second optical signal component;
- means for converting the first optical signal component to an electrical signal;
- means for discriminating the first electric signal;
- and
- means for evaluating transmission characteristics of the optical transmission line according to an amplitude of the second optical signal component from the brancher means, the means for evaluating having a saturable absorber to which the second optical signal component enters to generate a discrimination threshold signal according to an amplitude of a signal light output from the saturable absorber, wherein the discriminating means discriminates the electrical signal, according to the discrimination threshold signal determined by the evaluating means.
Dependencies are inferred from the claim text.