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Full light regeneration method of optical four-phase shift key control signals

A phase-shift keying and signal technology, applied in the field of optical communication, can solve the problems that have not yet been discovered, all-optical regeneration is difficult, and signal regeneration cannot be achieved, and achieves the effect of effective regeneration.

Inactive Publication Date: 2008-01-09
BEIHANG UNIV
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Problems solved by technology

But the all-optical regeneration of the optical QPSK signal is more difficult, and its signal is composed of real part and imaginary part at the same time. The above-mentioned all-optical regeneration method will compress the signal in the other direction orthogonal to it to the regeneration of the signal in one direction. Near the origin and cannot be further processed, so signal regeneration cannot be achieved
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  • Full light regeneration method of optical four-phase shift key control signals
  • Full light regeneration method of optical four-phase shift key control signals

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Embodiment Construction

[0025]An implementation of the regeneration method consists of: 50 / 50 fiber split coupler 1, fiber delay line 2, fiber delay line 3, laser pump source 4, laser pump source 5, fiber split coupler 6, optical fiber Split coupler 7, high nonlinear fiber 8, high nonlinear fiber 9, high nonlinear fiber 10, high nonlinear fiber 11, fiber split coupler 12, fiber split coupler 13, 50 / 50 fiber split Coupler 14 (as shown in Figure 2). The 50 / 50 fiber splitter coupler 1 can be a 1×2 fiber coupling splitter or a 1×2 fiber polarization splitter. The power at both ends of its output should be equal. If a polarization splitter is used, the polarization states of other optical signals in the upper and lower paths should be changed accordingly. The two output ends are respectively connected with the fiber delay line 2, the fiber split coupler 6, the high nonlinear fiber 8, the high nonlinear fiber 9, the fiber split coupler 12 and the fiber delay line 3, the fiber split coupler 7, the high T...

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Abstract

The method comprises: the damaged inputted optical signals are divided into two routes via two output end of optic splitter and coupler; one route of signal is connected to the optic delay line (2) and the non-linear optic signal processor(4); the other route of signal is connected to the optic delay line (3) and the non-linear optic signal processor (5); the non-linear optic signal processor (4) and (5) respectively make phase and amplitude compression for the four phase shift keyed signals orthogonal each other in the angular bisector direction to generate two phase shift keyed signals orthogonal each other; said two route of signals is combined to generate the four phase shift keyed signals via an optical multiplexer. The invention can be used to restore the optical four phase shift keyed signals polluted by noise.

Description

Technical field [0001] The invention relates to the technical field of optical communication, in particular to a method for performing all-optical signal regeneration on distorted optical four-phase phase-shift keying signals (including optical differential four-phase phase-shift keying signals). Background technique [0002] Due to its advantages such as high speed and large capacity, optical communication technology has become the main technology in the field of communication. Recently, with the increasing Internet and other data services, high-capacity wavelength division multiplexing (WDM) optical networks have become the main form of optical fiber communication systems. In optical networks, dispersion and nonlinear effects of optical fibers, optical noise generated by optical amplifiers, and crosstalk, noise and nonlinear phenomena generated in nodes such as optical switches, optical add / drop multiplexers (OADM) and optical routers can be Distortion of the transmitted ...

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Application Information

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IPC IPC(8): H04B10/16H04B10/20H04B10/29
Inventor 郑铮刘翔安琳赵欣
Owner BEIHANG UNIV
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