Optical communication system
OwnerBrett Spivey, James Mendersinventors
Life of this patent
Estimating the term…
Abstract
A high speed optical receiver for receiving a substantially diminished optical signal. An optical amplifier amplifies the diminished optical signal at least several db and an ultra narrow-band filter filters the noise generated in the optical amplifier to produce a filtered amplified optical signal which is detected by a fast response photo detector. In a preferred embodiment the optical amplifier is a semiconductor laser amplifier. In this embodiment a Faraday filter provides the ultra narrow-band filtering, virtually eliminating the noise produced by the amplifier. Transmitters are described for transmitting information at a wavelength tuned to the ultra narrow-band filters.
Claims13
A high speed optical receiver for receiving a substantially diminished optical signal comprising:
- an optical amplifier for amplifying said diminished optical signal at least several db,
- an ultra narrow-band filter for filtering noise generated in said optical amplifier to produce a filtered amplified optical signal, said ultra narrow-band filter being an atomic line filter, and
- a fast response photo detector for detecting said filtered amplified optical signal.
A high speed optical receiver for receiving a substantially diminished optical signal comprising:
- a semiconductor optical amplifier for amplifying said diminished optical signal at least several db,
- a Faraday filter for filtering noise generated in said optical amplifier to produce a filtered amplified optical signal and
- a fast response photo diode for detecting said filtered amplified optical signal.
An optical communication system comprising:
- A) a high speed optical receiver for receiving a substantially diminished optical signal comprising:
- 1) a semiconductor optical amplifier for amplifying said diminished optical signal at least several db,
- 2) a Faraday filter defining a passband for filtering noise generated in said optical amplifier to produce a filtered amplified optical signal and
- 3) a fast response photo diode for detecting said filtered amplified optical signal;
- and
- B) a high speed optical transmitter for transmitting optical signals on a light beam to said receiver comprising:
- 1) a light source for producing light beam at a wavelength matched to the passband of said Faraday filter,
- 2) an optical modulator for modulating said light beam to impose said optical signals on said beam.
Dependencies are inferred from the claim text.