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High-power optical fiber side pumping coupler and manufacture method thereof

A side pumping and coupler technology, which is applied to lasers, laser parts, phonon exciters, etc., can solve the problems of large coupling loss, poor reliability, and inconvenient production, so as to reduce insertion loss and improve stability and reliability. performance, the effect of a simple coupling structure

Active Publication Date: 2010-07-14
广州奥鑫通讯设备有限公司
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Problems solved by technology

[0004] The present invention aims to provide a high-power fiber optic side-pumped coupler and its manufacturing method, which solves the problems of poor reliability, large coupling loss, and inconvenient production in common side-pumping technologies, so as to meet the needs of high-power fiber lasers and amplifiers

Method used

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  • High-power optical fiber side pumping coupler and manufacture method thereof
  • High-power optical fiber side pumping coupler and manufacture method thereof
  • High-power optical fiber side pumping coupler and manufacture method thereof

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Choose a 105 / 125μm multimode fiber and a 5 / 130 / 250μm double-clad fiber, where the multimode fiber is used as the pump input fiber. First, the coating layer of one end of the multimode fiber (about 30mm long) is peeled off, and it is pulled down into a tapered shape at high temperature; The layer is stripped off, and then the tapered end of the prepared pump fiber is helically wound on the inner cladding side of the coupling part of the double-clad fiber (see figure 2 ); carry out hydrogen-oxygen flame heating and melting on the double-clad coupling part wrapped with the pumping fiber, inject pump light into the multimode fiber at the same time, and monitor the optical power output of the double-clad fiber, when the coupling efficiency of the pumping light When it is the highest (generally 93% to 95%), stop heating, pay attention to mastering the production pro...

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Abstract

The invention relates to a high-power optical fiber side pumping coupler and a manufacture method thereof. The high-power optical fiber side pumping coupler comprises a double-cladding optical fiber and a multimode optical fiber or a plurality of multimode optical fibers, wherein the multimode optical fiber is a pumping input optical fiber. Firstly, one end of the pumping input optical fiber is pulled into a taper shape, then is spirally wounded on the side surface of the inner cladding of the double-cladding optical fiber and is only directly fused into a whole together with the inner cladding. In the invention, a pumping coupling system is formed without adding other optical components; and the pumping coupling system has simple structure, good reliability, small insertion loss and high coupling efficiency, thereby being suitable for high-power optical fiber lasers or optical fiber amplifiers.

Description

technical field [0001] The invention relates to the technical field of optical fiber pumping, in particular to a high-power double-clad optical fiber side pumping coupler and a manufacturing method thereof. Background technique [0002] In recent years, high-power fiber lasers and fiber amplifiers have become international research hotspots, and they have broad application prospects in laser processing, national defense and military, laser medical treatment, and telecommunication. [0003] In high-power fiber lasers and fiber amplifiers, a key technology is how to efficiently couple tens of watts or even hundreds of watts of pump laser power into the inner cladding of double-clad fibers with a diameter of only a few hundred microns. Therefore, a high-efficiency A power fiber pump coupler is used for this purpose. There are two types of pump coupling technologies currently used: end pumping and side pumping. Due to the limited area of ​​the end face pump, the efficiency of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/094
Inventor 智健陈积忠杜永建张鹏业钟汉民
Owner 广州奥鑫通讯设备有限公司
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