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Optical fiber coupling method based on CCD and optical power meter

An optical power meter, fiber coupling technology, applied in the field of space optical communication, can solve the problem of slow convergence speed of fiber coupling, and achieve the effect of fast convergence speed

Inactive Publication Date: 2019-05-17
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a fiber coupling method based on CCD and optical power meter to solve the problem of slow convergence speed of existing fiber coupling

Method used

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  • Optical fiber coupling method based on CCD and optical power meter
  • Optical fiber coupling method based on CCD and optical power meter
  • Optical fiber coupling method based on CCD and optical power meter

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Embodiment Construction

[0021] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, the present invention includes a tilting mirror, an image acquisition module, an optical power meter, and a controller module, aiming to solve the problem of too slow convergence speed of the traditional fiber coupling method. Among them, the tilting mirror is used as the actuator of the system to correct the light beam; the image acquisition module is responsible for collecting the position of the spot and outputting the off-target information of the spot position; the optical power meter is used for collecting the optical energy coupled by the optical fiber, and the controller module is responsible for controlling the entire system Iterative update parameters.

[0023] Such as figure 2 As shown, the specific process of the fiber coupling method based on CCD and optical power meter is as fol...

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Abstract

The invention provides an optical fiber coupling method based on a CCD and an optical power meter. A system comprises a tilting mirror, an image acquisition module, the optical power meter and a controller module, and the method aims at solving a problem that the convergence speed of a conventional optical fiber coupling method is too low. According to the method, stochastic disturbances (formula)are applied to the tilting mirror simultaneously, and the change amount of the optical power meter J after the disturbances are applied is computed, so that an approximate gradient (formula) of an objective function is obtained, a miss distance x / y of the center of a light spot is obtained through the CCD, the miss distance x / y and the approximate gradient are fused, and a corrected gradient (formula) is obtained. The corrected gradient is controlled through a stochastic parallel gradient descent algorithm, and the control amount of the tilting mirror is updated iteratively.

Description

technical field [0001] The invention relates to the technical field of space optical communication, in particular to an optical fiber coupling method based on a CCD and an optical power meter, which mainly speeds up the convergence speed of optical fiber coupling through data fusion of the CCD and the optical power meter. Background technique [0002] As an emerging communication technology, Free Space Optical Communication has become a research hotspot due to its advantages of high bandwidth, high security, and no frequency band license. With the continuous development of optical fiber technology, more and more optical fiber technology and devices are applied to laser communication systems, which greatly improves the performance and flexibility of laser communication terminals. Coupling spatial light into single-mode fiber is of great significance for subsequent optical processing, such as amplification and filtering. Due to the long working distance of general laser commu...

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Application Information

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IPC IPC(8): G02B27/00
Inventor 胡钦涛毛耀周国忠乔琦聂康周翕李志俊张超段倩文何秋农
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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