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Optical homodyne coherent receiver and method for receiving multi-channel optical signals

An optical receiver, multi-channel technology, applied in the field of receivers, can solve the problem of difficult to recover optical spectrum and so on

Active Publication Date: 2016-10-19
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in analog electronics, only real signals can be manipulated, therefore, it is not easy to recover the entire optical spectrum

Method used

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  • Optical homodyne coherent receiver and method for receiving multi-channel optical signals
  • Optical homodyne coherent receiver and method for receiving multi-channel optical signals
  • Optical homodyne coherent receiver and method for receiving multi-channel optical signals

Examples

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Embodiment Construction

[0022] figure 2 According to an embodiment of the solution, it is shown receiving an exemplary multi-channel optical signal O B An exemplary optical homodyne receiver 200. The optical receiver 200 is preferably a coherent receiver. The optical receiver 200 is preferably a polarization diversity receiver.

[0023] as in figure 2 As can be seen in , the demonstration received optical signal O B included at frequency f LO The main optical carrier signal and a plurality of optical channels (for example, the first optical channel A, the second optical channel B, the third optical channel C, the fourth optical channel D), each channel includes the optical subcarrier f LO -f 2 , f LO -f 1 , f LO +f 1 , f LO +f 2The set of information carried. Each subcarrier has preferably been modulated with a signal comprising said information set. The modulating signal may be, for example, an electrical RF signal. As is well known to those skilled in the art, the multi-channel opt...

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PUM

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Abstract

A receiver arrangement for receiving an optical signal comprising a number of optical channels equally distributed around an optical carrier frequency. The arrangement is configured to: i) received and detect the multichannel optical signal so as to provide at least one electrical quadrature signal comprising at least one folded channel, wherein each folded channel correspond to a set of two optical channels collapsed onto each other; ii) up-convert said at least one electrical quadrature signal so as to provide at least one up-converted quadrature signal comprising at least one pair of two separated unfolded channels, wherein each pair correspond to the two optical channels of a unique folded channel; and iii) demodulating said at least one up-converted quadrature signal so as to provide one baseband quadrature signal for each un folded channel such that each baseband quadrature signal corresponds to one unique optical channel.

Description

technical field [0001] The present disclosure relates to fiber optic communications, and in particular, to methods for receiving optical multi-channel signals and receivers for performing the methods. Background technique [0002] Today, high-capacity communications via optical fibers are commonly used, and optical networks using optical fibers have become widely used since they are suitable for handling rapidly increasing communications for various multimedia services or similar services requiring high bandwidth. In conclusion, it is fair to say that there is growing interest in the transmission of large amounts of information with high spectral efficiency in the optical domain. [0003] Today's optical transmission systems therefore use advanced modulation formats such as Quadrature Phase Shift Keying (QPSK) and 16-Quadrature Amplitude Modulation (16-QAM) and similar formats. Here, the information is carried in the amplitude and phase of the light field rather than in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/61H04B10/63
CPCH04B10/616H04B10/613H04B10/63
Inventor B-E.奥尔森
Owner TELEFON AB LM ERICSSON (PUBL)
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