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US 2007/0166033 A1Published application
Analyzing the quality of an optical waveform
AssigneeFujitsu Limited
InventorCechan Tian
Life of this patent
Estimating the term…
Abstract
Monitoring an optical signal includes receiving the optical signal. The optical signal is filtered to pass through a selected wavelength of the optical signal. The following is performed for each selected wavelength: receiving photons of the optical signal at a photo-reactive material operable to produce a reaction in response to the arrival of a predetermined number of photons; producing reactions in response to the arrival of the photons; and generating waveform monitor output in response to the reactions, where the waveform monitor output indicates a waveform quality of the optical signal at each wavelength.
Claims20
A signal quality analyzer operable to monitor an optical signal, comprising:
- a tunable filter operable to:
- receive an optical signal;
- and
- filter the optical signal to pass through a selected wavelength of a plurality of selected wavelengths of the optical signal;
- and
- a waveform monitor comprising a photo-reactive material operable to produce a reaction in response to the arrival of a predetermined number of photons, the waveform monitor operable to perform the following for each selected wavelength of the plurality of selected wavelengths:
- receive a plurality of photons of the optical signal;
- produce a plurality of reactions in response to the arrival of the plurality of photons;
- and
- generate waveform monitor output in response to the plurality of reactions, the waveform monitor output indicating a waveform quality of the optical signal at the each wavelength.
7 more elements
A method for monitoring an optical signal, comprising:
- receiving an optical signal;
- filtering the optical signal to pass through a selected wavelength of a plurality of selected wavelengths of the optical signal;
- and
- performing the following for each selected wavelength of the plurality of selected wavelengths:
- receiving a plurality of photons of the optical signal at a photo-reactive material, the photo-reactive material operable to produce a reaction in response to the arrival of a predetermined number of photons;
- producing a plurality of reactions in response to the arrival of the plurality of photons;
- and
- generating waveform monitor output in response to the plurality of reactions, the waveform monitor output indicating a waveform quality of the optical signal at the each wavelength.
5 more elements
A signal quality analyzer operable to monitor an optical signal, comprising:
- a tunable filter operable to:
- receive an optical signal;
- and
- filter the optical signal to pass through a selected wavelength of a plurality of selected wavelengths of the optical signal;
- a waveform monitor comprising a photo-reactive material operable to produce a reaction in response to the arrival of a predetermined number of photons, the waveform monitor operable to perform the following for each selected wavelength of the plurality of selected wavelengths:
- receive a plurality of photons of the optical signal;
- produce a plurality of reactions in response to the arrival of the plurality of photons;
- and
- generate waveform monitor output in response to the plurality of reactions, the waveform monitor output indicating a waveform quality of the optical signal at the each wavelength;
- and
- an analyzer operable to:
- establish a waveform quality of the optical signal in accordance with the waveform qualities of the optical signal at the plurality of wavelengths.
9 more elements
A system for monitoring an optical signal, comprising:
- means for receiving an optical signal;
- means for filtering the optical signal to pass through a selected wavelength of a plurality of selected wavelengths of the optical signal;
- and
- means for performing the following for each selected wavelength of the plurality of selected wavelengths:
- receiving a plurality of photons of the optical signal at a photo-reactive material, the photo-reactive material operable to produce a reaction in response to the arrival of a predetermined number of photons;
- producing a plurality of reactions in response to the arrival of the plurality of photons;
- and
- generating waveform monitor output in response to the plurality of reactions, the waveform monitor output indicating a waveform quality of the optical signal at the each wavelength.
5 more elements
A signal quality analyzer operable to monitor an optical signal, comprising:
- a tunable filter operable to:
- receive an optical signal;
- and
- filter the optical signal to pass through a selected wavelength of a plurality of selected wavelengths of the optical signal;
- a splitter operable to:
- receive the optical signal from the tunable filter;
- split the optical signal into a first optical signal and a second optical signal;
- send the first optical signal to a waveform monitor;
- and
- send the second optical signal to a power monitor;
- the waveform monitor comprising a photo-reactive material operable to produce a reaction in response to the arrival of a predetermined number of photons, the photo-reactive material comprising a material operable to release an electron when two photons arrive at substantially the same time at substantially the same place of the material, the photo-reactive material comprising silicon, the waveform monitor operable to perform the following for each selected wavelength of the plurality of selected wavelengths:
- receive a plurality of photons of the optical signal;
- produce a plurality of reactions in response to the arrival of the plurality of photons;
- and
- generate waveform monitor output in response to the plurality of reactions, the waveform monitor output indicating a waveform quality of the optical signal at the each wavelength;
- the power monitor operable to perform the following for the each selected wavelength of the plurality of selected wavelengths:
- receive the optical signal;
- and
- generate power monitor output indicating an optical power of the optical signal at the each selected wavelength;
- and
- an analyzer operable to establish a waveform quality of the optical signal in accordance with the waveform qualities of the optical signal at the plurality of wavelengths by performing the following:
- estimate an optical power of the optical signal at the each selected wavelength;
- normalize the waveform quality at the each selected wavelength in accordance with the optical power at the each selected wavelength;
- determine the waveform qualities of the optical signal at the plurality of wavelengths with each other;
- and
- establish a waveform quality of the optical signal in accordance with the determination.
23 more elements
Dependencies are inferred from the claim text.