CN106646743A - Cladding power filter in fusion method - Google Patents

Cladding power filter in fusion method Download PDF

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Publication number
CN106646743A
CN106646743A CN201510713408.8A CN201510713408A CN106646743A CN 106646743 A CN106646743 A CN 106646743A CN 201510713408 A CN201510713408 A CN 201510713408A CN 106646743 A CN106646743 A CN 106646743A
Authority
CN
China
Prior art keywords
optical glass
glass layer
optical
optical fiber
fusion method
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510713408.8A
Other languages
Chinese (zh)
Inventor
谷亮
薛宇豪
孙伟
张红
董超
宫武鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHINA SOUTH INDUSTRIES EQUIPMENT RESEARCH INSTITUTE
Original Assignee
CHINA SOUTH INDUSTRIES EQUIPMENT RESEARCH INSTITUTE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHINA SOUTH INDUSTRIES EQUIPMENT RESEARCH INSTITUTE filed Critical CHINA SOUTH INDUSTRIES EQUIPMENT RESEARCH INSTITUTE
Priority to CN201510713408.8A priority Critical patent/CN106646743A/en
Publication of CN106646743A publication Critical patent/CN106646743A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/245—Removing protective coverings of light guides before coupling
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02295—Microstructured optical fibre
    • G02B6/02309—Structures extending perpendicularly or at a large angle to the longitudinal axis of the fibre, e.g. photonic band gap along fibre axis
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Lasers (AREA)

Abstract

The invention relates to a cladding power filter in a fusion method. A fiber from which a cladding and a coating are removed is included, an optical glass layer is connected to and solidified on the fiber, the optical glass layer is divided into N segments, N is greater than or equivalent to 2, and the refractive indexes of the N segments of the optical glass are increased successively along the light spreading direction in the fiber. The optical glass layer of different refractive indexes replaces an optical adhesive, the heat resistance temperature and thermal conduction coefficient of a material itself are improved, laser and pump light in the cladding spread in the optical glass layer, and the working temperature and safety stability of the cladding power filter are improved.

Description

A kind of fusion method covering power filtering device
Art
The present invention relates to optical-fiber laser device technical field, more particularly to a kind of fusion method covering power is filtered Device.
Background technology
With the development of optical fiber technology, optical fiber laser power increases year by year, and its main way of realization is optical fiber Laser synthesizing in laser seed system and optical-fiber laser amplification system.In order to ensure the safe steady of laser system Fixed operation and beam quality, need fibre cladding before optical fiber laser output or into before next stage system In pump light and laser filter.Existing technology and method are by single cladded-fiber or doubly clad optical fiber One section of coat and surrounding layer are removed, and optical fiber exposed part is filled with refractive index more than the optical cement for removing part Tap is touched, and when laser system operates, the pump light or laser in covering can be because the folding of optical cement part Penetrate rate change and be leaked in optical cement layer, propagate in optical cement layer.But because optical cement is for pumping The absorption of light and laser, and the optical cement coefficient of heat conduction itself is low, the luminous energy in optical cement layer is converted rapidly For heat energy so that the temperature of optical cement rises, so as to affect optical cement nature, or even damage and final Limit the effect that covering power is filtered.
The content of the invention
The invention provides a kind of can lift pump light or the filtration result of laser and melting for security and stability Melt method covering power filtering device.
A kind of fusion method covering power filtering device of the present invention, including one section of light for removing surrounding layer and coat Fibre, connects and solidifies optical glass layer on optical fiber；Optical glass layer is divided into N sections, N >=2, along optical fiber The direction of propagation of light, the refractive index of N section optical glass layers is raised successively；The refractive index of every section of optical glass layer It is all higher than the refractive index of the surrounding layer and coat for removing；Optical fiber and optical glass layer are all sealed in outside metal In shell, cooling water channel is provided with metal shell.
Preferably, the length of optical fiber is more than 5cm.
Preferably, center of the optical fiber in optical glass layer.
The present invention replaces optical cement by the optical glass layer using various refractive indexs, improves material itself Heat resisting temperature and the coefficient of heat conduction, make laser and pump light in covering propagate in optical glass layer, improve The operating temperature and security and stability of covering power filtering device.
Description of the drawings
The longitudinal profile schematic diagram of Fig. 1 present invention；
The horizontal section schematic diagram of Fig. 2 present invention.
Specific embodiment
As depicted in figs. 1 and 2, a kind of fusion method covering power filtering device of the invention, including remove outsourcing One section of optical fiber 4 of layer and coat, connects and solidifies optical glass layer 3 on optical fiber 4；Optical glass layer 3 Refractive index more than remove surrounding layer and coat refractive index；Optical fiber 4 and optical glass layer 3 are all close In being encapsulated in metal shell 2, in metal shell 2 cooling water channel is provided with.
As shown in figure 1,3 points of optical glass layer is N sections, N >=2.The direction of propagation of light along optical fiber 4, The refractive index of per section of optical glass layer 3 is n1, n2, n3... nN, index of refraction relationship is n1＜ n2＜ n3＜ ... ＜ nN.The advantage of above-mentioned design is, with being incremented by for optical glass layer refractive index, to make the pumping in covering Light and laser are progressively leached, and improve filtration result.
Remove surrounding layer and coat optical fiber 4 length more than 5cm be conducive to preferably leaching pump light and Laser.
The manufacture method of above-mentioned fusion method covering power filtering device is as follows：
Step one is straight slightly larger than optical fiber 4 in the upper sleeve through diameter of one section of optical fiber 4 for removing surrounding layer and coat The N section optical glass pipes in footpath.The direction of propagation of light along optical fiber 4, the refraction of per section of N section optical glass pipe Rate is n1, n2, n3... nN, index of refraction relationship is n1＜ n2＜ n3＜ ... ＜ nN.The length of optical fiber 5 is more than 5cm。
Step 2, using oxyhydrogen flame or graphite optical glass pipe is melted, so as to combine closely with optical fiber 4, Form optical glass layer 3.
Step 3, optical fiber 4 and optical glass layer 3 are sealed in metal shell 2.In metal shell 2 It is provided with cooling water channel.Fix and seal.
Metal shell 2 advantageously ensures that the overall integrity of device with the tight of optical glass layer 3, convenient With the integrated fixation of laser system.Meanwhile, it is in close contact, it is more beneficial for being circulated by the cooling in metal shell Take away the heat assembled in glass tubing.If there is gap with metal shell 2 in the two ends of optical glass layer 3, Can be fixed by modes such as screw or bondings.
Fusion method covering power filtering device of the present invention can be realized by said method, but and not only be limited In said method.

Claims (3)

1. a kind of fusion method covering power filtering device, including one section of optical fiber for removing surrounding layer and coat (4), it is characterised in that connect and solidify optical glass layer (3) on optical fiber (4)；Optical glass layer (3) It is divided into N sections, N >=2, the direction of propagation of light along optical fiber (4), the refraction of N section optical glass layers (3) Rate is raised successively；The refractive index of every section of optical glass layer (3) is all higher than the folding of the surrounding layer and coat for removing Penetrate rate；Optical fiber (4) and optical glass layer (3) are all sealed in metal shell (2), metal shell (2) In be provided with cooling water channel.
2. a kind of fusion method covering power filtering device according to claim 1, it is characterised in that light The length of fine (4) is more than 5cm.
3. a kind of fusion method covering power filtering device according to claim 2, it is characterised in that light The center of fine (4) in optical glass layer (3).
CN201510713408.8A 2015-10-28 2015-10-28 Cladding power filter in fusion method Pending CN106646743A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510713408.8A CN106646743A (en) 2015-10-28 2015-10-28 Cladding power filter in fusion method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510713408.8A CN106646743A (en) 2015-10-28 2015-10-28 Cladding power filter in fusion method

Publications (1)

Publication Number Publication Date
CN106646743A true CN106646743A (en) 2017-05-10

Family

ID=58829407

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510713408.8A Pending CN106646743A (en) 2015-10-28 2015-10-28 Cladding power filter in fusion method

Country Status (1)

Country Link
CN (1) CN106646743A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108121033A (en) * 2017-11-21 2018-06-05 大族激光科技产业集团股份有限公司 A kind of method for filtering out fibre cladding light, optical fiber and method for preparing optical fiber
WO2019015586A1 (en) * 2017-07-19 2019-01-24 深圳市创鑫激光股份有限公司 High-power laser optical-fiber cladding light stripper and method for manufacture

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012014173A (en) * 2010-06-30 2012-01-19 Jds Uniphase Corp Scalable cladding mode stripper device
CN103269010A (en) * 2013-05-10 2013-08-28 上海飞博激光科技有限公司 Cladding light filtering structure and manufacturing method thereof
CN104570212A (en) * 2014-12-31 2015-04-29 西南技术物理研究所 Double-cladding optical fiber cladding light stripping method
CN104865646A (en) * 2015-06-10 2015-08-26 武汉锐科光纤激光器技术有限责任公司 High-power optical collimator
CN204651670U (en) * 2015-06-12 2015-09-16 中国工程物理研究院总体工程研究所 Adopt the multikilowatt fiber cladding power stripper of microchannel water-cooled
CN104914500A (en) * 2014-03-14 2015-09-16 Ofs菲特尔有限责任公司 Device for removing needless light in high-power optical system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012014173A (en) * 2010-06-30 2012-01-19 Jds Uniphase Corp Scalable cladding mode stripper device
CN103269010A (en) * 2013-05-10 2013-08-28 上海飞博激光科技有限公司 Cladding light filtering structure and manufacturing method thereof
CN104914500A (en) * 2014-03-14 2015-09-16 Ofs菲特尔有限责任公司 Device for removing needless light in high-power optical system
CN104570212A (en) * 2014-12-31 2015-04-29 西南技术物理研究所 Double-cladding optical fiber cladding light stripping method
CN104865646A (en) * 2015-06-10 2015-08-26 武汉锐科光纤激光器技术有限责任公司 High-power optical collimator
CN204651670U (en) * 2015-06-12 2015-09-16 中国工程物理研究院总体工程研究所 Adopt the multikilowatt fiber cladding power stripper of microchannel water-cooled

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019015586A1 (en) * 2017-07-19 2019-01-24 深圳市创鑫激光股份有限公司 High-power laser optical-fiber cladding light stripper and method for manufacture
CN108121033A (en) * 2017-11-21 2018-06-05 大族激光科技产业集团股份有限公司 A kind of method for filtering out fibre cladding light, optical fiber and method for preparing optical fiber

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Application publication date: 20170510