CN209081736U

CN209081736U - Square core fibre

Info

Publication number: CN209081736U
Application number: CN201821576268.XU
Authority: CN
Inventors: 廉正刚; 王力东; 徐江河; 谢利华; 丁凡; 张君; 夏祖明; 姚郑斌; 皮亚斌
Original assignee: WUHAN YANGTZE OPTICAL ELECTRONIC CO Ltd
Current assignee: Wuhan changyingtong Optoelectronic Technology Co., Ltd
Priority date: 2018-09-26
Filing date: 2018-09-26
Publication date: 2019-07-09
Anticipated expiration: 2028-09-26

Abstract

The utility model devises a kind of square core fibre, the fibre core of optical fiber be not it is round, be in square or rectangular or other polygonized structures.Fiber core is using pure quartz or GeO₂Dopant material.The fibre core of the optical fiber is polygon fibre core, and covering is lower than the fluorine doped bushing pipe of core material using refractive index, realizes prefabricated rods preparation by the way that plug is inserted in fluorine doped bushing pipe, the refractive index of fibre core is 1.4570-1.4750.The size of prefabricated rods is usually tens mm dias, after drawing optic fibre, the section of optical fiber be it is round, fibre core is polygonized structure.Party's core locator fibre can expand semiconductor laser power, and with higher efficiency, more inexpensive, structure is simple, can be directly used for the advantage at Flexible Manufacture scene, greatly improve semiconductor laser application.

Description

Square core fibre

Technical field

The utility model belongs to optical fiber preparation technical field more particularly to a kind of square core fibre.

Background technique

Under the promotion of laser processing application, high power semiconductor lasers are rapidly developed, output beam function Rate is big, brightness is high, becomes countries in the world focus of attention.Semiconductor laser is compared with other types of laser, advantage ten Divide protrusion, can be directly used in the laser manufacturing field such as laser welding, cladding and surface treatment.Semiconductor laser optical fiber energy Core devices one of of the tread assembly as high-power and high-luminance semiconductor laser are closed, the defeated of semiconductor laser can be efficiently promoted Power out, with high efficiency, low cost, the simple advantage of structure, is to work as compared with other semiconductor lasers close beam system Preceding semiconductor laser closes one of newest hot spot in beam research field.

The fibre core of square shaped core energy-transmission optic fibre be in square or rectangular and the pattern match of semiconductor laser output end compared with It is good, coupling efficiency can be improved, can be widely applied in semiconductor laser optical-fiber bundling device assembly, it can be by N number of semiconductor Laser module, which exports, swashs combiner output, and the laser beam quality after semiconductor laser conjunction beam reaches to be kept to the maximum extent, Bundling device component brightness ratio is close to 1.By the independent research and technical study of square shaped output optical fibre, push a new generation can be efficient The development of rate semiconductor laser bundling device part.Currently, high-power fiber closes tread assembly mainly by Canadian ITF Lab Inc. both at home and abroad Monopolization, the laboratory are that the optical-fiber bundling device type of production is more, and performance is high and stablizes, most of high power optical fibre laser factory Optical-fiber bundling component used in quotient and laboratory is purchased from its company.Between 2004 to 2009, Canadian ITF Lab Inc.'s report The road Experiment Result of a series of kinds of high brightness power beam combiners.Its end coupling structure is differed from 4 × 1 to 19 × 1 type, coupling The coupling efficiency of device reaches as high as 93%.Meanwhile the U.S. laboratory OFS is that strength is relied on Lucent AT&T Labs, also in height Power passive optical fiber component field remains technological precedence advantage.2016, which reported a kind of 7 × 1 type end side couplings The high brightness power beam combiner of structure is closed, the brightness ratio of coupler is 1.1.The efficiency of transmission of such commercialized bundling device is about The laboratory 90%, OFS, which reports its similar bundling device, can realize pump transmission efficiency up to 99%.Domestic Zhuhai Guang Ku, Shenzhen Bright light science and technology, Tsinghua University, National University of Defense technology etc. are outstanding in high power low-light level optical fiber conjunction tread assembly field performance.And for High-brightness fiber-optic closes the development of tread assembly, and domestic relevant report is rare, and relevant homemade goods are almost without appearance.

Using semiconductor laser as the laser technology of core, scientific research, industrial manufacture, national defense construction, biologic medical, The fields such as information industry, resource environment and entertainment have been widely used.In the big of Chinese manufacturing transition and upgrade The advantages such as under environment, the high-efficient of semiconductor laser, energy consumption are small, the service life is long, cost performance height more highlight.Current research table Bright, semiconductor laser is not only the pumping source as complicated and high-cost optical fiber laser and disc laser, very Multi-field semiconductor laser becomes a new science and technology and removes substitution traditional technology, directly applies to laser medicine, material processing is such as The fields such as cladding, welding.If semiconductor laser can further be expanded in brightness and power, this will also greatly increase half The application category of conductor laser.

Optical fiber energy bundling device component has as a kind of novel conjunction tread assembly for being used to expand semiconductor laser power High efficiency, low cost, structure are simple, can be directly used for the advantage at Flexible Manufacture scene, greatly improve semiconductor laser and answer With.

Utility model content

Technical problem to be solved by the utility model is to provide a kind of square core fibres, can expand semiconductor laser Power, with higher efficiency, more inexpensive, structure is simple, can be directly used for the advantage at Flexible Manufacture scene, greatly improves half Conductor laser application.

The technical scheme adopted by the utility model to solve the technical problem is as follows: providing a kind of square core fibre, include Fibre core and covering, the fibre core of the optical fiber are polygon fibre core (square or rectangles or other polygons), and covering uses refractive index Lower than the fluorine doped bushing pipe of core material, prefabricated rods preparation is realized by the way that plug is inserted in fluorine doped bushing pipe, fibre core is quartz substrate, is mixed Miscellaneous germanium dioxide, the refractive index of fibre core are 1.4570-1.4750.

According to the above technical scheme, the numerical aperture of optical fiber is between 0.10-0.25.Using high molecular material optical fiber coating Layer.The refractive index that a certain proportion of germanium dioxide adjusts fibre core is adulterated by chemical vapour deposition technique.

According to the above technical scheme, the refractive index of fluorine doped covering is 1.4360-1.4534.

According to the above technical scheme, the naked fibre outer diameter core size of optical fiber is 20 μm -1000 μm.

The beneficial effect that the utility model generates is: the utility model square core fibre can expand semiconductor laser function Rate, with higher efficiency, more inexpensive, structure is simple, can be directly used for the advantage at Flexible Manufacture scene, greatly improves and partly leads Body laser application.

Detailed description of the invention

Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:

Fig. 1 is square core large core fiber schematic cross-section in the utility model embodiment；

Fig. 2 is rectangular core large core fiber schematic cross-section in the utility model embodiment；

Fig. 3 is hexagon core large core fiber schematic cross-section in the utility model embodiment.

Specific embodiment

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this Utility model is not used to limit the utility model.

In the utility model embodiment one, a kind of square fibre optical fiber is provided, as shown in Figure 1-3, the fibre core of the optical fiber is more Side shape fibre core, covering are lower than the fluorine doped bushing pipe of core material using refractive index, prefabricated by the way that plug is inserted in the realization of fluorine doped bushing pipe Stick preparation, fibre core is quartz substrate, adulterates germanium dioxide, the refractive index of fibre core is 1.4570-1.4750, the numerical aperture of optical fiber Between 0.10-0.25, the refractive index of fluorine doped covering is 1.4360-1.4534, and naked fibre outer diameter core size is 20 μm of -1000 μ m.The fibre core of optical fiber has multiple sides, and in the structure of polygon (square, rectangle or other polygons), the vertex of square shaped core is in Arc.Fiber core is rectangular quartz substrate material, and the glass bushing technique of a slightly lower refractive index is inserted in by rectangular plug, Realize the preparation of integral prefabricated stick.The process of prefabricated rods preparation carries out high temperature evacuation process between plug and covering bushing pipe, Eliminate the air part of fibre core and covering in prefabricated rods.Prefabricated rods outer rim after collapsing is a class square structure, and size compares Greatly, outer rim is polished into circle on lathe, after drawing optic fibre, global sections are a circles, and fibre core keeps polygonized structure.

It should be understood that for those of ordinary skills, it can be modified or changed according to the above description, And all these modifications and variations all should belong to the protection scope of the appended claims for the utility model.

Claims

1. a kind of square core fibre, includes fibre core and covering, which is characterized in that the fibre core of the optical fiber is polygon fibre core, packet Layer is lower than the fluorine doped bushing pipe of core material using refractive index, realizes prefabricated rods preparation, fibre core by the way that plug is inserted in fluorine doped bushing pipe For quartz substrate, germanium dioxide is adulterated, the refractive index of fibre core is 1.4570-1.4750.

2. square core fibre according to claim 1, which is characterized in that the numerical aperture of optical fiber is between 0.10-0.25.

3. square core fibre according to claim 1 or 2, which is characterized in that the refractive index of fluorine doped covering is 1.4360- 1.4534。

4. square core fibre according to claim 1 or 2, which is characterized in that the naked fibre outer diameter core size of optical fiber is 20 μ m-1000μm。