Optical reception device, optical receiving method, and optical transmission apparatus
AssigneeFujitsu Limited
InventorTsukasa Takahashi
Life of this patent
Estimating the term…
Abstract
An optical reception device is provided. The optical reception device includes a filtering unit that receives input light of predetermined power, filters the input light by use of filter characteristics where the degree of attenuation of the power of an optical signal of predetermined frequency is lower than the degree of attenuation of the power of an optical signal of another frequency, and supplies an output light; and a determining unit that compares a value relevant to the power of the output light supplied by the filtering unit, with a threshold, and determines whether the input light contains signal light.
Claims13
An optical reception device comprising:
- a filtering unit that receives input light of predetermined power, filters the input light by use of filter characteristics where the degree of attenuation of the power of an optical signal of predetermined frequency is lower than the degree of attenuation of the power of an optical signal of another frequency, and supplies an output light;
- and
- a determining unit that compares a value relevant to the power of the output light supplied by the filtering unit, with a threshold, and determines whether the input light contains signal light.
An optical receiving method comprising:
- a filtering operation in which an input light of predetermined power is received, the input light is filtered using filter characteristics where the degree of attenuation of the power of an optical signal of predetermined frequency is lower than the degree of attenuation of the power of an optical signal of another frequency, and an output light is supplied;
- and
- a determining operation in which a value relevant to the power of the output light supplied in the filtering operation is compared with a threshold, and a determination is made whether the input light contains signal light.
An optical transmission apparatus comprising:
- an optical reception device that includes:
- a filtering unit that receives an input light of predetermined power, filters the input light by use of filter characteristics where the degree of attenuation of the power of an optical signal of predetermined frequency is lower than the degree of attenuation of the power of an optical signal of another frequency, and supplies an output light;
- and a determining unit that compares a value relevant to the power of the output light supplied by the filtering unit, with a threshold, and determines whether the input light contains signal light.
An optical transmission apparatus comprising:
- a filtering unit that filters an input where a degree of attenuation of power of an optical signal of a first frequency is lower than the a degree of attenuation of the power of an optical signal of second frequency;
- and
- a determining unit that compares a value relevant to the power of the filtered light with a threshold, and outputs a result.
Dependencies are inferred from the claim text.