Tapered optical fiber based high-power optical fiber end cap

Abstract

A tapered optical fiber based high-power optical fiber end cap comprises a tapered optical fiber, a quartz block and an end cap housing, wherein a big end of the tapered optical fiber passes through one end of the end cap housing into the end cap housing and then is fixed to the end cap housing; a chamber in which the quartz block extends is formed in the other end of the end cap housing; the end, extending into the end cap housing, of the quartz block is a tapered table shaped end head; the end, extending out of the end cap housing, of the quartz block is cylindrical; an anti-reflection film coats the surface of the cylindrical end, extending out of the end cap housing, of the quartz block; the tapered table shaped end head of the quartz block is fused with the big end of the tapered optical fiber; an output end cap protecting window is arranged on the end cap housing section at the end, extending out of the end cap housing, of the quartz block; the cylindrical end, extending out of the end cap housing, of the quartz block is closed through the output end cap protecting window. The tapered optical fiber based high-power optical fiber end cap is simple in structure, and capable of improving the laser power bearing capacity of the optical fibers, and remains high laser beam quality while effectively inhibiting nonlinear effect.

Description

technical field [0001] The invention belongs to the field of fiber laser and relates to a high-power fiber end cap based on a tapered fiber. Background technique [0002] In the late 1980s, with the maturity of optical fiber manufacturing technology and the development of solid-state lasers, fiber lasers began to become a research hotspot, and with the maturity of double-clad fiber and cladding pumping technology, high-power fiber lasers began Make breakthrough progress. Because fiber lasers have the advantages of small size, light weight, convenient thermal management, and good beam quality, in recent years, high-power fiber lasers with fiber output have been used in optical communications, material processing, medical diagnosis and treatment, information storage, laser printing, and laser measurement and control. , laser spectroscopy and nonlinear frequency conversion and other fields have been widely used. [0003] As the output power of fiber lasers continues to increa...

AI Technical Summary

Problems solved by technology

The thresholds of these two nonlinear effects are closely related to the length of the fiber in the fiber optic system. After the end cap is added, due to the increase in the overall fiber length, the interaction distance of the nonlinear effects in the fiber core becomes longer, making the threshold of the nonlinear effect Greatly reduced, thus limiting the application of this traditional fiber end cap in high-power fiber laser systems, especially single-mode high-beam quality fiber laser systems

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