Fiber splicing apparatus and method using a carbon dioxide laser as a heat source

Abstract

The application discloses a kind of carbon dioxide laser as heat source's optical fiber bonding equipment and method, equipment includes operating platform, carbon dioxide laser, optical path mechanism, five-dimensional translation stage and micro magnification system;The top of operating platform is installed with the vacuum chamber that can be opened and closed, vacuum chamber is communicated with vacuumizing equipment, and observation window and laser window are installed on vacuum chamber;Carbon dioxide laser is installed at the bottom of operating platform;Optical path mechanism includes the steering mirror group that is installed in operating platform top surface in sequence, four corner light cone and annular parabolic mirror;Four corner light cone is installed with dispersed mirror piece group around;Five-dimensional translation stage is installed on operating platform;First clamp and second clamp are installed on five-dimensional translation stage;Micro magnification system is installed on operating platform, and it is towards five-dimensional translation stage, and micro magnification system is arranged opposite observation window.This application can realize the bonding connection of optical fiber and end cap or other optical devices under low temperature condition, effectively improve the success rate of bonding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-power lasers, in particular to a fiber splicing device and method with a carbon dioxide laser as a heat source. BACKGROUND

[0002] Traditional optical fiber splicing is divided into two types of live joints and dead joints. The live joint is a method of active connection, which requires the use of an optical fiber connector to realize the butt joint of the optical fiber and the pigtail. It is generally a cold connection method. The dead joint is a fixed connection, which realizes the butt joint of the optical fiber through an optical fiber fusion splicer. The optical fiber is connected after being melted by high temperature. It is generally a hot connection method. In order to avoid the change of the corresponding position of the optical fiber and the crystal, and to ensure that the optical fiber connection can withstand high energy density, the connection of the optical fiber in the laser assembly is mostly dead joint, so only the fixed connection method is considered. In the case of positioning and connecting the quartz optical fiber and the end cap or other optical devices, and the fusion end face is coated with a film or other optical structure, the traditional fusion method is difficult to achieve because the sizes of the two end faces are different and the film or optical structure is easily affected by high temperature. Therefore, a new connection method still needs to be explored.

[0003] The traditional optical fiber hot connection method using an optical fiber fusion splicer is generally divided into an electric arc optical fiber fusion splicer and a laser optical fiber fusion splicer according to the different heat sources. Although the electric arc optical fiber fusion splicer is cheap, the electric arc stability is poor and difficult to control accurately, which can cause a large heat affected zone and affect the surrounding materials, and can produce high fusion loss. The laser optical fiber fusion splicer has concentrated laser light source, small heat affected zone, and is more stable and easy to control, which avoids the damage of the optical fiber caused by overheating.

[0004] Low-temperature bonding technology is widely used in the connection of crystals. Compared with high-temperature direct bonding, the connection of crystals can be completed at a lower temperature. The wet activation process has low cost, simple process, ideal connection strength and effect. The hydrophilic bonding in the wet activation bonding can achieve a certain bonding force at low temperature, and the bonding interface is uniform, accurate and transparent. It is widely used in the bonding of two bodies made of materials such as quartz and optical glass. At present, the existing fusion device can damage the material properties of the optical device, cause large thermal deformation during the fusion process, and damage the optical material due to uneven heating. Moreover, it cannot provide the environment required for low-temperature bonding of the optical fiber and the end cap or other optical devices.

[0005] Therefore, a fiber splicing device and method with a carbon dioxide laser as a heat source are provided. SUMMARY

[0006] The purpose of the present application is to provide a fiber splicing device and method with a carbon dioxide laser as a heat source, which aims to solve or improve at least one of the above technical problems.

[0007] To achieve the above object, the present application provides the following scheme: the present application provides a kind of optical fiber bonding equipment with carbon dioxide laser as heat source, comprising:

[0008] Operation platform, the top of the operation platform is equipped with openable vacuum chamber, the vacuum chamber is communicated with vacuumizing equipment, and the vacuum chamber is equipped with observation window and laser window;

[0009] Carbon dioxide laser, the carbon dioxide laser is installed at the bottom of the operation platform;

[0010] Light path mechanism, the light path mechanism includes the turning mirror group, the four-cornered light cone and the annular parabolic mirror successively installed on the top surface of the operation platform;The four-cornered light cone is equipped with dispersed mirror piece group around;

[0011] Five-dimensional translation stage, the five-dimensional translation stage is installed on the operation platform, and is located between the four-cornered light cone and the annular parabolic mirror;The first clamp and the second clamp are installed on the five-dimensional translation stage, the first clamp is used to fix the optical device to be bonded, and the second clamp is used to fix the jacketed optical fiber to be bonded;

[0012] Microscopic magnification system, the microscopic magnification system is installed on the operation platform, and is towards the five-dimensional translation stage, and the microscopic magnification system is arranged opposite to the observation window;

[0013] Wherein, the four-cornered light cone, the annular parabolic mirror, the dispersed mirror piece group, the microscopic magnification system and the five-dimensional translation stage are located in the vacuum chamber;The turning mirror group is used to reflect the emitted laser beam of the carbon dioxide laser to the four-cornered light cone through the laser window, and the dispersed mirror piece group is used to reflect four single-beam lasers dispersed from the four-cornered light cone on the annular parabolic mirror;The reflection direction of the single-beam laser is parallelly arranged with the main axis direction of the annular parabolic mirror.

[0014] According to the optical fiber bonding equipment with carbon dioxide laser as heat source provided by the present application, the operation platform is provided with a light-through hole, the turning mirror group includes a support installed on the operation platform, and the support is installed with a first mirror and a second mirror;The first mirror is located below the operation platform, and the second mirror is located above the operation platform;The first mirror and the second mirror are both 45° mirrors;

[0015] The landing point of the emitted laser beam of the carbon dioxide laser is located at the center of the first mirror and the center of the second mirror, and the front end of the four-cornered light cone is located on the reflection laser central axis of the second mirror.

[0016] The application provides a fiber splicing device with a carbon dioxide laser as a heat source, wherein the dispersing mirror set comprises a third mirror, a fourth mirror, a fifth mirror and a sixth mirror, the third mirror and the fourth mirror are located above and below the four-edge light cone respectively, and the fifth mirror and the sixth mirror are located on the two sides of the four-edge light cone; the third mirror, the fourth mirror, the fifth mirror and the sixth mirror are all 45° mirrors.

[0017] The application provides a fiber splicing device with a carbon dioxide laser as a heat source, wherein a water cooling device is externally mounted on the carbon dioxide laser.

[0018] The microscopic amplification system comprises a vertical camera imaging calibration device and a horizontal camera imaging calibration device, the horizontal camera imaging calibration device is installed on one side of the five-dimensional translation table, and the vertical camera imaging calibration device is installed above the five-dimensional translation table.

[0019] The application provides a fiber splicing device with a carbon dioxide laser as a heat source, wherein the laser window is located on the light inlet side of the vacuum chamber, and the observation window comprises a vertical strip-shaped observation window and a circular observation window, and the vertical strip-shaped observation window and the circular observation window are both installed on the vacuum chamber.

[0020] The application provides a fiber splicing device with a carbon dioxide laser as a heat source, wherein the mirror surfaces of the first mirror, the second mirror, the third mirror, the fourth mirror, the fifth mirror and the sixth mirror, the four-edge light cone and the annular parabolic mirror are all made of aluminum or coated with a reflective film.

[0021] The application provides a fiber splicing device with a carbon dioxide laser as a heat source, wherein the vacuumizing device adopts a molecular pump, the molecular pump is communicated with the inner cavity of the vacuum chamber through a vacuum pipeline, and an air exhaust valve is installed on the vacuum pipeline.

[0022] The application further provides a fiber splicing method with a carbon dioxide laser as a heat source, which comprises the following steps:

[0023] Step one, polishing, cleaning and activating the splicing part of the jacketed optical fiber to be spliced and the splicing part of the jacketed optical fiber to be spliced respectively;

[0024] Step two, fixing the optical device to be spliced on a first clamp and fixing the jacketed optical fiber to be spliced on a second clamp;

[0025] Step three, observing the position of the optical device and the cladding fiber by a microscopic magnification system, adjusting the five-dimensional translation table so that the bonding part of the optical device and the cladding fiber is attached and is in the focal point of the ring parabolic mirror;

[0026] Step four, vacuumizing the vacuum chamber by a vacuumizing device;

[0027] Step five, turning on the carbon dioxide laser, the emitted laser beam emitted by the carbon dioxide laser is emitted to the four-pronged light cone through the turning mirror group, so that the emitted laser beam is evenly divided into four single beams, the four single beams are reflected to the ring parabolic mirror through the dispersing mirror group, and the ring parabolic mirror converges the four laser beams to the focal point to provide heat for the bonding part of the optical device and the cladding fiber;

[0028] Step six, adjusting the power of the carbon dioxide laser so that the temperature at the focal point of the ring parabolic mirror is stable;

[0029] Step seven, observing the bonding part of the optical device and the cladding fiber by a microscopic magnification system;

[0030] Step eight, turning off the vacuumizing device, opening the vacuum chamber after the air pressure in the vacuum chamber is stable, taking out the bonded device, and completing the bonding.

[0031] According to the optical fiber bonding method provided by the application, the cladding fiber to be bonded comprises a fiber body, the fiber body is provided with a glass sleeve, and the inside of the fiber body is filled with low-temperature glass powder.

[0032] In the step one, the specific operation of polishing the bonding part of the cladding fiber to be bonded is that the fiber body, the glass sleeve and the low-temperature glass powder are heated and melted to form a complete cross section of the fiber output surface, and then the fiber polishing machine is used for polishing.

[0033] According to the optical fiber bonding method provided by the application, in the step one, the cladding fiber to be bonded is a quartz optical fiber, and the optical device to be bonded is a quartz end cap.

[0034] In the step four, the time for maintaining the vacuum environment in the vacuum chamber is 24 hours; and in the step six, the time for stabilizing the temperature at the focal point of the ring parabolic mirror is 8 hours.

[0035] The application discloses the following technical effects:

[0036] This invention uses a carbon dioxide laser as a heat source. Compared with traditional electric arcs, the laser source is more concentrated, the heat-affected zone is smaller, and it is more stable and easier to control, avoiding fiber damage caused by overheating. The emitted laser beam from the carbon dioxide laser is reflected by a deflecting mirror group onto a four-sided light cone. After being dispersed into four single laser beams by the four-sided light cone, the four single laser beams are reflected by a dispersing mirror group along a reflection direction parallel to the main axis of the annular parabolic reflector. The annular parabolic reflector converges the four laser beams to the focal point, thereby uniformly and continuously heating the bonding part of the optical device and the sleeved fiber to form a bond.

[0037] This invention utilizes the focusing effect of a ring parabolic reflector on the light beam, resulting in low energy loss and the formation of a uniform cross-shaped light spot at the heating point, ensuring uniform heating at the focal point. This enables the bonding connection of optical fiber to end caps or other optical devices under low-temperature conditions.

[0038] This invention allows for real-time observation of the bonding position using a microscopic magnification system, and precise control of the bonding alignment between the optical components and the sleeved optical fiber using a five-dimensional translation stage, while maintaining a certain pressure to form a pre-bonding.

[0039] This invention uses a vacuum pump to create a vacuum chamber, thus creating a vacuum environment for heating. This improves the sealing of the gap between the optical components and the fiber optic sleeve, avoiding adverse factors such as air bubbles and residual liquid on the bonding end face. As a result, it greatly increases the bonding success rate and improves the quality of the finished product. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 For the isometric measurement of the device of the present invention Figure I ;

[0042] Figure 2 For the isometric measurement of the device of the present invention Figure II ;

[0043] Figure 3 This is a schematic diagram of the internal structure of the device of the present invention;

[0044] Figure 4 for Figure 3 A magnified view of part A in the image;

[0045] Figure 5 for Figure 3A local enlarged view of the middle B;

[0046] Figure 6 A structural schematic view of the first clamp, the second clamp and the five-dimensional translation stage in the present application;

[0047] Figure 7 A structural schematic view of the first clamp in the present application;

[0048] Figure 8 A structural schematic view of the second clamp in the present application;

[0049] Figure 9 A structural schematic view of the four-pronged light cone in the present application;

[0050] Figure 10 A structural schematic view of the annular parabolic reflector in the present application;

[0051] Figure 11 A structural schematic view of the jacketed optical fiber in the present application;

[0052] Figure 12 A structural schematic view of the microscopic amplification system in the present application;

[0053] Figure 13 A light path diagram of the emission laser beam propagation in the present application.

[0054] Wherein, 1, carbon dioxide laser; 2, observation window; 3, four-pronged light cone; 4, annular parabolic reflector; 5, first clamp; 6, second clamp; 7, five-dimensional translation stage; 8, operation table; 9, vacuum chamber; 10, molecular pump; 11, microscopic amplification system; 12, optical device; 13, jacketed optical fiber; 131, optical fiber body; 132, glass jacket; 133, low-temperature glass powder; 21, first reflector; 22, second reflector; 23, third reflector; 24, fourth reflector; 25, fifth reflector; 26, sixth reflector; 110, emission laser beam; 120, single laser beam; 130, four laser beams. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0056] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0057] REFERENCE Figures 1-13The application provides a fiber splicing device with a carbon dioxide laser as a heat source, which comprises:

[0058] An operation table 8 is provided with a vacuum chamber 9 on the top, the vacuum chamber 9 is connected with a vacuumizing device, and the vacuum chamber 9 is provided with an observation window 2 and a laser window;

[0059] A carbon dioxide laser 1 is arranged at the bottom of the operation table 8; in this embodiment, the carbon dioxide laser 1 comprises a laser cavity, a gas mixture, an excitation source, a cooling system, optical elements and a control system; by giving a control signal, the carbon dioxide laser 1 outputs a power of 0.1w-4w, and each beam of laser reaches 0.025w-1w after beam splitting;

[0060] An optical path mechanism comprises a turning mirror group, a four-pronged light cone 3 and a ring-shaped parabolic mirror 4 which are sequentially arranged on the top surface of the operation table 8; the four-pronged light cone 3 is provided with a dispersion mirror group around; the focal length of the ring-shaped parabolic mirror 4 is 14cm;

[0061] A five-dimensional translation table 7 is arranged on the operation table 8 and located between the four-pronged light cone 3 and the ring-shaped parabolic mirror 4; the five-dimensional translation table 7 is provided with a first clamp 5 and a second clamp 6, the first clamp 5 is used for fixing an optical device 12 to be spliced, and the second clamp 6 is used for fixing a jacketed optical fiber 13 to be spliced; the five-dimensional translation table 7 is divided into two parts, the first clamp 5 is arranged on the front side and can control the forward and backward displacement of the sliding block through a threaded sliding rail; the second clamp 6 is arranged on the rear side and can adjust the height Z-axis and the depth Y-axis, a spring is arranged on one side of the bottom of the second clamp 6, and an electric push rod is arranged on the other side to push, the push rod can be adjusted to control the pitch angle of the clamp, two springs are arranged on the left and right sides of one end of the second clamp 6, and two electric push rods are arranged on the other side to push, the push rod can be adjusted to control the roll angle of the clamp, and the five-axis displacement can be realized, so that the convenient and accurate position adjustment of the optical device 12 and the jacketed optical fiber 13 can be realized;

[0062] A microscopic amplification system 11 is arranged on the operation table 8 and faces the five-dimensional translation table 7, and the microscopic amplification system 11 is arranged opposite to the observation window 2;

[0063] The four-pronged light cone 3, the ring-shaped parabolic mirror 4, the dispersion mirror group, the microscopic amplification system 11 and the five-dimensional translation table 7 are all located in the vacuum chamber 9; the turning mirror group is used for reflecting the emitted laser beam 110 of the carbon dioxide laser 1 to the four-pronged light cone 3 through the laser window, and the dispersion mirror group is used for reflecting the four single beams of laser 120 dispersed by the four-pronged light cone 3 on the ring-shaped parabolic mirror 4; the reflection direction of the single beam of laser 120 is parallel to the main axis direction of the ring-shaped parabolic mirror 4; the four-pronged light cone 3 and the ring-shaped parabolic mirror 4 are coaxially arranged;

[0064] Thus, the application uses a carbon dioxide laser 1 as a heat source, compared with a traditional electric arc as a heat source, the laser light source is concentrated, the heat-affected area is small, and it is more stable and easy to control, avoiding fiber damage caused by overheating; the emitted laser beam 110 emitted by the carbon dioxide laser 1 is reflected to the four-pronged light cone 3 through the turning mirror group, dispersed into four single beams 120 through the four-pronged light cone 3, and then reflected on the annular parabolic mirror 4 along the direction parallel to the main axis direction of the annular parabolic mirror 4 through the dispersion mirror group, and the four beams of laser are converged at the focal point through the annular parabolic mirror 4, so that the bonding part of the optical device 12 and the jacket fiber 13 is uniformly and continuously gradient heated, and the bonding is formed.

[0065] The application utilizes the focusing effect of the annular parabolic mirror 4 on the light beam, has small energy loss, forms a uniform cross-shaped light spot at the heating position, and uniformly heats the focal point, so that the bonding connection of the fiber and the end cap or other optical devices is realized under low temperature conditions;

[0066] The application can observe the position of the bonding part in real time through the microscopic magnification system 11, accurately control the bonding position of the optical device 12 and the jacket fiber 13 through the five-dimensional translation table 7, and keep a certain pressure to form a pre-bonding.

[0067] The application evacuates the vacuum chamber 9 through the vacuum pumping device, so that the heating environment is in a vacuum state, improves the gap sealing property of the optical device 12 and the jacket fiber 13, avoids the existence of bubbles, residual liquid and other adverse factors on the bonding end face, thereby greatly improving the success rate of bonding and improving the quality of finished products.

[0068] Further optimization scheme, the annular width of the annular parabolic mirror 4 is slightly larger than the mirror width.

[0069] Further optimization scheme, the first clamp 5 and the second clamp 6 are installed on the five-dimensional translation table 7, and the three are an integral whole.

[0070] Further optimization scheme, the upper workbench of the operation table 8 is provided with a plurality of mounting holes.

[0071] Further optimization scheme, the first clamp 5 pushes the sliding block through the built-in electric push rod, and the sliding block clamping position has a triangular notch, which can clamp and fix the optical device 12 to be bonded.

[0072] The lower cover plate of the second clamp 6 has a triangular notch, the upper cover plate is a double-door structure, the cover plate edge has a bevel notch, and the cover plate can clamp and fix the jacket fiber 13 when closed.

[0073] Further optimization scheme, the operating platform 8 is provided with a light transmission hole, the steering mirror set includes a support installed on the operating platform 8, the support is installed with a first mirror 21 and a second mirror 22; the first mirror 21 is located below the operating platform 8, and the second mirror 22 is located above the operating platform 8; the first mirror 21 and the second mirror 22 are both 45° mirrors;

[0074] The falling point of the emitted laser beam 110 of the carbon dioxide laser 1 is located at the center of the first mirror 21 and the center of the second mirror 22, and the front end of the four-pronged light cone 3 is located on the reflected laser center axis of the second mirror 22.

[0075] Further optimization scheme, the dispersion mirror set includes a third mirror 23, a fourth mirror 24, a fifth mirror 25 and a sixth mirror 26, the third mirror 23 and the fourth mirror 24 are located above and below the four-pronged light cone 3 respectively, and the fifth mirror 25 and the sixth mirror 26 are located on both sides of the four-pronged light cone 3; the third mirror 23, the fourth mirror 24, the fifth mirror 25 and the sixth mirror 26 are all 45° mirrors.

[0076] Further optimization scheme, the carbon dioxide laser 1 is externally installed with a water cooling device;

[0077] The microscopic magnification system 11 includes a vertical camera imaging calibration device and a horizontal camera imaging calibration device, the horizontal camera imaging calibration device is installed on one side of the five-dimensional translation stage 7, and the vertical camera imaging calibration device is installed above the five-dimensional translation stage 7.

[0078] Further optimization scheme, the laser window is located on the light inlet side of the vacuum chamber 9, the observation window 2 includes a vertical strip-shaped observation window and a circular observation window, and the vertical strip-shaped observation window and the circular observation window are both installed on the vacuum chamber 9.

[0079] The vacuum chamber 9 is a half-cylindrical top structure, and the material of the laser window is zinc selenide; the vertical strip-shaped observation window serves as a skylight and is made of reinforced glass, so as to observe the overall bonding condition.

[0080] Further optimization scheme, the mirror surfaces of the first mirror 21, the second mirror 22, the third mirror 23, the fourth mirror 24, the fifth mirror 25 and the sixth mirror 26, the four-pronged light cone 3 and the ring-shaped parabolic mirror 4 are all made of aluminum or coated with a reflective film.

[0081] Further optimization scheme, the vacuumizing equipment adopts a molecular pump 10, the molecular pump 10 is communicated with the inner cavity of the vacuum chamber 9 through a vacuum pipeline, and an air exhaust valve is installed on the vacuum pipeline;

[0082] In the embodiment, the vacuum pipeline is made of a metal hard pipe.

[0083] The application also provides a fiber splicing method using a carbon dioxide laser as a heat source, comprising the following steps:

[0084] Step one: polishing, cleaning and activating the splicing parts of the to-be-spliced jacketed optical fiber 13 and the to-be-spliced jacketed optical fiber 13 respectively; the splicing parts of the to-be-spliced jacketed optical fiber 13 are polished by a grinder;

[0085] Step two: fixing the to-be-spliced optical device 12 on the first clamp 5 and fixing the to-be-spliced jacketed optical fiber 13 on the second clamp 6;

[0086] Step three: observing the positions of the optical device 12 and the jacketed optical fiber 13 through the microscopic magnification system 11, adjusting the five-dimensional translation table 7 so that the splicing parts of the optical device 12 and the jacketed optical fiber 13 are in contact and the splicing parts are at the focal point of the ring parabolic reflector 4;

[0087] Step four: vacuumizing the vacuum chamber 9 by a vacuumizing device;

[0088] Step five: turning on the carbon dioxide laser 1, the emitted laser beam 110 emitted by the carbon dioxide laser 1 is emitted to the four-pronged light cone 3 through the turning mirror group, so that the emitted laser beam 110 is evenly divided into four single laser beams 120, the four single laser beams 120 are reflected to the ring parabolic reflector 4 through the dispersing mirror group, and the ring parabolic reflector 4 converges the four laser beams 130 to the focal point to provide heat for the splicing parts of the optical device 12 and the jacketed optical fiber 13;

[0089] Step six: adjusting the power of the carbon dioxide laser 1 so that the temperature at the focal point of the ring parabolic reflector 4 is stable; in this embodiment, the temperature is between 250 DEG C and 300 DEG C;

[0090] Step seven: observing the splicing part state of the optical device 12 and the jacketed optical fiber 13 through the microscopic magnification system 11;

[0091] Step eight: turning off the vacuumizing device, opening the vacuum chamber 9 after the air pressure in the vacuum chamber 9 is stable, taking out the spliced device, and completing the splicing.

[0092] Further optimization scheme, the to-be-spliced jacketed optical fiber 13 comprises an optical fiber body 131, the optical fiber body 131 is sleeved with a glass sleeve 132, and the inside of the optical fiber body 131 is filled with low-temperature glass powder 133;

[0093] In step one, the specific operation of polishing the splicing part of the to-be-spliced jacketed optical fiber 13 is: heating and melting the optical fiber body 131, the glass sleeve 132 and the low-temperature glass powder 133 to form a complete cross section of the optical fiber output face, and polishing by an optical fiber grinder;

[0094] The outer diameter of the optical fiber body 131 is 130 μm, the outer diameter of the glass sleeve 132 is 1 mm, and the inner diameter is 500 μm;

[0095] The optical fiber body 131 and the glass sleeve 132 are connected by fusing low-temperature glass powder, so as to increase the bonding area and reduce the difficulty of thinning and polishing the optical fiber.

[0096] In the first step, the sleeve optical fiber 13 to be bonded is a quartz optical fiber, the clamping section of the quartz optical fiber has a diameter of 1 mm, and the tail fiber has a diameter less than 1 mm; the optical device 12 to be bonded is a quartz end cap, and the quartz end cap has a diameter of 8 mm.

[0097] In the fourth step, the time for maintaining the vacuum environment in the vacuum chamber 9 is twenty-four hours; in the sixth step, the time for stabilizing the temperature at the focal point of the annular parabolic reflector 4 is eight hours.

[0098] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0099] Obviously, the above embodiments of the present application are only examples for the purpose of clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary or possible to exhaust all embodiments. Any modification, equivalent replacement and improvement made within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A carbon dioxide laser as a heat source for an optical fiber splicing apparatus, characterized by, The utility model relates to a kind of optical fiber splicing device, including: Operation platform (8), the top of the operation platform (8) is equipped with openable vacuum chamber (9), the vacuum chamber (9) is communicated with vacuumizing equipment, and the vacuum chamber (9) is equipped with observation window (2) and laser window on it; Carbon dioxide laser (1), the carbon dioxide laser (1) is installed at the bottom of the operation platform (8); Light path mechanism, the light path mechanism includes the turning mirror group that is installed in the top surface of the operation platform (8) in turn, four corner light cone (3) and annular parabolic mirror (4), and the four corner light cone (3) is installed with dispersion mirror piece group around it; Five-dimensional translation stage (7), the five-dimensional translation stage (7) is installed on the operation platform (8), and is located between the four corner light cone (3) and the annular parabolic mirror (4);First clamp (5) and second clamp (6) are installed on the five-dimensional translation stage (7), and the first clamp (5) is used to fix optical device (12) to be spliced, and the second clamp (6) is used to fix jacket fiber (13) to be spliced; Microscopic magnification system (11), the microscopic magnification system (11) is installed on the operation platform (8), and is towards the five-dimensional translation stage (7), and the microscopic magnification system (11) is arranged opposite to the observation window (2); Wherein, the four corner light cone (3), the annular parabolic mirror (4), the dispersion mirror piece group, the microscopic magnification system (11), the five-dimensional translation stage (7) are located in the vacuum chamber (9);The turning mirror group is used to reflect the emission laser beam (110) emitted by the carbon dioxide laser (1) to the four corner light cone (3) through the laser window, and the dispersion mirror piece group is used to reflect four single-beam lasers (120) dispersed by the four corner light cone (3) on the annular parabolic mirror (4);The reflection direction of the single-beam laser (120) is parallelly arranged with the main axis direction of the annular parabolic mirror (4); Light hole is opened in the operation platform (8), and the turning mirror group includes support installed on the operation platform (8), and the support is installed with first mirror (21) and second mirror (22);The first mirror (21) is located below the operation platform (8), and the second mirror (22) is located above the operation platform (8);The first mirror (21) and the second mirror (22) are all 45 ° mirrors; The landing point of the emission laser beam (110) of the carbon dioxide laser (1) is located at the center of the first mirror (21) and the center of the second mirror (22), and the front end of the four corner light cone (3) is located on the reflection laser central axis of the second mirror (22).

2. The carbon dioxide laser powered fiber splicing apparatus of claim 1, wherein: The dispersing mirror group comprises a third mirror (23), a fourth mirror (24), a fifth mirror (25) and a sixth mirror (26), the third mirror (23) and the fourth mirror (24) are located above and below the four-rib light cone (3) respectively, and the fifth mirror (25) and the sixth mirror (26) are located on the two sides of the four-rib light cone (3) respectively; the third mirror (23), the fourth mirror (24), the fifth mirror (25) and the sixth mirror (26) are all 45° mirrors.

3. The carbon dioxide laser powered fiber splicing apparatus of claim 1, wherein: The carbon dioxide laser (1) is externally provided with a water cooling device; The microscopic magnification system (11) comprises a vertical camera imaging calibration device and a horizontal camera imaging calibration device, the horizontal camera imaging calibration device is installed on one side of the five-dimensional translation stage (7), and the vertical camera imaging calibration device is installed above the five-dimensional translation stage (7).

4. The carbon dioxide laser powered fiber splicing apparatus of claim 1, wherein: The laser window is located on the light inlet side of the vacuum chamber (9), and the observation window (2) comprises a vertical strip-shaped observation window and a circular observation window, and the vertical strip-shaped observation window and the circular observation window are both installed on the vacuum chamber (9).

5. The carbon dioxide laser heated optical fiber splicing apparatus of claim 2 wherein: The mirror surfaces of the first mirror (21), the second mirror (22), the third mirror (23), the fourth mirror (24), the fifth mirror (25) and the sixth mirror (26), the four-rib light cone (3) and the ring-shaped parabolic mirror (4) are all made of aluminum or coated with a reflective film.

6. The carbon dioxide laser powered fiber splicing apparatus of claim 1, wherein: The vacuumizing equipment adopts a molecular pump (10), the molecular pump (10) is communicated with the inner cavity of the vacuum chamber (9) through a vacuum pipeline, and an air exhaust valve is installed on the vacuum pipeline.

7. A method of optical fiber splicing using a carbon dioxide laser as a heat source, based on the optical fiber splicing apparatus using a carbon dioxide laser as a heat source according to any one of claims 1 to 6, characterized by, The method comprises the following steps: Step one, polishing, cleaning and activating the bonding parts of the to-be-bonded jacketed optical fiber (13) and the to-be-bonded jacketed optical fiber (13) respectively; Step two, fixing the to-be-bonded optical device (12) on the first clamp (5) and fixing the to-be-bonded jacketed optical fiber (13) on the second clamp (6); Step three, observing the positions of the optical device (12) and the jacketed optical fiber (13) through the microscopic magnification system (11), adjusting the five-dimensional translation stage (7), so that the bonding parts of the optical device (12) and the jacketed optical fiber (13) are attached, and the bonding parts are located at the focal point of the ring-shaped parabolic mirror (4); Step four, vacuumizing the inner cavity of the vacuum chamber (9) through the vacuumizing equipment; Step five, turning on the carbon dioxide laser (1), and emitting the emitted laser beam (110) of the carbon dioxide laser (1) to the four-rib light cone (3) through the turning mirror group, so that the emitted laser beam (110) is divided into four single laser beams (120), the four single laser beams (120) are reflected to the ring-shaped parabolic mirror (4) through the dispersing mirror group, the ring-shaped parabolic mirror (4) converges the four laser beams (130) to the focal point, and provides heat for the bonding parts of the optical device (12) and the jacketed optical fiber (13). Step six, adjust the power of the carbon dioxide laser (1), so that the focal point of the annular parabolic mirror (4) temperature stability; Step seven, through the microscopic magnification system (11) observe the bonding part state of the optical device (12) and the jacketed optical fiber (13); Step eight, close the vacuum device, the vacuum chamber (9) after the pressure stabilizes open the vacuum chamber (9), take out the bonded device, complete the bonding.

8. The fiber bonding method using a carbon dioxide laser as a heat source according to claim 7, characterized in that: The jacketed optical fiber (13) to be bonded comprises a fiber body (131), the fiber body (131) is provided with a glass sleeve (132), and the inside of the fiber body (131) is filled with low-temperature glass powder (133); In the step one, the specific operation of polishing the bonding part of the jacketed optical fiber (13) to be bonded is that the fiber body (131), the glass sleeve (132) and the low-temperature glass powder (133) are heated and melted to form a complete cross section of the fiber output surface, and then polished by a fiber grinding machine.

9. The fiber bonding method using a carbon dioxide laser as a heat source according to claim 7, characterized in that: In the step one, the jacketed optical fiber (13) to be bonded is a quartz optical fiber, and the optical device (12) to be bonded is a quartz end cap. In the step four, the time for maintaining the vacuum environment in the vacuum chamber (9) is twenty-four hours; in the step six, the time for stabilizing the temperature at the focal point of the annular parabolic mirror (4) is eight hours.

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