A kind of optical module coupling method

Abstract

The present invention relates to the technical field of optical module coupling, and provides an optical module coupling method, comprising the following steps: S1, using a small-aperture optical fiber to receive focused laser light, and in an initial state, the focused spot of the laser light falls at least partially within the Outside the small-aperture fiber; S2, monitor the coupling power, and adjust the angle at which the laser enters the small-aperture fiber according to the monitored coupling power; S3, with the adjustment of the laser incident angle, the coupling power will gradually become normal. When the monitored coupling power value is normal, the small-aperture fiber is replaced with a normal-aperture fiber. The optical module coupling method of the present invention adjusts the angle of incident light by adopting a small-aperture optical fiber and cooperating with the monitoring of the coupling power, which can ensure that the incident angle of the converging light spot is facing the center of the optical fiber, thereby avoiding the loss of high-order modes during transmission. .

Description

technical field [0001] The invention relates to the technical field of optical module coupling, in particular to an optical module coupling method. Background technique [0002] With the continuous popularization of the Internet, optical fiber communication technology has played an important role in the communication network due to its characteristics of transmission frequency bandwidth, long transmission distance, large communication capacity, high quality, low loss and strong anti-interference ability. Research hotspots in related fields at home and abroad. Optical modules, as an important component of the optical fiber communication transmission process, are developing rapidly in the direction of miniaturization, low cost, low loss, high speed, and long distance. [0003] Optical modules are mainly used in data centers for photoelectric conversion and data transmission. When optical modules perform data transmission, the corresponding electrical signals need to be conver...

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Problems solved by technology

[0004] When the optical module performs lens coupling, the general method is to connect a normal optical fiber on the side of the lens as the optical transmission coupling channel, and after the light emitted by the measured laser is focused by the lens, the spot diameter is smaller than the normal optical fiber transmission aperture, so when optical fiber coupling , there is a certain probability that the light spot will eventually be coupled to the edge of the fiber transmission aperture. When the light spot is coupled to the edge of the fiber transmission hole, the fiber can still transmit power, but a part of the light will be transmitted at the edge of the fiber cladding during the transmission process. Part of the light is high-order mode light, which is easy to lose this high-order mode during subsequent transmission. This is the shortcoming of conventional optical module coupling

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