Flexible-grid tunable dispersion compensation device based on liquid crystal array
A liquid crystal array and compensation device technology, applied in the directions of light guides, optics, instruments, etc., can solve the problems of increasing system costs, failing to meet the development needs of optical communication network systems, increasing the difficulty of processing and control, etc., and achieving a flexible and adjustable dispersion compensation value. tuning effect
Active Publication Date: 2015-04-29
GUANGXUN SCI & TECH WUHAN
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Problems solved by technology
The design of the LCOS chip in another dimension increases the difficulty of processing and control, and also increases the cost of the system. This limitation also limits the further promotion and application of the dispersion compensation device.
[0005] Traditional dispersion compensation devices are mostly based on fixed frequency grids, which can no longer meet the development needs of existing optical communication network systems, especially systems developed to 400Gb / s or above require flexible and adjustable transmission frequency intervals
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[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0044]A flexible grid tunable dispersion compensation device based on a liquid crystal array, including a circulator 1, a collimator 2, a polarization conversion component 3, a convex lens component 4, a concave mirror 5, a diffraction grating 6, a mirror 8, and a plurality of liquid crystals An array chip 7 and an integrated circuit chip 9 . Among them, the circulator 1 is respectively used as the input end and the output end of the dispersion compensation device; the fiber collimator 2 is used to collimate and output the incoming fiber signal; the polarization conversion component 3 includes a bi...
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The invention discloses a tunable dispersion compensation device based on a liquid crystal array. The device comprises an input / output device, a polarization conversion assembly (3), a light spot transformation system, a flexible-grid tunable dispersion compensator and a reflector (8) which are sequentially arranged along the light path, wherein light with a random polarization signal and two beams of linearly polarized light with polarization directions perpendicular to each other are mutually converted by the aid of the polarization conversion assembly (3), different wavelengths of light signals are separated and multiplexed in the space by the aid of the light spot transformation system, the flexible-grid tunable dispersion compensator performs flexible-grid tunable dispersion compensation on the different wavelengths of light signals, the reflector enables all the light signals emitted onto the surface of the reflector to return along the original light path. With the adoption of the device, flexible tuning of channel grids, dispersion compensation curves and dispersion compensation values can be realized.
Description
technical field [0001] The invention relates to a tunable dispersion compensation device, in particular to a tunable dispersion compensation device based on a liquid crystal array with flexible and adjustable grids, flexible and adjustable dispersion compensation values, and flexible and adjustable dispersion compensation curves. The invention belongs to field of optical fiber communication. Background technique [0002] In the optical fiber transmission system, dispersion will broaden the optical pulse, causing interference between different optical pulses, and affecting the performance of the optical fiber transmission system. Moreover, with the rapid increase of the transmission rate, the dispersion tolerance of the system is constantly decreasing. Optical fiber dispersion has become one of the important factors restricting the further improvement of communication rate. The network structure of the optical fiber communication system is also changing, from the traditiona...
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Login to View More IPC IPC(8): G02B6/293G02F1/133
CPCG02B6/29304G02B6/29394G02F1/1313
Inventor 袁志林杨柳杨睿孙莉萍张博宋丽丹郭金平王凡唐丽红马雨虹
Owner GUANGXUN SCI & TECH WUHAN