Glass capillary bell mouth processing device and method based on laser heating

Abstract

The invention discloses a glass capillary bell mouth processing device and method based on laser heating, comprising a laser and an optical system, wherein the laser is used to emit laser light, and the optical system is arranged at the light output end of the laser and is used to converge the light emitted by the laser onto an area of ​​the capillary end face centered on a central hole to perform a bell mouth type glass melting process on the capillary end face, thereby ensuring the quality of the processed glass tube bell mouth and greatly reducing the processing cost.

Description

Technical Field

[0001] The invention belongs to the technical field of glass processing, and in particular relates to a glass capillary bell mouth processing device and method based on laser heating. Background Art

[0002] Optical fiber is a transmission channel for light and a basic device for modern optical signal transmission and optical energy transmission. When light needs to be drawn out of the optical fiber or injected into the optical fiber, the optical fiber end face needs to be processed to meet the requirements of optical input and output. Since the optical fiber is very thin, in order to operate the optical fiber surface, it is necessary to clamp the optical fiber with a glass capillary. Since the inner hole of the capillary and the optical fiber are precisely matched, in order to facilitate the optical fiber to penetrate the inner hole of the capillary, a bell mouth is usually processed on the end face of the glass capillary. At present, there are three methods for processing the bell mouth of the capillary end face: mechanical method, chemical etching method and hot blowing method. The disadvantage of the mechanical processing method is that there will be microcracks in the processed bell mouth area, which affects the reliability of the capillary. The disadvantage of the chemical etching method is that it is not environmentally friendly. The current hot-blowing processing method is: (1) heat a capillary filament with a diameter margin at multiple locations along the tube axis at the same time; (2) when the temperature reaches the glass softening point, blow air into the tube to pressurize it, and the heated area will expand under the action of air pressure, forming a bell mouth inside the tube; (3) after cooling, grind and polish the capillary filament with the bell mouth on a centerless grinder to the specified size; (4) cut in the bell mouth area to obtain a capillary product with a bell mouth on the end face. This method is complex to process and has high cost. Summary of the invention

[0003] The purpose of the present invention is to provide a glass capillary bell mouth processing device and method based on laser heating to overcome the problems existing in the prior art. The present invention can ensure the quality of the processed glass tube bell mouth and greatly reduce the processing cost.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme:

[0005] A glass capillary flare processing device based on laser heating comprises a laser and an optical system. The laser is used to emit laser light. The optical system is arranged at the light output end of the laser and is used to converge the light emitted by the laser onto an area of ​​the end face of one end of the capillary centered on the central hole, so as to perform glass melting processing on the flare of the capillary end face.

[0006] Furthermore, it also includes a capillary clamping device and an air blowing device, wherein the capillary clamping device is used to clamp the capillary, and the air blowing device is connected to the other end of the capillary and is used to blow gas into the other end of the capillary to blow away the molten glass on the laser irradiated end face.

[0007] Furthermore, the laser is a carbon dioxide laser; and the optical system is a reflective focusing optical system or a germanium lens system.

[0008] Furthermore, the reflective focusing optical system is a copper reflective focusing lens.

[0009] Furthermore, the laser is a semiconductor laser, a fiber laser or a YAG solid laser; and the optical system is made of conventional optical glass.

[0010] Furthermore, it also includes a light-absorbing material arranged in a central hole at one end of the glass capillary, and the light-absorbing material is used to absorb laser light to increase the temperature and melt the glass.

[0011] Furthermore, the light absorbing material is steel wire.

[0012] A method for processing the bell mouth of a glass capillary based on laser heating is characterized in that a laser beam is used to irradiate an area centered on the center hole on the end face of the capillary. The laser is in the glass absorption band, so that the glass in the irradiated area on the end face of the capillary is melted and the center hole is closed due to the melting of the glass; then air is blown toward the center hole of the glass capillary at the other end to blow away the melted glass at the laser irradiated end.

[0013] A method for processing a bell mouth of a glass capillary based on laser heating comprises the following steps: setting a light-absorbing material in the center hole at one end of the capillary; irradiating an area on the end face of the capillary centered on the center hole with a laser in a non-absorption band of the glass, so that the glass body in the irradiated area on the end face of the capillary is melted and bonded to the light-absorbing material; and blowing air toward the center hole of the capillary at the other end of the capillary to blow away the melted glass body and the light-absorbing material at the laser irradiated end.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects:

[0015] The present invention uses a laser in conjunction with an optical system to perform laser melting of the glass at the end face of the capillary, thereby being able to efficiently and quickly achieve bell-mouth processing of the capillary. The structural design of the present invention is reasonable and ingenious, effectively avoiding the risk of microcracks in bell-mouth processing by mechanical processing methods, and greatly improving the reliability of the capillary. At the same time, the present invention can avoid the environmental problems caused by chemical corrosion methods. It should also be noted that the structural design of the present invention is simple, and conventional materials are used, which greatly reduces the cost of processing the bell-mouth of the capillary by thermal processing methods, and has broad market prospects.

[0016] Furthermore, the present invention also ensures the stability of the processing process by arranging a capillary clamping device and an air blowing device. The capillary is stably fixed by the capillary clamping device, and the other end of the capillary is connected by the air blowing device, and gas is blown into the other end of the capillary to blow away the molten glass on the laser irradiated end face. The operation is simple, and the molten glass can be cleaned quickly and thoroughly.

[0017] Furthermore, the present invention can select an optical system supported by spherical optical glass as a laser focusing system, which can greatly reduce the cost, and by selecting a semiconductor laser, a fiber laser or a YAG solid laser, it can avoid the influence of the laser on the optical system, improve the service life, and ensure working stability and controllability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings in the specification are used to provide further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 This is a schematic structural diagram of the first capillary bell mouth processing device based on laser heating proposed by the present invention.

[0020] Figure 2 This is a schematic structural diagram of a second capillary bell mouth processing device based on laser heating proposed in the present invention.

[0021] Figure 3 This is a schematic structural diagram of the third capillary bell mouth processing device based on laser heating proposed by the present invention.

[0022] Among them: L-1, L-2 and L-3 are lasers; IM-1, IM-2 and IM-3 are optical systems; JCJ-1, JCJ-2 and JCJ-3 are capillary holders; GQ-1, GQ-2 and GQ-3 are air blowing devices; MXG is a capillary. DETAILED DESCRIPTION

[0023] The following is a detailed description of the method and device for processing the bell mouth of a glass capillary based on laser heating proposed by the present invention in conjunction with the accompanying drawings and specific embodiments.

[0024] The present invention proposes a first method for processing a bell mouth of a glass capillary based on laser heating, which uses laser to heat the peripheral area of ​​the central hole of the end face of the glass capillary, and uses gas to peel off the molten glass to form a bell mouth. The processing method includes the following steps: (1) using a beam of laser to irradiate the area centered on the central hole on the end face of the glass capillary, the laser is in the glass absorption band, so that the glass body in the irradiated area on the end face of the glass capillary melts and the central hole is closed due to the melting of the glass; (2) blowing air toward the central hole of the glass capillary at the other end of the glass capillary to blow away the molten glass body at the laser irradiation end. This method can process a bell mouth on the end face of the glass capillary.

[0025] Based on the same concept, the present invention proposes a second method for processing a bell mouth of a glass capillary based on laser heating, comprising the following steps: (1) placing a light-absorbing material within a certain depth range in the central hole at one end of the glass capillary; (2) irradiating an area centered on the central hole on the end face of the glass capillary with a laser beam, the laser being in the non-absorption band of the glass, so that the glass body in the irradiated area on the end face of the glass capillary melts and adheres to the light-absorbing material; (3) blowing air toward the central hole of the glass capillary at the other end to blow away the melted glass body and the light-absorbing material at the laser irradiated end. This method can process a bell mouth on the end face of the glass capillary.

[0026] According to the above two glass capillary bell mouth processing methods based on laser heating, the present invention provides a capillary bell mouth processing device, including a laser, an optical system, a capillary clamping device, and an air blowing device;

[0027] See also Figures 1 to 3 The capillary clamping device is used to clamp the capillary, the laser is used to emit laser, and the optical system is arranged at the light output end of the laser, and is used to converge the light emitted by the laser to the area of ​​the end face of the capillary MXG centered on the center hole; the air blowing device is used to connect the other end of the capillary, and is used to blow gas into the other end of the capillary to blow away the molten glass on the laser irradiated end face.

[0028] exist Figure 1 and Figure 2 In the embodiment shown, since glass usually absorbs light with a wavelength of more than 4 microns, in this embodiment, when the laser is a carbon dioxide laser, that is, the wavelength of the laser is in the absorption zone of the glass, the optical system adopts a reflective focusing optical system or a system composed of a germanium lens; at this time, the laser emits light, which is converged on an area of ​​the end face of the capillary with the center hole as the center through the optical system, and the glass in the area is melted, the center hole of the capillary is closed, and gas is blown into the other end of the capillary to blow away the molten glass on the laser irradiated end face to form a bell mouth.

[0029] like Figure 3In the embodiment shown, if a conventional 1 micron band laser, such as a semiconductor laser, a fiber laser or a YAG solid laser, is used on the device, the optical system is composed of a conventional glass lens. In order to melt the glass body in the end face irradiation area, a light-absorbing material needs to be set within a certain depth range in the central hole of the capillary. When the laser is irradiated, the light-absorbing material absorbs the laser energy and melts the surrounding glass body. The two are bonded together. Gas is blown into the other end of the glass capillary to blow away the light-absorbing material and the molten glass body to form a flare. In this embodiment, the optical system is made of conventional glass, and the light-absorbing material is steel wire.

[0030] like Figure 1 As shown, as a preferred embodiment of the present invention, in this embodiment, the laser L-1 adopts a carbon dioxide laser with a power of 300 watts, and the optical system IM-1 is composed of a germanium lens. The light emitted by the laser is converged by the optical lens onto the end face of the capillary MXG mounted on the capillary clamping device JCJ-1. The irradiation area has a diameter of 0.5 mm and is centered on the central hole of the capillary MXG; the blowing device GQ-1 connected to the other end of the capillary MXG injects gas into the capillary to blow away the glass body after the glass is melted.

[0031] like Figure 2 As shown, as another preferred embodiment of the present invention, in this embodiment, the laser L-2 selects a carbon dioxide laser with a power of 300 watts, and the optical system IM-2 is a copper reflecting focusing lens. The light emitted by the carbon dioxide laser is converged by the copper reflecting focusing lens onto the end face of the capillary MXG mounted on the capillary clamping device JCJ-2. The irradiation area has a diameter of 0.5 mm and is centered on the center hole of the capillary MXG. The air blowing device GQ-2 connected to the other end of the capillary MXG injects gas into the capillary to blow away the glass body after the glass is melted.

[0032] like Figure 3 As shown, as another preferred embodiment of the present invention, in this embodiment, the laser L-3 is a fiber-coupled output semiconductor laser with a power of 300 watts. The optical system IM-3 is composed of an ordinary glass lens. The light emitted by the laser is converged by the optical lens onto the end face of the capillary MXG mounted on the capillary clamping device JCJ-3. The irradiation area has a diameter of 0.5 mm and is centered on the central hole of the capillary MXG. The air blowing device GQ-3 connected to the other end of the capillary MXG is used to blow away the glass body after the glass is melted by injecting gas into the capillary MXG. In this device, a 2 mm long steel wire is inserted into the central hole of the irradiated end of the capillary. After the steel wire absorbs the energy of the semiconductor laser, it melts the glass body in the surrounding area.

[0033] Compared with the existing technical solutions, the capillary bell mouth processing method and device based on laser heating provided by the present invention can avoid bell mouth processing cracks, avoid environmental pollution problems, and reduce processing costs.

[0034] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A glass capillary bell mouth processing device based on laser heating, characterized in that: The invention comprises a laser and an optical system, wherein the laser is used to emit laser light, and the optical system is arranged at the light output end of the laser and is used to converge the light emitted by the laser onto an area of ​​the end face of one end of the capillary tube centered on the central hole, so as to perform a glass melting process on the flare mouth of the end face of the capillary tube; It also includes a capillary clamping device and an air blowing device. The capillary clamping device is used to clamp the capillary. The air blowing device is connected to the other end of the capillary and is used to blow gas into the other end of the capillary to blow away the molten glass on the laser irradiated end face.

2. The laser-heated glass capillary bell mouth processing device according to claim 1, characterized in that: The laser is a carbon dioxide laser; and the optical system is a reflective focusing optical system.

3. The laser-heated glass capillary bellmouth processing device according to claim 2, characterized in that: The reflective focusing optical system is a copper reflective focusing lens or a germanium lens system.

4. The laser-heated glass capillary flare processing device according to claim 1, characterized in that: The laser is a semiconductor laser or a YAG solid laser; the optical system is made of optical glass.

5. The laser-heated glass capillary flare processing device according to claim 4, characterized in that: It also includes a light-absorbing material disposed in a central hole at one end of the glass capillary, wherein the light-absorbing material is used to absorb laser light to increase the temperature and melt the glass.

6. The laser-heated glass capillary flare processing device according to claim 5, characterized in that: The light absorbing material is steel wire.

7. A method for processing a glass capillary bell mouth based on laser heating, characterized in that: A laser beam is used to irradiate the area centered on the center hole on the end face of the capillary. The laser is in the glass absorption band, so that the glass in the irradiated area on the end face of the capillary melts and the center hole is closed due to the melting of the glass; then air is blown toward the center hole of the glass capillary at the other end to blow away the melted glass at the laser irradiated end.

8. A method for processing a glass capillary bell mouth based on laser heating, characterized in that: A light-absorbing material is arranged in the center hole at one end of the capillary; a laser is used to irradiate the area centered on the center hole on the end face of the capillary, and the laser is in the non-absorption band of glass, so that the glass body in the irradiated area on the end face of the capillary melts and bonds with the light-absorbing material; air is blown toward the center hole of the capillary at the other end of the capillary to blow away the melted glass body and light-absorbing material at the laser irradiated end.

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