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Dynamic-tuning dispersion compensator

A kind of dispersion compensator, dynamic technology, applied in the direction of cladding fiber, optical waveguide light guide, etc., can solve the problems of difficult adjustment purpose, complex structure, creeping effect, etc., to achieve the effect of simple structure, high compensation efficiency and good stability

Inactive Publication Date: 2007-09-05
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, the structure of this scheme is complicated. In order to realize the tunable dispersion compensation function, that is, to adjust different dispersion compensation amounts according to the wavelength of the incident light, it is necessary to use a piezoelectric sensor, that is, a piezoelectric ceramic shifter to adjust the cavity distance of the F-P cavity. In this way, it is easy to produce the creep effect and hysteresis effect brought by the piezoelectric ceramic displacement device, and it is difficult to achieve the adjustment purpose accurately and quickly.

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing and example the present invention is described in further detail.

[0013] Existing dispersion compensators are mainly composed of F-P cavity, the light is input into the F-P cavity through the input fiber and reflected multiple times to introduce dispersion compensation, and the light is output through the output fiber. It is deduced from the optical theory that the amount of dispersion compensation is related to the cavity distance, the incident angle of light and the reflectivity of the coating at both ends of the F-P cavity. When λ=(2ndcosθ) / m(m=1, 2, 3...) (n is the refractive index of air, d is the cavity distance, θ is the incident angle of light), the intensity of the reflected light field is the lowest, and the delay value is the largest. The dispersion value is zero. We call this wavelength the resonance wavelength. Near the resonance wavelength, the time delay has approximately linear rising and falling edges, ...

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Abstract

A scattering compensator of dynamic tunable type is prepared as placing one metal circular film at internal surface of a glass sheet on G-T cavity and another metal circular film at internal surface of another glass sheet on G-T cavity, using power supply to provide operation power on said metal circular film, inputting light into G-T cavity to carry out multiple reflection there by input optical fiber and then outputting light out by output optical fiber.

Description

technical field [0001] The invention belongs to the field of dispersion compensation processing in an optical fiber transmission system, and in particular relates to a dynamically tunable dispersion compensator. Background technique [0002] With the rapid development of optical fiber communication, the user's demand for communication capacity is increasing day by day, and the channel rate is constantly increasing. In the future, the communication capacity demand of each user will exceed 100Mbit / s. Driven by this demand, optical fiber communication, which is the main body of modern long-distance trunk line communication, has been developing towards high speed, large capacity and long distance. While the single-channel rate continues to increase, dense wavelength division multiplexing technology is also becoming more mature and commercialized. [0003] With the successful development of erbium-doped fiber amplifiers, fiber loss no longer plays a major role in limiting the tr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02
Inventor 王涛李菁刘德明黄丹
Owner HUAZHONG UNIV OF SCI & TECH