HIGH-EFFICIENCY PARALLEL-BEAM LASER OPTICAL FIBER DRAWING METHOD AND OPTICAL FIBER

摘要

The present invention relates to the technical field of optical fiber laser transmission and amplification. Provided are a high-efficiency parallel-beam laser optical fiber drawing method and optical fiber, the method comprising the steps of: S1: providing base planes on the side surfaces of both a gain optical fiber preform and a pump optical fiber preform, inwardly processing the base plane of the gain optical fiber preform to make a plurality of ribs protrude, the planes at two sides of each rib being machined surfaces, and inwardly providing a plurality of grooves on the base plane of the pump optical fiber preform, the ribs fitting the grooves; S2: embedding the ribs of the gain optical fiber preform into the grooves of the pump optical fiber preform, tapering and fixing one end of the combination of the ribs and the grooves to form a parallel-beam laser optical fiber preform; S3: drawing the parallel-beam laser optical fiber preform into parallel-beam laser optical fibers. The process of the present invention has high repeatability, and the obtained parallel-beam laser achieves peelability of pump optical fibers in a set area, thus facilitating multi-point pump light injection in the length direction of parallel-beam laser optical fibers.