Optical communication apparatus and system
First Claim
1. A communication apparatus adapted for transmitting and receiving optical signals and comprising at least one CW laser, at least one optical transmitter and at least one heterodyne optical receiver, wherein a first portion of the output of said at least one CW laser is used for providing a local oscillator light source for said at least one heterodyne optical receiver and wherein a second portion of the output of said at least one CW laser is used as a light source for said at least one optical transmitter, and wherein said heterodyne optical receiver is adapted to receive optical signals irrespective of their polarization state.
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Accused Products
Abstract
A method and apparatus for transmitting and receiving optical signals. The apparatus comprises at least one CW laser, at least one optical transmitter and at least one polarization independent heterodyne optical receiver. A first portion of the output of the CW laser is used for providing a local oscillator light source for the heterodyne receiver and a second portion of the output of the CW laser is used as a light source for the transmitter.
31 Citations
27 Claims
- 1. A communication apparatus adapted for transmitting and receiving optical signals and comprising at least one CW laser, at least one optical transmitter and at least one heterodyne optical receiver, wherein a first portion of the output of said at least one CW laser is used for providing a local oscillator light source for said at least one heterodyne optical receiver and wherein a second portion of the output of said at least one CW laser is used as a light source for said at least one optical transmitter, and wherein said heterodyne optical receiver is adapted to receive optical signals irrespective of their polarization state.
- 13. A communication system adapted for transmitting signals between at least a first apparatus located at at least a first location and a at least a second apparatus located at at least a second location over an optical network, wherein each of said first apparatus is adapted for transmitting and receiving optical signals and each of said first apparatus comprises at least one CW laser, at least one optical transmitter and at least one polarization independent, heterodyne optical receiver, which apparatus is characterized in that a first portion of the output of said at least one CW laser of the at least first apparatus is used for providing local oscillator light source for said at least one heterodyne optical receiver of said first apparatus and wherein a second portion of the output of the at least one CW laser is used as a light source for said at least one optical transmitter of said first apparatus.
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22. A method for operating an optical communication link extending between a first unit located at a first location and at least one second unit located at at least one second location, wherein said first unit comprises at least one CW laser, at least one optical transmitter and at least one polarization independent, heterodyne optical receiver, which method comprises:
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a. allocating a portion of the output of said at least one CW laser of said first unit for providing local oscillations for said at least one heterodyne optical receiver of said first unit; and
b. allocating another portion of the output of said at least one CW laser of said first unit for use as a light source for said at least one optical transmitter of the first unit. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification