Optical fiber nonlinearity and dispersion effect compensating device with resonant cavity

A dispersion effect and compensation device technology, applied in optical fiber transmission, elimination of distortion/dispersion, electromagnetic wave transmission system, etc., can solve the problems of high complexity, inability to realize nonlinear and dispersion compensation, and large amount of calculation, etc., to achieve nonlinear enhancement , small size, enhanced effect of non-linear characteristics

Inactive Publication Date: 2014-09-17
TONGJI UNIV
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Problems solved by technology

Although this type of method can better compensate for the dispersion and nonlinear effects of optical fibers, for ultra-high-speed, ultra-long-distance optical fiber transmis

Method used

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  • Optical fiber nonlinearity and dispersion effect compensating device with resonant cavity
  • Optical fiber nonlinearity and dispersion effect compensating device with resonant cavity
  • Optical fiber nonlinearity and dispersion effect compensating device with resonant cavity

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Embodiment

[0029] Such as figure 1 As shown, a fiber optic nonlinearity and dispersion effect compensation device with a resonant cavity includes an optical fiber 7, a circulator 1, a fiber-waveguide coupler 2, a silicon waveguide 3, a waveguide coupler 4, a resonant cavity 5 and a chirped grating 6. The optical fiber 7, circulator 1, fiber-waveguide coupler 2, silicon waveguide 3 and chirped grating 6 are sequentially connected, and the waveguide coupler 4 is arranged between the silicon waveguide 3 and the resonant cavity 5;

[0030] The resonant cavity 5 uses its nonlinear optical characteristics to generate a nonlinear phase shift to compensate the nonlinear effect of the optical fiber; the grating period of the chirped grating 6 changes along the axial direction, which can make incident light of various wavelengths Reflecting at different positions produces a large group delay slope and compensates for the dispersion effect of the fiber.

[0031] The resonant cavity 5 utilizes its...

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PUM

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Abstract

The invention relates to an optical fiber nonlinearity and dispersion effect compensating device with a resonant cavity. The optical fiber nonlinearity and dispersion effect compensating device with the resonant cavity comprises an optical fiber and further comprises a circulator, an optical fiber-waveguide coupler, a silicon waveguide, a waveguide coupler, the resonant cavity and a chirp grating. The optical fiber, the circulator, the optical fiber-waveguide coupler, the silicon waveguide and the chirp grating are connected in sequence. The waveguide coupler is arranged between the silicon waveguide and the resonant cavity. The resonant cavity generates nonlinear phase shift through the nonlinear optical characteristics of the resonant cavity so as to compensate for the nonlinear effect of the optical fiber. The grating period of the chirp grating changes in the axial direction and enables incident light with different wavelengths to be reflected at different positions, so that a large group delay slope is generated, and the dispersion effect of the optical fiber is compensated for. Compared with the prior art, the optical fiber nonlinearity and dispersion effect compensating device with the resonant cavity has the advantages of real-time compensation, a small size, easy expansion and the like.

Description

technical field [0001] The invention relates to a compensation device for optical fiber nonlinearity and dispersion effect, in particular to a compensation device for optical fiber nonlinearity and dispersion effect with a resonant cavity. Background technique [0002] Such as figure 2 As shown, the optical fiber communication system is mainly composed of three parts: transmitter, optical fiber transmission and receiver. The transmitter includes a light source and a modulator. The signal sent by the transmitter is transmitted through N-segment optical fiber links, and an amplifier is required for each transmission segment. The signal is amplified to compensate for the attenuation in the transmission process, and the signal transmitted through the optical fiber is received by the receiver. The function of the receiver is to compensate the dispersion and nonlinear effects of the received signal, and resolve it through the coherent demodulation module. to restore the original ...

Claims

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Application Information

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IPC IPC(8): H04B10/2513H04B10/2543
Inventor 周俊鹤操砚茹
Owner TONGJI UNIV
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