Monitoring wavelength dispersion variation using photon absorption
AssigneeFujitsu Limited
InventorsCechan Tian, Susumu Kinoshita
Life of this patent
Estimating the term…
Abstract
Monitoring wavelength dispersion variation of an optical signal includes receiving the optical signal at a detector. The optical signal comprises photons of different spectrum components. The photons are received at a material of the detector. The material is operable to produce a reaction in response to the arrival of a predetermined number of photons. Reactions produced by the material in response to receiving the plurality of photons are monitored. Whether there is wavelength dispersion variation among the components is established in accordance with the reactions.
Claims22
A method for monitoring wavelength dispersion variation of an optical signal, comprising:
- receiving at a detector an optical signal transmitted as a plurality of light pulses, the optical signal comprising a plurality of components, the optical signal comprising a plurality of photons;
- receiving the plurality of photons at a material of the detector, the material operable to produce a reaction in response to the arrival of a predetermined number of photons of the plurality of photons;
- monitoring a plurality of reactions produced by the material in response to receiving the plurality of photons;
- and
- establishing whether there is wavelength dispersion variation among the plurality of components in accordance with the reactions.
A system for monitoring wavelength dispersion variation of an optical signal, comprising:
- a detector operable to receive an optical signal transmitted as a plurality of light pulses, the optical signal comprising a plurality of components, the optical signal comprising a plurality of photons, the detector comprising a material operable to:
- receive the plurality of photons;
- and
- produce a reaction in response to the arrival of a predetermined number of photons of the plurality of photons;
- and
- a monitor coupled to the detector and operable to:
- monitor a plurality of reactions produced by the material in response to receiving the plurality of photons;
- and
- establish whether there is wavelength dispersion variation among the plurality of components in accordance with the reactions.
An integrated circuit for monitoring wavelength dispersion variation of an optical signal, comprising:
- a wave separator operable to:
- receive an optical signal transmitted as a plurality of light waves, the optical signal comprising a plurality of components, a light wave comprising a plurality of photons;
- and
- separate the plurality of light waves;
- and
- a plurality of wave monitors coupled to the wave separator, a wave monitor comprising:
- a detector operable to receive a light wave of the plurality of light waves, the detector comprising a material operable to:
- receive the plurality of photons;
- and
- produce a reaction in response to the arrival of a predetermined number of photons of the plurality of photons;
- and
- a monitor coupled to the detector and operable to:
- monitor a plurality of reactions produced by the material in response to receiving the plurality of photons;
- and
- establish whether there is wavelength dispersion variation among the plurality of components in accordance with the reactions.
A system for monitoring wavelength dispersion variation of an optical signal, comprising:
- means for receiving at a detector an optical signal transmitted as a plurality of light pulses, the optical signal comprising a plurality of components, the optical signal comprising a plurality of photons;
- means for receiving the plurality of photons at a material of the detector, the material operable to produce a reaction in response to the arrival of a predetermined number of photons of the plurality of photons;
- means for monitoring a plurality of reactions produced by the material in response to receiving the plurality of photons;
- and
- means for establishing whether there is wavelength dispersion variation among the plurality of components in accordance with the reactions.
A system for monitoring wavelength dispersion variation of an optical signal, comprising:
- a detector operable to receive an optical signal transmitted as a plurality of light pulses, the optical signal comprising a plurality of components, the optical signal comprising a plurality of photons, the detector comprising:
- an optical fiber having a tapered end and operable to focus the optical signal;
- and
- a material operable to:
- receive the plurality of photons;
- produce a reaction in response to the arrival of a predetermined number of photons of the plurality of photons;
- and
- generate a current in response to the plurality of reactions, the material having a band gap energy corresponding to a photon energy of the predetermined number of photons, the material operable to:
- generate an electron hole-pair if the predetermined number of photons are received at substantially the same time;
- and
- fail to generate the electron hole-pair if the predetermined number of photons are not received at substantially the same time;
- and
- a monitor coupled to the detector and operable to:
- monitor a plurality of reactions produced by the material in response to receiving the plurality of photons by measuring the current;
- and
- establish whether there is wavelength dispersion variation among the plurality of components in accordance with the reactions by:
- determining if there is a change in the reactions produced by the material;
- and
- establishing that there is wavelength dispersion variation if there is a change.
Dependencies are inferred from the claim text.