WO2022000947A1 - High-power optical fiber coupler and manufacturing method - Google Patents

High-power optical fiber coupler and manufacturing method Download PDF

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Publication number
WO2022000947A1
WO2022000947A1 PCT/CN2020/130066 CN2020130066W WO2022000947A1 WO 2022000947 A1 WO2022000947 A1 WO 2022000947A1 CN 2020130066 W CN2020130066 W CN 2020130066W WO 2022000947 A1 WO2022000947 A1 WO 2022000947A1
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WIPO (PCT)
Prior art keywords
optical fiber
ferrule
lens
sleeve
coated optical
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PCT/CN2020/130066
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French (fr)
Chinese (zh)
Inventor
刘成成
于果蕾
邵慧慧
开北超
王颖
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山东华光光电子股份有限公司
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Publication of WO2022000947A1 publication Critical patent/WO2022000947A1/en

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    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
    • G02B6/4236—Fixing or mounting methods of the aligned elements
    • G02B6/4244—Mounting of the optical elements
    • 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
    • G02B6/26—Optical coupling means
    • G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources

Definitions

  • the invention relates to a high-power optical fiber coupler and a manufacturing method, belonging to the technical field of semiconductor lasers.
  • semiconductor lasers Due to the advantages of small size, light weight, high conversion efficiency, long life and wide wavelength coverage, semiconductor lasers are widely used in industrial, medical, communications and military fields, gradually replacing traditional gas and solid-state lasers. Fiber-coupled output semiconductor lasers are favored by people due to their flexible use and high power density. In recent years, with the development of industrial processing, medical treatment, laser printing and other fields, the demand for high-power fiber-coupled output semiconductor lasers has increased year by year.
  • the way to obtain a fiber-coupled output semiconductor laser with high power density is to use a coupling lens to focus the collimated light on the fiber end face after collimating and stacking the lasers emitted by multiple chips in the fast axis and slow axis directions.
  • the positional accuracy of the lens is required to be high, reaching the micron level.
  • most of the adjustment methods are to couple the optical fiber through the five-dimensional adjustment frame after the fast and slow axes are aligned and superimposed. After the coupling is completed, the optical fiber is fixed with glue or solder. The position tolerance during the fixing process is small. The displacement can significantly affect the coupling efficiency.
  • Chinese patent document CN 202815264 U proposes a structure in which the optical fiber and the lens are connected together through the sleeve of the intermediate limiting ring, so that they can be adjusted as a whole with a five-dimensional adjustment frame.
  • This type of structure uses glue between the optical fiber and the pin for grinding, polishing, and anti-reflection coating on the surface.
  • the coupling glue will absorb the light that cannot be transmitted, resulting in heat generation and burnout. Risk of fiber optics.
  • Chinese patent CN 203502627 U proposes an optical fiber jumper for high-power laser transmission.
  • the jumper draws on the SMA fixed ferrule to make a ferrule.
  • One end of the ferrule is fixed in the ferrule sleeve, and the other side is fixed in the ferrule sleeve.
  • One end is fixed with a collimating lens, and the end-face coated bare fiber is fixed with the ferrule through the hole in the center of the ferrule.
  • This method is conducive to transmitting light directly from the air and improving the temperature tolerance.
  • this method is in progress When the bare fiber passes through the inner hole of the ferrule, the cleanliness of the fiber end face cannot be avoided, and it cannot be cleaned, which affects the yield of the patch cord.
  • the present invention provides a high-power optical fiber coupler.
  • a high-power optical fiber coupler includes a lens, a lens sleeve, a coupling transition seat, a ferrule, and a coated optical fiber; the lens is fixedly connected to one end of the lens sleeve, and the other end of the lens sleeve is movably sleeved at one end of the coupling transition seat, and is coupled to The other end of the transition seat is sleeved with a connecting ferrule, and the middle of the ferrule is provided with a coated optical fiber;
  • the lens tube can be moved left and right.
  • the optical fiber passes through the ferrule and is fixed to the ferrule from the rear end, so that the focus of the lens is at the center of the end face of the fiber, forming a coupler fixed on the side wall of the tube shell, and the beam is coupled by adjusting the mirror.
  • the lens is a spherical lens or an aspherical lens.
  • the coated optical fiber is an optical fiber with a coating layer of 5-25 cm removed.
  • the optical fiber and the ferrule are assembled, they are exposed to the outside, which is convenient for cleaning the dust particles adhering to the optical fiber. It is cleaned by using a cotton swab dipped in a mixture of ethanol and ether.
  • the ferrule is fixed in the sleeve, and the optical fiber cannot be exposed to the sleeve and cannot be cleaned. ; If the fiber end face is dirty, when the fiber is coupled, the laser hits the end face, and the dust absorbs heat, which will cause the fiber end face to burn.
  • the optical fiber when the optical fiber is inserted into the ceramic ferrule, the powder in the ferrule will remain on the end face of the optical fiber, and the optical fiber cannot be cleaned without exposing the fixing seat. In this application, the optical fiber can be cleaned by removing the lens sleeve to avoid dust. gather.
  • the ferrule is an FC ferrule or an SMA ferrule.
  • FC ferrule or SMA ferrule are the two most commonly used ferrules in the field.
  • the SMA ferrule and the coupling transition seat are connected by bolts.
  • FC ferrule and the coupling transition seat are connected by crimping.
  • the length of the end face of the coated optical fiber extending from the ferrule located in the coupling transition seat is 1-5 cm.
  • the coupling transition seat is provided with a fixing hole.
  • the fixing holes are used to connect and fix the coupler to the housing of the device.
  • a manufacturing method of a high-power optical fiber coupler comprising the following steps:
  • optical fiber is stripped of 5-25cm coating layer, and the end face is ground, polished and coated to form a coated optical fiber;
  • the coated optical fiber is sleeved in the coupling transition seat and fixed;
  • UV glue can also be used in step (3).
  • the distance between the collimating lens and the fiber can be adjusted, so that the focus of the lens and the end face of the fiber are precisely coincident, and the parallel light is concentrated at the focus through the lens. If the fiber is not at the focus of the lens, the spot will be large and the coupling is not high. Improve accuracy.
  • Fig. 1 is the structural representation of SMA ferrule of the present invention
  • Fig. 2 is the structural representation of FC ferrule of the present invention
  • a high-power fiber coupler includes a lens 1, a lens sleeve 2, a coupling transition seat 4, a ferrule 3, and a coated optical fiber 5;
  • the lens 1 is fixedly connected to one end of the lens sleeve 2, and the lens 1 It is a ball lens, the other end of the lens sleeve 2 is movably sleeved on one end of the coupling transition seat 4, the other end of the coupling transition seat 4 is sleeved with a connecting ferrule 3, and the middle of the ferrule 3 is provided with a coated optical fiber 5; one end of the coated optical fiber 5 is deeply coupled Inside the transition seat 4, the coated optical fiber 5 and the ferrule 3 are assembled and exposed to the outside.
  • the lens sleeve 2 can be removed to facilitate cleaning of the dust particles adhering to the optical fiber, which can be cleaned by dipping a cotton swab in a mixture of ethanol and ether.
  • the ferrule is fixed in the sleeve, and the optical fiber cannot be exposed to the sleeve and cannot be cleaned. Avoid burning the fiber during use.
  • the other end is located outside the coupling transition seat 4.
  • the lens sleeve 2 can be slid back and forth to adjust so that the focus of the lens is at the center of the fiber end face.
  • the coupling transition seat is provided with a fixing hole 6, so that the coupler is fixed on the coupler housing.
  • the ferrule 3 is an SMA ferrule, which is fixed with the ferrule from the rear end.
  • the SMA ferrule is fixed with the coupling transition seat 4 by means of threads.
  • the coated optical fiber 5 is an optical fiber with a coating layer of 5 cm removed.
  • the end face of the core is
  • a high-power optical fiber coupler has the structure as described in Embodiment 1, except that the ferrule 3 is an FC ferrule, and the FC ferrule and the coupling transition seat 4 are crimped.
  • a high-power optical fiber coupler the structure of which is as described in Embodiment 1, the difference is that: the coupling transition seat 4 is provided with a fixing hole 6, and the fixing hole 6 is connected with the casing by bolts.
  • a method for manufacturing a high-power optical fiber coupler comprising the following steps:
  • optical fiber is stripped of 5-25cm coating layer, and the end face is ground, polished and coated to form a coated optical fiber;
  • the coated optical fiber is sleeved in the coupling transition seat and fixed;
  • a method for manufacturing a high-power optical fiber coupler the steps of which are the same as those in Embodiment 4, except that ultraviolet glue is used in step (3).

Abstract

A high-power optical fiber coupler and a manufacturing method. The high-power optical fiber coupler comprises a lens (1), a lens sleeve (2), a coupling transition base (4), a ferrule (3), and a coated optical fiber (5); the lens (1) is fixedly connected to one end of the lens sleeve (2); the other end of the lens sleeve (2) is movably sleeved on one end of the coupling transition base (4); the other end of the coupling transition base (4) is sleeved and connected to the ferrule (3); and the middle of the ferrule (3) is provided with the coated optical fiber (5) in a penetrating manner. The coated optical fiber (5) is exposed to the outside after being assembled with the ferrule (3), facilitating the cleaning of the coated optical fiber (5), and the distance between the lens (1) and the coated optical fiber (5) is adjustable, so that the focal point of the lens (1) is precisely coincident with an end surface of the coated optical fiber (5).

Description

一种高功率光纤耦合器及制作方法A high-power optical fiber coupler and method of making the same 技术领域technical field
本发明涉及一种高功率光纤耦合器及制作方法，属于半导体激光器的技术领域。The invention relates to a high-power optical fiber coupler and a manufacturing method, belonging to the technical field of semiconductor lasers.
背景技术Background technique
由于半导体激光器具有体积小、重量轻、转换效率高、寿命长、波长覆盖范围广等优点，广泛应用于工业、医疗、通讯和军事等领域，逐步取代了传统气体和固体激光器。光纤耦合输出半导体激光器由于使用灵活，功率密度大，受到人们的青睐，近年来，随着工业加工、医疗、激光打印等领域的发展，对高功率光纤耦合输出半导体激光器的需求逐年增加。Due to the advantages of small size, light weight, high conversion efficiency, long life and wide wavelength coverage, semiconductor lasers are widely used in industrial, medical, communications and military fields, gradually replacing traditional gas and solid-state lasers. Fiber-coupled output semiconductor lasers are favored by people due to their flexible use and high power density. In recent years, with the development of industrial processing, medical treatment, laser printing and other fields, the demand for high-power fiber-coupled output semiconductor lasers has increased year by year.
获得高功率密度的光纤耦合输出半导体激光器的方式为将多个芯片发出的激光在快轴和慢轴方向进行准直叠加后，用一个耦合透镜将准直光聚焦到光纤端面。耦合时对镜片的位置精度要求高，达到微米级。而大多数的调节方法为进行快慢轴准直叠加后，通过五维调节架加持光纤的方式来进行耦合，耦合完成后用胶水或焊锡将光纤固定，固定的过程中位置容差小，微小的移位便会明显影响耦合效率。The way to obtain a fiber-coupled output semiconductor laser with high power density is to use a coupling lens to focus the collimated light on the fiber end face after collimating and stacking the lasers emitted by multiple chips in the fast axis and slow axis directions. When coupling, the positional accuracy of the lens is required to be high, reaching the micron level. However, most of the adjustment methods are to couple the optical fiber through the five-dimensional adjustment frame after the fast and slow axes are aligned and superimposed. After the coupling is completed, the optical fiber is fixed with glue or solder. The position tolerance during the fixing process is small. The displacement can significantly affect the coupling efficiency.
中国专利文献CN 202815264 U提出了一种结构，将光纤和透镜通过中间有限位环的套筒连接在一起，使其作为一个整体用五维调节架进行调节。该类型结构采用的光纤与插针之间填充胶水，从而进行研磨、抛光、镀表面增透膜，对于百瓦级以上高功率模块的耦合胶会吸收未能传输的光，从而发热，存在烧毁光纤的风险。Chinese patent document CN 202815264 U proposes a structure in which the optical fiber and the lens are connected together through the sleeve of the intermediate limiting ring, so that they can be adjusted as a whole with a five-dimensional adjustment frame. This type of structure uses glue between the optical fiber and the pin for grinding, polishing, and anti-reflection coating on the surface. For high-power modules above 100 watts, the coupling glue will absorb the light that cannot be transmitted, resulting in heat generation and burnout. Risk of fiber optics.
中国专利CN 203502627 U提出了一种用于大功率激光传输的光纤跳线，该跳线借鉴SMA固定插芯的方式，制作了一款插芯，插芯一端固定在插芯套筒内，另一端带固定有准直透镜，端面镀膜裸光纤穿过插芯中央的孔与插芯固定在一起，该方法有利于将光直接从空气传输出去，提高了温度承受能力，但是，该方法在进行裸纤穿过插芯内孔时，无法法避免光纤端面清洁度，且无法清洁，影响了跳线的产出率。Chinese patent CN 203502627 U proposes an optical fiber jumper for high-power laser transmission. The jumper draws on the SMA fixed ferrule to make a ferrule. One end of the ferrule is fixed in the ferrule sleeve, and the other side is fixed in the ferrule sleeve. One end is fixed with a collimating lens, and the end-face coated bare fiber is fixed with the ferrule through the hole in the center of the ferrule. This method is conducive to transmitting light directly from the air and improving the temperature tolerance. However, this method is in progress When the bare fiber passes through the inner hole of the ferrule, the cleanliness of the fiber end face cannot be avoided, and it cannot be cleaned, which affects the yield of the patch cord.
发明内容SUMMARY OF THE INVENTION
为解决上述问题，本发明提供了一种高功率光纤耦合器。In order to solve the above problems, the present invention provides a high-power optical fiber coupler.
同时提供了一种高功率光纤耦合器的制作方法。At the same time, a manufacturing method of a high-power optical fiber coupler is provided.
一种高功率光纤耦合器，包括透镜、透镜套筒、耦合过渡座、插芯、镀膜光纤；所述透镜固定连接透镜套筒一端，透镜套筒另一端活动套设于耦合过渡座一端，耦合过渡座另一端套设连接插芯，插芯中部贯穿设置有镀膜光纤；A high-power optical fiber coupler includes a lens, a lens sleeve, a coupling transition seat, a ferrule, and a coated optical fiber; the lens is fixedly connected to one end of the lens sleeve, and the other end of the lens sleeve is movably sleeved at one end of the coupling transition seat, and is coupled to The other end of the transition seat is sleeved with a connecting ferrule, and the middle of the ferrule is provided with a coated optical fiber;
透镜套筒可以左右活动调节。光纤传过插芯，从后端与插芯固定，使透镜焦点在光纤端面中心处，形成耦合器固定在管壳侧壁上，通过调节反射镜的方式进行光束耦合。The lens tube can be moved left and right. The optical fiber passes through the ferrule and is fixed to the ferrule from the rear end, so that the focus of the lens is at the center of the end face of the fiber, forming a coupler fixed on the side wall of the tube shell, and the beam is coupled by adjusting the mirror.
根据本发明，优选的，所述透镜为球透镜或非球面透镜。According to the present invention, preferably, the lens is a spherical lens or an aspherical lens.
根据本发明，优选的，镀膜光纤为剥除5-25cm涂覆层的光纤。According to the present invention, preferably, the coated optical fiber is an optical fiber with a coating layer of 5-25 cm removed.
光纤与插芯组装后裸露在外部，方便清洁穿光纤时粘附的灰尘颗粒，通过用棉签蘸乙醇、乙醚混合液清洁，对比文件中插芯固定在套筒中，光纤无法露出套筒无法清洁；光纤端面如果有脏污，进行光纤耦合时，激光打在端面上，灰尘吸热会造成光纤端面烧毁。对比文件中光纤穿入陶瓷插芯时插芯内的粉末会留在光纤端面，而光纤不露出固定座无法清洁，本申请中可以通过取下透镜套筒的方式，对光纤进行清洁，避免灰尘聚集。After the optical fiber and the ferrule are assembled, they are exposed to the outside, which is convenient for cleaning the dust particles adhering to the optical fiber. It is cleaned by using a cotton swab dipped in a mixture of ethanol and ether. In the comparison document, the ferrule is fixed in the sleeve, and the optical fiber cannot be exposed to the sleeve and cannot be cleaned. ; If the fiber end face is dirty, when the fiber is coupled, the laser hits the end face, and the dust absorbs heat, which will cause the fiber end face to burn. In the comparison document, when the optical fiber is inserted into the ceramic ferrule, the powder in the ferrule will remain on the end face of the optical fiber, and the optical fiber cannot be cleaned without exposing the fixing seat. In this application, the optical fiber can be cleaned by removing the lens sleeve to avoid dust. gather.
根据本发明，优选的，所述的插芯为FC插芯或SMA插芯。FC插芯或SMA插芯为本领域最为常用的两种插芯。According to the present invention, preferably, the ferrule is an FC ferrule or an SMA ferrule. FC ferrule or SMA ferrule are the two most commonly used ferrules in the field.
根据本发明，进一步优选的，SMA插芯与耦合过渡座之间通过螺栓连接。According to the present invention, it is further preferred that the SMA ferrule and the coupling transition seat are connected by bolts.
根据本发明，进一步优选的，FC插芯与耦合过渡座之间压接连接。According to the present invention, it is further preferred that the FC ferrule and the coupling transition seat are connected by crimping.
根据本发明，优选的，镀膜光纤延伸出插芯位于耦合过渡座内的端面长度为1-5cm。According to the present invention, preferably, the length of the end face of the coated optical fiber extending from the ferrule located in the coupling transition seat is 1-5 cm.
根据本发明，优选的，所述耦合过渡座上设置有固定孔。固定孔用于将耦合器与装置的外壳进行连接固定。According to the present invention, preferably, the coupling transition seat is provided with a fixing hole. The fixing holes are used to connect and fix the coupler to the housing of the device.
一种高功率光纤耦合器的制作方法，包括如下步骤：A manufacturing method of a high-power optical fiber coupler, comprising the following steps:
(1)将准直透镜用紫外胶与透镜套筒一端粘合在一起；(1) Glue the collimating lens to one end of the lens sleeve with UV glue;
(2)光纤剥除5-25cm涂覆层，进行端面研磨、抛光、镀膜，形成镀膜光纤；(2) The optical fiber is stripped of 5-25cm coating layer, and the end face is ground, polished and coated to form a coated optical fiber;
(3)将镀膜光纤穿入插芯中露出插芯端面1-5cm，在另一端用折射率和光纤匹配的高温胶水将镀膜光纤与插芯固定，采用端检仪检查光纤端面，并进行清洁；(3) Insert the coated optical fiber into the ferrule to expose 1-5cm of the end face of the ferrule, fix the coated optical fiber and the ferrule at the other end with high-temperature glue that matches the refractive index and the optical fiber, and use an end detector to check the fiber end face and clean it ;
(4)将镀膜光纤通过套设于耦合过渡座内并固定；(4) The coated optical fiber is sleeved in the coupling transition seat and fixed;
(5)将装配好准直透镜的透镜套筒套在耦合过渡座另一端，使准直透镜与镀膜光纤同轴，通过移动套筒位置将准直透镜焦点落在光纤端面上；(5) Sleeve the lens sleeve assembled with the collimating lens on the other end of the coupling transition seat, so that the collimating lens is coaxial with the coated optical fiber, and the focus of the collimating lens falls on the end face of the optical fiber by moving the position of the sleeve;
(6)通过螺栓将装配好的耦合器固定在耦合器外壳上。(6) Fix the assembled coupler on the coupler housing by bolts.
根据本发明，优选的，步骤(3)中也可以使用紫外胶水。According to the present invention, preferably, UV glue can also be used in step (3).
本发明的有益效果在于：The beneficial effects of the present invention are:
1、准直透镜和光纤距离可调，从而使透镜焦点与光纤端面精确重合，平行光经过透镜汇聚在焦点处，若光纤不在透镜焦点处光斑会大，耦合不高，现在可以通过调节距离，提高精度。1. The distance between the collimating lens and the fiber can be adjusted, so that the focus of the lens and the end face of the fiber are precisely coincident, and the parallel light is concentrated at the focus through the lens. If the fiber is not at the focus of the lens, the spot will be large and the coupling is not high. Improve accuracy.
2、通过将镀膜光纤与插芯固定，其导热性能好，可以有效控制温度升高。2. By fixing the coated optical fiber and the ferrule, its thermal conductivity is good, and the temperature increase can be effectively controlled.
附图说明Description of drawings
图1是本发明SMA插芯结构示意图；Fig. 1 is the structural representation of SMA ferrule of the present invention;
图2是本发明FC插芯结构示意图；Fig. 2 is the structural representation of FC ferrule of the present invention;
其中、1、透镜；2、透镜套筒；3、插芯；4、耦合过渡座；5、镀膜光纤；6固定孔。Among them, 1. Lens; 2. Lens sleeve; 3. Ferrule; 4. Coupling transition seat; 5. Coated optical fiber; 6. Fixing hole.
具体实施方式detailed description
下面通过实施例并结合附图对本发明做进一步说明，但不限于此。The present invention will be further described below with reference to the embodiments and the accompanying drawings, but is not limited thereto.
实施例1：Example 1:
如图1所示，一种高功率光纤耦合器，包括透镜1、透镜套筒2、耦合过渡座4、插芯3、镀膜光纤5；所述透镜1固定连接透镜套筒2一端，透镜1为球透镜，透镜套筒2另一端活动套设于耦合过渡座4一端，耦合过渡座4另一端套设连接插芯3，插芯3中部贯穿设置有镀膜光纤5；镀膜光纤5一端深入耦合过渡座4内部，镀膜光纤5与插芯3组装后裸露在外部，可以取下透镜套筒2，方便清洁穿光纤时粘附的灰尘颗粒，通过用棉签蘸乙醇、乙醚混合液清洁，对比文件中插芯固定在套筒中，光纤无法露出套筒无法清洁。避免了使用时烧毁光纤。另一端位于耦合过渡座4外部，透镜套筒2可以前后滑动调节，使透镜焦点在光纤端面中心处，所述耦合过渡座上设置有固定孔6，使得耦合器固定在耦合器外壳上。插芯3为SMA插芯，从后端与插芯固定，SMA插芯采用螺纹的方式与耦合过渡座4固定在一起，镀膜光纤5为剥除涂覆层5cm的光纤，镀膜光纤延伸出插芯端面2cm。As shown in Figure 1, a high-power fiber coupler includes a lens 1, a lens sleeve 2, a coupling transition seat 4, a ferrule 3, and a coated optical fiber 5; the lens 1 is fixedly connected to one end of the lens sleeve 2, and the lens 1 It is a ball lens, the other end of the lens sleeve 2 is movably sleeved on one end of the coupling transition seat 4, the other end of the coupling transition seat 4 is sleeved with a connecting ferrule 3, and the middle of the ferrule 3 is provided with a coated optical fiber 5; one end of the coated optical fiber 5 is deeply coupled Inside the transition seat 4, the coated optical fiber 5 and the ferrule 3 are assembled and exposed to the outside. The lens sleeve 2 can be removed to facilitate cleaning of the dust particles adhering to the optical fiber, which can be cleaned by dipping a cotton swab in a mixture of ethanol and ether. The ferrule is fixed in the sleeve, and the optical fiber cannot be exposed to the sleeve and cannot be cleaned. Avoid burning the fiber during use. The other end is located outside the coupling transition seat 4. The lens sleeve 2 can be slid back and forth to adjust so that the focus of the lens is at the center of the fiber end face. The coupling transition seat is provided with a fixing hole 6, so that the coupler is fixed on the coupler housing. The ferrule 3 is an SMA ferrule, which is fixed with the ferrule from the rear end. The SMA ferrule is fixed with the coupling transition seat 4 by means of threads. The coated optical fiber 5 is an optical fiber with a coating layer of 5 cm removed. The end face of the core is 2cm.
与现有结构相比，本申请的各项数据均有所改善，具体对比数据如下：Compared with the existing structure, all the data of this application have been improved, and the specific comparison data are as follows:
Figure PCTCN2020130066-appb-000001
Figure PCTCN2020130066-appb-000001
通过上述表格可知，本申请的结构光纤温度明显降低，产量和产品合格率均有所提高，It can be seen from the above table that the temperature of the structural optical fiber of the present application is significantly reduced, and the output and product qualification rate are improved.
实施例2：Example 2:
如图2所示，一种高功率光纤耦合器，其结构如实施例1所述，不同之处在于：插芯3为FC插芯，FC插芯与耦合过渡座4之间通过压接。As shown in FIG. 2 , a high-power optical fiber coupler has the structure as described in Embodiment 1, except that the ferrule 3 is an FC ferrule, and the FC ferrule and the coupling transition seat 4 are crimped.
实施例3：Example 3:
一种高功率光纤耦合器，其结构如实施例1所述，不同之处在于：所述耦合过渡座4上设置有固定孔6，固定孔6通过螺栓与外壳进行连接。A high-power optical fiber coupler, the structure of which is as described in Embodiment 1, the difference is that: the coupling transition seat 4 is provided with a fixing hole 6, and the fixing hole 6 is connected with the casing by bolts.
实施例4：Example 4:
一种高功率光纤耦合器的制作方法，其结构如实施例1所示，包括如下步骤：A method for manufacturing a high-power optical fiber coupler, the structure of which is shown in Embodiment 1, comprising the following steps:
(1)将准直透镜用紫外胶与透镜套筒一端粘合在一起；(1) Glue the collimating lens to one end of the lens sleeve with UV glue;
(2)光纤剥除5-25cm涂覆层，进行端面研磨、抛光、镀膜，形成镀膜光纤；(2) The optical fiber is stripped of 5-25cm coating layer, and the end face is ground, polished and coated to form a coated optical fiber;
(3)将镀膜光纤穿入插芯中露出插芯端面1-5cm，在另一端用折射率和光纤匹配的高温胶水将镀膜光纤与插芯固定，采用端检仪检查光纤端面，并进行清洁；(3) Insert the coated optical fiber into the ferrule to expose 1-5cm of the end face of the ferrule, fix the coated optical fiber and the ferrule at the other end with high-temperature glue that matches the refractive index and the optical fiber, and use an end detector to check the fiber end face and clean it ;
(4)将镀膜光纤通过套设于耦合过渡座内并固定；(4) The coated optical fiber is sleeved in the coupling transition seat and fixed;
(5)将装配好准直透镜的透镜套筒套在耦合过渡座另一端，使准直透镜与镀膜光纤同轴，通过移动套筒位置将准直透镜焦点落在光纤端面上；(5) Sleeve the lens sleeve assembled with the collimating lens on the other end of the coupling transition seat, so that the collimating lens is coaxial with the coated optical fiber, and the focus of the collimating lens falls on the end face of the optical fiber by moving the position of the sleeve;
(6)通过螺栓将装配好的耦合器固定在耦合器外壳上。(6) Fix the assembled coupler on the coupler housing by bolts.
实施例5：Example 5:
一种高功率光纤耦合器的制作方法，其步骤如实施例4一致，不同的是，步骤(3)中使用紫外胶水。A method for manufacturing a high-power optical fiber coupler, the steps of which are the same as those in Embodiment 4, except that ultraviolet glue is used in step (3).
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

  1. 一种高功率光纤耦合器，其特征在于：包括透镜、透镜套筒、耦合过渡座、插芯、镀膜光纤；所述透镜固定连接透镜套筒一端，透镜套筒另一端活动套设于耦合过渡座一端，耦合过渡座另一端连接套设连接插芯，插芯中部贯穿设置有镀膜光纤。A high-power optical fiber coupler is characterized by comprising a lens, a lens sleeve, a coupling transition seat, a ferrule, and a coated optical fiber; the lens is fixedly connected to one end of the lens sleeve, and the other end of the lens sleeve is movably sleeved on the coupling transition One end of the seat and the other end of the coupling transition seat are connected and sleeved with a connection ferrule, and a coated optical fiber is arranged through the middle of the ferrule.
  2. 根据权利要求1所述的高功率光纤耦合器，其特征在于：所述透镜为球透镜或非球面透镜。The high-power optical fiber coupler according to claim 1, wherein the lens is a spherical lens or an aspherical lens.
  3. 根据权利要求1所述的高功率光纤耦合器，其特征在于：镀膜光纤为剥除5-25cm涂覆层的光纤。The high-power optical fiber coupler according to claim 1, wherein the coated optical fiber is an optical fiber with a coating layer of 5-25 cm removed.
  4. 根据权利要求1所述的高功率光纤耦合器，其特征在于：所述的插芯为FC插芯或SMA插芯。The high-power optical fiber coupler according to claim 1, wherein the ferrule is an FC ferrule or an SMA ferrule.
  5. 根据权利要求4所述的高功率光纤耦合器，其特征在于：SMA插芯与耦合过渡座之间通过螺栓连接。The high-power optical fiber coupler according to claim 4, wherein the SMA ferrule and the coupling transition seat are connected by bolts.
  6. 根据权利要求4所述的高功率光纤耦合器，其特征在于：FC插芯与耦合过渡座之间压接连接。The high-power optical fiber coupler according to claim 4, wherein the FC ferrule and the coupling transition seat are connected by crimping.
  7. 根据权利要求1所述的高功率光纤耦合器，其特征在于：镀膜光纤延伸出插芯位于耦合过渡座内的端面长度为1-5cm。The high-power optical fiber coupler according to claim 1, wherein the length of the end face of the coated optical fiber extending out of the ferrule and located in the coupling transition seat is 1-5 cm.
  8. 根据权利要求1所述的高功率光纤耦合器，其特征在于：所述耦合过渡座上设置有固定孔。The high-power optical fiber coupler according to claim 1, wherein the coupling transition seat is provided with a fixing hole.
  9. 一种高功率光纤耦合器的制作方法，其结构如权利要求1，包括如下步骤：A method for making a high-power optical fiber coupler, the structure of which is as claimed in claim 1, comprising the steps of:
    (1)将准直透镜用紫外胶与透镜套筒一端粘合在一起；(1) Glue the collimating lens to one end of the lens sleeve with UV glue;
    (2)光纤剥除5-25cm涂覆层，进行端面研磨、抛光、镀膜，形成镀膜光纤；(2) The optical fiber is stripped of 5-25cm coating layer, and the end face is ground, polished and coated to form a coated optical fiber;
    (3)将镀膜光纤穿入插芯中露出插芯端面1-5cm，在另一端用折射率和光纤匹配的高温胶水将镀膜光纤与插芯固定，采用端检仪检查光纤端面，并进行清洁；(3) Insert the coated optical fiber into the ferrule to expose 1-5cm of the end face of the ferrule, fix the coated optical fiber and the ferrule at the other end with high-temperature glue that matches the refractive index and the optical fiber, and use an end detector to check the fiber end face and clean it ;
    (4)将镀膜光纤通过套设于耦合过渡座内并固定；(4) The coated optical fiber is sleeved in the coupling transition seat and fixed;
    (5)将装配好准直透镜的透镜套筒套在耦合过渡座另一端，使准直透镜与镀膜光纤同轴，通过移动套筒位置将准直透镜焦点落在光纤端面上；(5) Sleeve the lens sleeve assembled with the collimating lens on the other end of the coupling transition seat, so that the collimating lens is coaxial with the coated optical fiber, and the focus of the collimating lens falls on the end face of the optical fiber by moving the position of the sleeve;
    (6)通过螺栓将装配好的耦合器固定在耦合器外壳上。(6) Fix the assembled coupler on the coupler housing by bolts.
  10. 根据权利要求9所述的高功率光纤耦合器的制作方法，其特征在于：步骤(3)中也可以使用紫外胶水。The method for manufacturing a high-power optical fiber coupler according to claim 9, wherein UV glue can also be used in step (3).
PCT/CN2020/130066 2020-06-30 2020-11-19 High-power optical fiber coupler and manufacturing method WO2022000947A1 (en)

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