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System and method for receiving coherent, polarization-multiplexed optical signals

一种光信号、接收器的技术，应用在光相干通信系统领域，能够解决偏振分集接收器降低制造成本等问题

Active Publication Date: 2009-07-08
NOKIA OF AMERICA CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

More specifically, current technology requires polarization diversity receivers with reduced manufacturing costs

Method used

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  • System and method for receiving coherent, polarization-multiplexed optical signals
  • System and method for receiving coherent, polarization-multiplexed optical signals
  • System and method for receiving coherent, polarization-multiplexed optical signals

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Embodiment Construction

[0015] initial reference figure 1 Shown is a block diagram of a polarization diversity receiver, generally designated 100, configured to demodulate a received optical signal S110 and convert the optical signal S110 into electrical signals representing in-phase and quadrature components of S110 , the optical signal is coherent and polarization-multiplexed. Unlike conventional polarization diversity receivers, receiver 100 requires only one optical hybrid.

[0016] Receiver 100 receives S 110 and demodulates S 110 using a coherent, local oscillator optical signal L0 120 . S 110 and L0 120 are received into optical section 130, which may include a polarization insensitive optical hybrid. The optical section 130 will be in image 3 S 110 and L0 120 are split and coupled in the manner shown in , to produce at least two output optical signals respectively provided to detectors 140, 150, which are photodetectors such as photodiodes. Next, the detectors 140, 150 provide electrical...

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PUM

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Abstract

An apparatus, a polarization diversity receiver and a method of receiving a received optical signal. In one embodiment, the apparatus includes: (1) an optical device configured to separate in-phase and quadrature components of a received optical signal, to transmit the in-phase components to a first optical output thereof and to transmit the quadrature components to a second optical output thereof, (2) a first polarization splitter coupled to receive light at the first optical- output and (3) a second polarization splitter coupled to receive light at the second optical output.

Description

technical field [0001] The present invention relates generally to optical coherent communication systems, and more particularly to systems and methods for receiving coherent, polarization-multiplexed optical signals. Background technique [0002] Optical coherent communication systems have been extensively studied due to their potential ability to rapidly transmit large amounts of information. In optical coherent communication systems, a so-called "optical mixer" is used to superimpose the received optical signal and the local oscillator optical signal, resulting in demodulation of the received optical signal and producing in-phase components I and I and the quadrature components Q and Q . These components I, I , Q and Q converted into electrical signals. This configuration is sometimes called a "phase diversity receiver". Electronic logic circuitry may then be used to compare the electronic signal to another electronic signal, or to one or more thresholds, or both, to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/148
CPCH04B10/613H04B10/63H04B10/61H04B10/614H04B10/67
Inventor N·卡内达A·B·利文
Owner NOKIA OF AMERICA CORP
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