CN111995262A - Ultraviolet optical fiber and preparation method thereof - Google Patents
Ultraviolet optical fiber and preparation method thereof Download PDFInfo
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- CN111995262A CN111995262A CN202010925996.2A CN202010925996A CN111995262A CN 111995262 A CN111995262 A CN 111995262A CN 202010925996 A CN202010925996 A CN 202010925996A CN 111995262 A CN111995262 A CN 111995262A
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- optical fiber
- hydrogen
- ultraviolet
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/60—Surface treatment of fibres or filaments made from glass, minerals or slags by diffusing ions or metals into the surface
- C03C25/607—Surface treatment of fibres or filaments made from glass, minerals or slags by diffusing ions or metals into the surface in the gaseous phase
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/10—Non-chemical treatment
- C03B37/12—Non-chemical treatment of fibres or filaments during winding up
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/10—Non-chemical treatment
- C03B37/16—Cutting or severing
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/62—Surface treatment of fibres or filaments made from glass, minerals or slags by application of electric or wave energy; by particle radiation or ion implantation
- C03C25/6206—Electromagnetic waves
- C03C25/6226—Ultraviolet
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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
- G02B6/02—Optical fibres with cladding with or without a coating
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention relates to an ultraviolet optical fiber and a preparation method thereof, wherein a glass optical fiber perform is firstly manufactured, the glass optical fiber perform is clamped in a wire drawing furnace, and the glass optical fiber perform is drawn into an optical fiber at high temperature. According to the invention, hydrogen molecules gradually permeate into the optical fiber through the hydrogen-carrying treatment of the optical fiber, and ultraviolet rays are coupled into the fiber core of the hydrogen-carrying optical fiber through ultraviolet irradiation curing to cause the change of the refractive index of the fiber core, so that the color center defect of the optical fiber is well compensated, the transmittance of the optical fiber in an ultraviolet band is greatly improved, the absorption coefficient of the optical fiber in the ultraviolet band is greatly reduced, the transmission efficiency of the optical fiber in the ultraviolet band is effectively improved, and the optical fiber has important application value in the field of transmission and processing of ultraviolet laser. The preparation method provided by the invention is simple and practical and is easy to realize.
Description
Technical Field
The invention relates to an ultraviolet optical fiber and a preparation method thereof, belonging to the field of special optical fiber preparation.
Background
The ultraviolet laser has the characteristics of short wavelength, high single photon energy, low thermal effect and the like, has incomparable advantages of a traditional wavelength laser light source in the field of laser fine processing, and is particularly suitable for the application fields of marking, micropore punching and high-speed division of glass materials for food and medicine packaging materials, complex pattern cutting of silicon wafer wafers and the like. Ultraviolet laser fine processing has become an important processing mode in the field of precision processing at present.
The laser can be flexibly transmitted and processed by transmitting the laser through the optical fiber, various commercial transmitting optical fibers are used for flexibly transmitting and manufacturing the laser in a near-infrared band at present, and in the field of violet laser, ultraviolet quenching resin curing, mechanical micromachining and manufacturing, medical treatment, grating manufacturing, ultraviolet detection, environmental protection and other fields can be carried out by means of ultraviolet optical fibers. This is mainly due to the fact that the ultraviolet laser generates color center defects in the quartz fiber transmission process, and the defects prevent the transmission of the ultraviolet laser. Such as E' core defects (Si. or Ge. with absorption peaks at 215nm/630nm and 245nm/325nm, respectively), BOH defects (nonbridging oxygen vacancies, Si-O. O-Si, with absorption peaks at 265nm/630 nm). The transmission fiber can be rapidly aged (darkened) in the ultraviolet band, resulting in a sharp increase in the loss in the ultraviolet band, which is the so-called ultraviolet suppression effect of the fiber. Chinese patent document CN1187629C reports a method of performing ultraviolet irradiation on an optical fiber preform and then performing heat treatment on the preform at a high temperature in a drawing furnace to improve the transmission efficiency of the optical fiber in the ultraviolet band. The chinese patent document CN10141402B improves the transmission efficiency of the ultraviolet band by specially designing the refractive index profile of the optical fiber, increases the complexity of the waveguide design, and the band mainly improved by the transmission efficiency is below 600nm and has a certain distance from the ultraviolet window.
Disclosure of Invention
The invention aims to solve the problem of providing the ultraviolet optical fiber and the preparation method thereof aiming at the defects in the prior art, the method has simple and convenient process, and can effectively improve the transmission efficiency of the optical fiber in the ultraviolet band.
The technical scheme adopted by the invention for solving the problems is as follows:
the method is characterized in that the drawn optical fiber is subjected to hydrogen-carrying pretreatment, and finally the optical fiber subjected to hydrogen-carrying pretreatment is subjected to ultraviolet radiation curing.
According to the scheme, the hydrogen-carrying pretreatment is to wind the drawn optical fiber on an optical fiber disc, put the optical fiber disc into a hydrogen tank with the concentration of more than 95% and the pressure of 5-15 MPa, and enable hydrogen molecules to gradually permeate into the optical fiber after a period of time to enter an optical fiber cladding and a fiber core.
According to the scheme, the hydrogen-carrying pretreatment time is at least 2 days.
According to the scheme, the ultraviolet radiation curing is to couple an ultraviolet light source into the fiber core of the hydrogen-loaded optical fiber in a coupling mode, or to directly carry out ray radiation on the hydrogen-loaded pretreated optical fiber through the ultraviolet light source, wherein the wavelength of the ultraviolet light source is 100-390 nm.
According to the scheme, the coupling mode comprises the following steps: coiling the hydrogen-carrying optical fiber: coiling the hydrogen-loaded optical fiber on a coiling device, and leading out two ends of the optical fiber from the coiling device; and (3) processing the end face of the hydrogen-carrying optical fiber: cutting and grinding the end faces of two ends of the hydrogen-carrying optical fiber to ensure that the end faces of the optical fiber are flat and smooth; ultraviolet light source coupling: placing one end of the hydrogen-carrying optical fiber into a clamping device, aligning the other end of the hydrogen-carrying optical fiber with a probe of a monitoring and testing device, turning on an ultraviolet light source, adjusting a coupling device and the clamping device to couple the ultraviolet light source with the end face of the hydrogen-carrying optical fiber, coupling ultraviolet rays into a fiber core of the hydrogen-carrying optical fiber, displaying the maximum output on an indicator of the monitoring and testing device, observing the output power or energy fluctuation on the indicator of the monitoring and testing device, and continuously radiating for minutes or more after the number is stable.
According to the scheme, the ultraviolet light source is a pulse or continuous laser or a light emitting diode, the coupling device is a lens coupler, and the clamping device is an optical fiber clamp.
According to the scheme, the optical fiber is an energy transmission optical fiber and comprises a core layer and a cladding, the diameter of the core layer is 3-400 microns, the NA value of the core layer and the cladding is 0.1-0.22, and the diameter of the cladding is 80-600 microns, preferably 80-125 microns.
According to the scheme, the diameter of the optical fiber core layer is 6-10 μm, or 50 μm, or 62.5 μm, or 80-200 μm.
According to the scheme, the diameter of the cladding is 80-600 microns, preferably 80-125 microns, or 150-300 microns.
The invention has the beneficial effects that: 1. hydrogen molecules gradually permeate into the optical fiber through the hydrogen-carrying treatment of the optical fiber, ultraviolet radiation is cured to couple ultraviolet rays into a fiber core of the hydrogen-carrying optical fiber, free hydrogen molecules loaded into the optical fiber react with doping elements in the fiber core to generate stable-OH bonds or-H bonds under the irradiation of a violet light source, the refractive index of the fiber core is changed, the defect of the color center of the optical fiber is well compensated, the transmittance of the optical fiber in an ultraviolet band is greatly improved, the absorption coefficient of the optical fiber in the ultraviolet band is greatly reduced, the transmission efficiency of the optical fiber in the ultraviolet band is effectively improved, and the optical fiber has important application value in the field of transmission and processing of ultraviolet laser. 2. The preparation method provided by the invention is simple and practical and is easy to realize.
Drawings
FIG. 1 is a block diagram of a process according to one embodiment of the present invention.
FIG. 2 is a schematic illustration of an embodiment of the present invention in which an ultraviolet light source is coupled into a hydrogen-carrying optical fiber.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1: preparing a quartz optical fiber preform by PCVD (plasma chemical vapor deposition), and introducing SiCl into a quartz tube4，GeCl4，C2F6And O and2and (3) waiting for reaction gas, accurately controlling gas flow and reaction power, depositing quartz optical fiber components on the tube wall, fusing and shrinking the deposited quartz tube into a solid rod at a high temperature of about 2000 ℃, and assembling the solid rod and a quartz sleeve into a prefabricated rod. Clamping a quartz preform by using a chuck, slowly lifting the quartz preform into a drawing furnace at the drawing temperature of 1600-2100 ℃, drawing by using a traction wheel, coating acrylic resin on a quartz cladding layer in the drawing process, curing a coating by using an ultraviolet light source, winding an optical fiber on an optical fiber disc after drawing is finished, placing the optical fiber in a hydrogen tank with the hydrogen concentration of 100% and the pressure of 5MPa for 5 days, irradiating the optical fiber by using a pulse laser with the wavelength of 351nm and the single pulse energy of 0.1mj after hydrogen loading is finished, and ensuring that the transmittance of the irradiated optical fiber in the ultraviolet band is about 90% per 10 m.
Example 2: preparing prefabricated quartz fiber rod by MCVD and introducing SiCl into the quartz tube4，POCl3，BBr3And H2，O2Reacting the reaction gas at high temperature to deposit quartz fiber component on the tube wall, fusing the deposited quartz tube into solid rod at about 2000 deg.c, and assembling the solid rod and the quartz sleeve to form prefabricated rod. Clamping the quartz preform with a chuck, anSlowly raising the temperature of the drawn fiber into a drawing furnace, drawing the drawn fiber at 1600-2100 ℃ by a traction wheel, coating polyimide on a quartz cladding and thermally curing a coating in the drawing process, winding the fiber on a fiber tray after drawing is finished, placing the fiber on a hydrogen tank with the hydrogen concentration of 100% and the pressure of 15MPa for 3 days, irradiating the fiber by using a power milliwatt continuous laser with the wavelength of 248nm after hydrogen loading is finished, and ensuring that the transmittance of the irradiated fiber in an ultraviolet band is about 90% per 10 m.
Example 3: the diameter of a core of a quartz optical fiber is 105 micrometers, the cladding is 125 micrometers, the hydrogen carrying pressure is 10MPa, the hydrogen concentration is 99%, the hydrogen carrying time is 15 days, the wavelength of an ultraviolet light source is 337nm, the power is 1.5W, the clear aperture of a coupling lens 2 is 5mm, 46 meters of the quartz optical fiber which just carries hydrogen is taken, the quartz optical fiber is wound on an optical fiber disc 4 under low tension, two ends of the quartz optical fiber are cut and ground, the end face is smooth, the quartz optical fiber is placed in an optical fiber clamp 3, one end of the quartz optical fiber is located near the focus of the coupling lens, the other end of the quartz optical fiber is connected with a power detector 5, the position of the optical fiber clamp is adjusted, the reading of the power. After one month, the UV-cured hydrogen-loaded fiber was tested to have a loss of 0.082dB/m at 337nm, and the uncured hydrogen-loaded fiber was tested to have a loss of 0.6dB/m at 337 nm.
Claims (10)
1. A method for preparing ultraviolet optical fiber includes preparing prefabricated glass fiber rod, clamping said prefabricated glass fiber rod in drawing furnace, drawing said prefabricated glass fiber rod into optical fiber at high temp, carrying out hydrogen-carrying pretreatment on drawn optical fiber and finally ultraviolet radiation solidifying.
2. The method for preparing the ultraviolet optical fiber according to claim 1, wherein the hydrogen-carrying pretreatment comprises placing the drawn optical fiber into a hydrogen tank with a concentration of 95% or more and a pressure of 5-15 MPa, and allowing hydrogen molecules to gradually permeate into the optical fiber after a period of time to enter into a cladding and a core of the optical fiber.
3. The process of claim 2, wherein the hydrogen-loading pretreatment is carried out for a period of at least 2 days.
4. The method for preparing the ultraviolet optical fiber according to claim 1 or 2, characterized in that the ultraviolet radiation curing is coupling an ultraviolet light source into a fiber core of the hydrogen-carrying optical fiber in a coupling mode, or directly performing ray radiation on the hydrogen-carrying pretreated optical fiber through an ultraviolet light source, wherein the wavelength of the ultraviolet light source is 100-390 nm.
5. The method of making an ultraviolet optical fiber as defined in claim 4, wherein said coupling means comprises: coiling the hydrogen-carrying optical fiber: coiling the hydrogen-loaded optical fiber on a coiling device, and leading out two ends of the optical fiber from the coiling device; and (3) processing the end face of the hydrogen-carrying optical fiber: cutting and grinding the end faces of two ends of the hydrogen-carrying optical fiber to ensure that the end faces of the optical fiber are flat and smooth; ultraviolet light source coupling: placing one end of the hydrogen-carrying optical fiber into a clamping device, aligning the other end of the hydrogen-carrying optical fiber with a probe of a monitoring and testing device, turning on an ultraviolet light source, adjusting a coupling device and the clamping device to couple the ultraviolet light source with the end face of the hydrogen-carrying optical fiber, coupling ultraviolet rays into a fiber core of the hydrogen-carrying optical fiber, displaying the maximum output on an indicator of the monitoring and testing device, observing the output power or energy fluctuation on the indicator of the monitoring and testing device, and continuously radiating for minutes or more after the number is stable.
6. A method of making an ultraviolet optical fiber as defined in claim 5, wherein said ultraviolet light source is a pulsed or continuous laser, or a light emitting diode.
7. A method of making an ultraviolet optical fiber as defined in claim 5 or 6, wherein said coupling means is a lens coupler and said holding means is a fiber holder.
8. The ultraviolet optical fiber according to any one of the preparation methods of claims 1 to 7, wherein the optical fiber is an energy-transmitting optical fiber comprising a core layer and a cladding layer, the diameter of the core layer is 3 to 400 μm, the NA values of the core layer and the cladding layer are 0.1 to 0.22, and the diameter of the cladding layer is 80 to 600 μm.
9. The ultraviolet optical fiber according to claim 8, wherein the core diameter of the optical fiber is 6 to 10 μm, or 50 μm, or 62.5 μm, or 80 to 200 μm.
10. The method of claim 8, wherein the cladding has a diameter of 80-125 μm, or 150-300 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010925996.2A CN111995262A (en) | 2020-09-07 | 2020-09-07 | Ultraviolet optical fiber and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010925996.2A CN111995262A (en) | 2020-09-07 | 2020-09-07 | Ultraviolet optical fiber and preparation method thereof |
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| CN111995262A true CN111995262A (en) | 2020-11-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115057631A (en) * | 2022-04-26 | 2022-09-16 | 苏州创鑫激光科技有限公司 | Bleaching method and device for reducing photodarkening induction loss |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000086273A (en) * | 1998-09-14 | 2000-03-28 | Fujikura Ltd | Production of optical fiber for ultraviolet ray transmission |
| US20020061810A1 (en) * | 1997-05-16 | 2002-05-23 | Sumitomo Electric Industries, Ltd. | Silica glass article and manufacturing process therefor |
| JP2003012348A (en) * | 2001-06-29 | 2003-01-15 | Sumitomo Electric Ind Ltd | Method for manufacturing optical waveguide |
| CN1609639A (en) * | 2004-10-27 | 2005-04-27 | 上海大学 | Ultraviolet optical fiber with high-transmission ability and producing method thereof, and deposition apparatus containing high-hydroxyl optical fibre prefabricated bar |
| US20060248925A1 (en) * | 2005-04-06 | 2006-11-09 | Sanders Paul E | Conditioning optical fibers for improved ionizing radiation response |
| CN111410418A (en) * | 2020-05-18 | 2020-07-14 | 中国科学院精密测量科学与技术创新研究院 | Deep ultraviolet single-mode polarization maintaining optical fiber manufacturing device and method |
-
2020
- 2020-09-07 CN CN202010925996.2A patent/CN111995262A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020061810A1 (en) * | 1997-05-16 | 2002-05-23 | Sumitomo Electric Industries, Ltd. | Silica glass article and manufacturing process therefor |
| JP2000086273A (en) * | 1998-09-14 | 2000-03-28 | Fujikura Ltd | Production of optical fiber for ultraviolet ray transmission |
| JP2003012348A (en) * | 2001-06-29 | 2003-01-15 | Sumitomo Electric Ind Ltd | Method for manufacturing optical waveguide |
| CN1609639A (en) * | 2004-10-27 | 2005-04-27 | 上海大学 | Ultraviolet optical fiber with high-transmission ability and producing method thereof, and deposition apparatus containing high-hydroxyl optical fibre prefabricated bar |
| US20060248925A1 (en) * | 2005-04-06 | 2006-11-09 | Sanders Paul E | Conditioning optical fibers for improved ionizing radiation response |
| CN111410418A (en) * | 2020-05-18 | 2020-07-14 | 中国科学院精密测量科学与技术创新研究院 | Deep ultraviolet single-mode polarization maintaining optical fiber manufacturing device and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115057631A (en) * | 2022-04-26 | 2022-09-16 | 苏州创鑫激光科技有限公司 | Bleaching method and device for reducing photodarkening induction loss |
| CN115057631B (en) * | 2022-04-26 | 2024-02-02 | 苏州创鑫激光科技有限公司 | Bleaching method and device for reducing photodarkening induced loss |
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Application publication date: 20201127 |
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