CN2672674Y

CN2672674Y - Ball head optical fiber

Info

Publication number: CN2672674Y
Application number: CN 200320112834
Authority: CN
Inventors: 李丽娜; 王立军; 刘君; 尹红贺
Original assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Current assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Priority date: 2003-11-25
Filing date: 2003-11-25
Publication date: 2005-01-19
Anticipated expiration: 2013-11-25

Abstract

The utility model discloses an optical fiber which is provided with a spheroid lens 2 which is connected with the optical fiber into integration on the end face of an optical fiber 1. The end face of the optical fiber 1 is cut to become a flat face by a cutting knife and is pressed in the V-shaped groove of an optical fiber fusion splicer. A part of the optical fiber is heated rapidity to melt and shrink naturally into ball shape in the course of arc discharge. The length of the discharge time is decided by the time which is needed by the curvature radius which is presented by the lens according to the surface tension. The diameter of the spheroid lens 2 is as 1. 5 times to 5 times as the diameter of the optical fiber 1. The utility model adopts the structure of the spherical lens fiber in the course of coupling, which improves the coupling efficiency of the light source and the optical fiber, makes the debugging of the optical circuit simple, and avoids the difficulty of debugging the optical circuit which is increased by the insertion of the optical lens.

Description

A kind of Ball head optical fiber

Technical field: the utility model belongs to the semiconductor laser beam shaping technique.Relate to a kind of optical fiber that is used for high-power semiconductor laser array beam shaping.

Background technology: the high-power semiconductor laser technology is one of important technology basis of Developing Defence Industry, its development will directly promote fuse, follow the tracks of, guidance, weapon simulation, igniting blasting, radar, night vision, the development of technology such as Target Recognition and antagonism also is with a wide range of applications in fields such as communication, medical science, industry.In many application, require semiconductor laser array and optical fiber or fiber bundle coupling to be integral, as the semiconductor laser pumping source of semiconductor laser scalpel, all solid state laser, be used for semiconductor laser system that materials processing handles etc.This mainly contains the practical significance of two aspects: the first is utilized the characteristic of optical fiber soft pliable song, makes laser can be passed into crawl space easily and flexibly; It two is quality that optical fiber coupling can fundamentally improve output beam, has improved power density.

Though some research institutions also exist the system architecture complexity and are difficult to problems such as practicability for obtaining high coupling efficiency and stability and simplifying practical technology and made unremitting effort both at home and abroad, are in the level of laboratory study basically.

Beam shaping and coupling for the high-power semiconductor laser array at present adopts the coupling of post lens and fiber array usually.The post lens will reach higher coupling efficiency in actual device have suitable difficulty, this is because this coupling scheme are high to the accuracy requirement of the relative position of laser instrument, post lens and optical fiber, a deviation slightly, coupling efficiency just sharply descends, and even as directly is coupled.

Beam shaping and common at present other modes that adopt of coupling for high power semiconductor lasers, laser array and folded battle array also have echelon prism and combination of lenses, steering component and combination of lenses, lens duct and combination of lenses etc.But because these several mode complex structures are difficult to form practical product.

Summary of the invention: the purpose of this utility model provides a kind of optical fiber of making simple, easily debugging, tolerance is big, coupling efficiency the is high beam shaping that is used for the high-power semiconductor laser array.

For achieving the above object, optical fiber of the present utility model is to have ball-shaped lens 2 and optical fiber to be connected in one at optical fiber 1 end face.Concrete method for making is to cut optical fiber 1 end face flat with cutter, be pressed in the V-type groove of optical fiber splicer, when arc discharge, optical fiber is local to be shrunk to sphere naturally by heat fused rapidly, and the length of discharge time makes lens present the needed time of desired radius-of-curvature according to surface tension and decides.

The diameter of ball-shaped lens 2 is 1.5 to 5 times of optical fiber 1 diameter.

The utility model adopts the structure of spheroidal lens fiber in coupling, not only improve the coupling efficiency of light source and optical fiber, and the light path debugging is simple, avoids inserting the optical lens difficulty that debugging increases to light path.

Description of drawings: accompanying drawing is the synoptic diagram of optical fiber of the present utility model, is Figure of abstract simultaneously.

Embodiment (the utility model being described specifically :) below in conjunction with accompanying drawing

It is flat that core diameter is that the silica fibre end face of 200 μ m is cut with cutter, adopts arc discharge that fiber end face is melted, and under capillary effect, fiber end face forms spheroidal lenticule, spheroidal lenslet diameter 340-380 μ m.

Claims

1, a kind of Ball head optical fiber is characterized in that having ball-shaped lens (2) and optical fiber to be connected in one at optical fiber (1) end face.

2, according to the described a kind of Ball head optical fiber of claim 1, the diameter of ball-shaped lens (2) is 1.5 to 5 times of optical fiber (1) diameter during its feature.