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LCOS adjusting method, optical device and reconfigurable optical add drop multiplexer

An adjustment method and grating technology, applied in the field of optical communication, can solve problems such as crosstalk

Active Publication Date: 2021-11-26
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In practical applications, the grating formed by LCOS will produce a reflected beam in a different direction from the reflected beam 105, resulting in crosstalk

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  • LCOS adjusting method, optical device and reconfigurable optical add drop multiplexer
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  • LCOS adjusting method, optical device and reconfigurable optical add drop multiplexer

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Embodiment Construction

[0048] The embodiment of the present application provides an LCOS adjustment method, an optical device and a reconfigurable optical add-drop multiplexer, which are applied in the field of optical communication and can reduce crosstalk.

[0049] LCOS includes many pixels. Applying different voltages to the pixels can form different phase delays. When a gradient voltage is applied to a series of continuous pixels, the diffraction effect of the physical grating can be simulated to form the gray distribution of the grating. . The gray level distribution of the grating is also called the phase distribution. The grayscale distribution of the grating includes the corresponding relationship between the gradient voltage and the pixel points. Visually speaking, the gray distribution of the grating includes the period of the grating, the starting point of the period of the grating, and the maximum phase of the grating. Wherein, the starting point of the period of the grating can be und...

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Abstract

The embodiment of the invention discloses an LCOS adjusting method, which is applied to the field of optical communication. The LCOS adjusting method comprises the steps that boundary lines of gray level distribution of gratings on a first area are adjusted so that first light spots cover the boundary lines of the gray level distribution of the gratings as few as possible, the first area is one area of K * H areas of LCOS, K is an integer larger than 0, H is an integer larger than 1, and the LCOS is loaded with the gray level distribution of the gratings; and the first area is an area where the first light signal forms a first light spot, and the first area is used for redirecting the first light signal, wherein the boundary lines of the gratings can generate crosstalk, and the boundary lines of the gratings in the first area are adjusted so that the first light spot covers the boundary lines of the gratings as few as possible, and the crosstalk can be reduced.

Description

technical field [0001] The present application relates to the field of optical communication, in particular to a liquid crystal on silicon (LCOS) regulation method, an optical device and a reconfigurable optical add / drop multiplexer. Background technique [0002] LCOS is a very small matrix liquid crystal device based on reflective mode. This matrix liquid crystal device is fabricated on a silicon chip using complementary metal oxide semiconductor (CMOS) technology. [0003] LCOS is usually included in optical devices such as wavelength selective switch (wavelength selective switch, WSS) or dynamic gain flatness filter (dynamic gain flatness filter, DGFF) that use phase adjustment of optical signals. The working principle of LCOS is to load different voltages on different pixels of LCOS. Due to the birefringence effect of liquid crystal, different voltages will correspond to different phase delays, thus forming a grating-like structure. By applying a periodic voltage along...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/139
CPCG02F1/1393G02F2201/30G02F2203/05G02F1/139
Inventor 毛磊宗良佳常泽山
Owner HUAWEI TECH CO LTD