Progressive mode search coupling method based on visual guidance and active mode

Abstract

The invention relates to a progressive mode search coupling method based on visual guidance and an active mode. The method comprises the following steps: 1, calibrating a vertical camera coordinate system; 2, calibrating a horizontal camera coordinate system; 3, aligning the two coordinate systems; 4, measuring the optical power of the laser to form a standard optical power value table; 5, measuring the current value converted by the integrating sphere to form a measured current value table; 6, fitting a linear relation between the measured current value table and the standard power value table, and storing the linear relation; 7, determining the central position of a light outlet of the laser; and 8, adjusting the position of the optical fiber, obtaining the position of the optical fiber at the maximum measurement current value, and completing the coupling process. In a laser fiber coupling process, the self-adjustment of relative positions of the fiber and the laser is realized, so that the fiber can be smoothly aligned with a light emitting center in the laser, high-precision coupling is performed, collision between the fiber and the laser is avoided, direct large-range coupling and fiber damage under high power are effectively avoided, the coupling efficiency is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of fiber laser coupling and packaging, in particular to a progressive mode search coupling method based on visual guidance and active modes. Background technique [0002] With the wide application of products such as laser cutting and high-speed optical modules, high-power lasers have been greatly developed. High-power fiber coupling technology usually uses multi-light source array and spatial beam combining technology to couple multiple light sources into an optical fiber. The current coupling technology mostly adopts the alignment method of active optical fiber, and the power meter is connected to the optical fiber output end for detection, and the laser light source is coupled with the optical fiber by manually adjusting the six-dimensional optical platform. Due to the uncertain position of the focused spot, the effective receiving area of ​​the fiber end face is only 62.5 microns in diameter and the num...

AI Technical Summary

Problems solved by technology

Traditional high-power lasers mostly use manual coupling, and the coupling of multiple current points often takes a lot of time, labor intensity is high, and the yield rate of coupling is difficult to guarantee

At the same time, due to the high output power of the laser transmitting end, the position of the optical fiber is slightly inaccurate, and it is easy to be broken down and burned

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