CN106970442B - Phase-shift grating based on tapered optical fiber and manufacturing method thereof - Google Patents
Phase-shift grating based on tapered optical fiber and manufacturing method thereof Download PDFInfo
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- CN106970442B CN106970442B CN201710334994.4A CN201710334994A CN106970442B CN 106970442 B CN106970442 B CN 106970442B CN 201710334994 A CN201710334994 A CN 201710334994A CN 106970442 B CN106970442 B CN 106970442B
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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
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
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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
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
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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
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
- G02B6/02147—Point by point fabrication, i.e. grating elements induced one step at a time along the fibre, e.g. by scanning a laser beam, arc discharge scanning
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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
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
- G02B6/02152—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating involving moving the fibre or a manufacturing element, stretching of the fibre
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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
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention relates to the technical field of optical fiber application, in particular to a method for manufacturing a phase-shift grating based on a tapered optical fiber, which comprises the following steps: tapering and welding the two sections of flattened optical fibers to obtain tapered optical fibers; fixing the tapered optical fiber on a pitching platform on an electric control three-dimensional moving platform, moving the electric control three-dimensional moving platform and carrying out synchronous observation to ensure that the axial direction of the tapered optical fiber is parallel to the horizontal direction, and adjusting the energy density of a light spot of a focused femtosecond laser to a preset size; and moving the position of a light spot of the femtosecond laser to a preset distance away from the left side of the tapered area, moving the light spot of the femtosecond laser to a preset distance away from the upper edge of a fiber core of the tapered fiber, and writing fiber Bragg gratings at two ends of the tapered area according to a preset grating writing method. The phase shift grating based on the tapered fiber manufactured by the technical scheme provided by the invention adopts an all-fiber structure, so that the electromagnetic interference can be avoided. Meanwhile, the structure and the manufacturing process are simple, the reliability is high, and the flexibility is good.
Description
Technical Field
The invention relates to the technical field of optical fiber application, in particular to a tapered optical fiber-based phase-shift grating and a manufacturing method thereof.
Background
Fiber phase shift gratings have wide application in many fields. However, the existing fiber phase shift grating preparation method has many defects. Firstly, the existing preparation technology is basically a grating writing technology based on a phase mask, the phase mask is expensive in manufacturing cost and difficult to maintain, and the investment of a grating preparation system is undoubtedly increased; secondly, the grid period of one phase mask is fixed, so that the wavelength corresponding to the phase shift peak of the phase shift grating cannot be flexibly changed; thirdly, a wide application of the phase shift grating is in tunable devices, most of the phase shift gratings are non-tunable, and the tunable phase shift grating is obtained by destroying the structure of the optical fiber by ablating a circular hole or corroding a channel, and then filling liquid with different refractive indexes to achieve the purpose of tuning, which will destroy the rigidity of the device, easily cause pollution, and has a slow response speed. In summary, the existing fiber phase shift grating basically has one or more of the following disadvantages: the preparation process is complex, the preparation cost is high, the flexibility is poor, the reliability is low, the response speed is slow, and the like.
Disclosure of Invention
Aiming at the problems in the process of preparing the fiber phase shift grating by using the traditional technology, the invention provides the tapered fiber-based phase shift grating which is simple in structure, simple in manufacturing method, good in flexibility, high in reliability and high in response speed.
The invention is realized in such a way, and a method for manufacturing a phase shift grating based on a tapered fiber comprises the following steps:
tapering and welding the two sections of flattened optical fibers according to a preset tapering welding mode to obtain tapered optical fibers with optical fiber tapering areas;
fixing the tapered optical fiber on a pitching platform, fixing the pitching platform on an electric control three-dimensional moving platform, moving the electric control three-dimensional moving platform and synchronously observing through a microscope to enable the axial direction of the tapered optical fiber to be parallel to the horizontal direction, and adjusting the energy density of a light spot of focused femtosecond laser to a preset size by adjusting a laser energy control device;
and moving the position of the light spot of the femtosecond laser to a distance which is equal to the length of the optical fiber Bragg grating to be written and is far away from the left side of the tapered area, moving the light spot of the femtosecond laser to a preset distance which is far away from the upper edge of the fiber core of the tapered optical fiber, writing the optical fiber Bragg grating at two ends of the tapered area according to a preset grating writing method, and monitoring the transmission spectrum in a spectrometer in real time until a preset spectrum is obtained in the grating writing process.
Further, the tapering and welding the two flattened optical fibers according to a preset tapering and welding manner to obtain the optical fiber with the tapering region includes:
cutting the end surfaces of the two optical fibers flat, and aligning the fiber cores of the two cut optical fibers;
selecting a preset welding mode in a welding machine, and adjusting the welding discharge amount, the cone area length, the motor moving speed and the cone drawing time of the welding machine;
and performing discharge fusion to obtain the tapered optical fiber.
Further, the fixing of the tapered optical fiber to the pitching table includes:
fixing the tapered optical fiber on a pitching table by using an optical fiber clamp;
then, moving the electrically-controlled three-dimensional moving platform and synchronously observing through a microscope, so that the axial direction of the tapered optical fiber is parallel to the horizontal direction comprises:
and adjusting the position of the electric control three-dimensional mobile platform to enable the fiber core of the tapered optical fiber to be focused under a high-power objective lens, and adjusting the pitching of the pitching platform to enable the axial direction of the tapered optical fiber to be parallel to the horizontal direction.
Further, the laser energy control device is a combination device of a 1/2 wave plate and a Glan prism.
Further, the preset size of the energy density of the spot of the focused femtosecond laser is specifically as follows:
at a moving speed of 0.01 mm/s to 0.4mm/s, locally uniform laser energy with suitable refractive index intensity modulation can be formed, so that a linear modified region along the radial direction of the tapered optical fiber has a continuous smooth appearance, and the refractive index intensity modulation delta n =10 -4 —10 -2 。
Further, the preset distance between the light spot of the femtosecond laser and the upper edge of the fiber core of the tapered optical fiber is 0-20 microns.
Further, the grating writing method comprises the following steps:
setting the grid spacing of the fiber Bragg grating to be 0.5-20 microns, the grid period number to be 50-3000, the length of a single grating stripe to be 9-40 microns, and the scanning speed to be 0.01-0.4 mm/s;
and controlling a switch of a shutter, driving the electric control three-dimensional mobile platform to enable the faculae of the femtosecond laser to scan line by line along the radial direction of the tapered optical fiber, and respectively writing a section of optical fiber Bragg grating with the same parameter on the left side and the right side of the tapered area.
Further, the writing of a segment of fiber bragg grating with the same parameter on the left side and the right side of the tapered region respectively includes:
adjusting a light spot of femtosecond laser to a position 0.5-3 mm away from the left end of the tapered region, positioning the light spot at a preset position of the upper edge of a fiber core, and scanning the grating period number by a line-by-line scanning method to complete the first fiber Bragg grating writing;
and closing the shutter, moving the electric control three-dimensional moving platform, moving the light spot position of the femtosecond laser to the right end position of the tapered area, controlling the light spot of the femtosecond laser to be a preset distance from the edge of the fiber core of the tapered optical fiber, and scanning the same grating period number as the first fiber Bragg grating by a line-by-line scanning method to complete the second fiber Bragg grating writing.
The embodiment of the invention also provides a tapered fiber-based phase-shift grating, which comprises a fiber tapered region and grating writing regions respectively positioned at two ends of the fiber tapered region;
the grating writing area is provided with a fiber Bragg grating with a preset structure which is directly exposed and written by femtosecond laser with preset wavelength;
the total length of the fiber Bragg grating is 0.5 mm to 5 mm, the period of a single grating is 0.5 micron to 10 microns, and the length of a single grating stripe is 9 microns to 40 microns;
the length of the optical fiber tapering region is 0.05 mm to 2 mm.
Further, the optical fiber tapering region is formed by drawing through an optical fiber fusion splicer or an oxyhydrogen flame tapering machine.
Compared with the prior art, the invention has the beneficial effects that: the phase-shift grating based on the tapered optical fiber prepared by the manufacturing method provided by the embodiment of the invention adopts an all-optical fiber structure, so that the influence of electromagnetic interference on a detection result can be avoided. Meanwhile, the phase-shift grating has the advantages of simple structure, simple manufacturing method, good flexibility, high reliability and high response speed.
Drawings
Fig. 1 is a flowchart of a method for manufacturing a tapered fiber-based phase grating according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of two optical fibers with their end faces to be fusion spliced being cut flat according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating an optical fiber with a tapered region after completion of tapered fusion according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a femtosecond laser micromachining system according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a first fiber bragg grating writing process according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a tapered fiber-based phase-shift grating according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.
According to the tapered fiber-based phase shift grating (hereinafter referred to as tapered phase shift grating), the device is obtained by respectively writing one fiber Bragg grating on two sides of the tapered region of the optical fiber by a femtosecond laser line-by-line method. Fig. 1 shows a method for manufacturing a phase grating based on a tapered fiber, which includes:
s101, performing tapering fusion on the two sections of flattened optical fibers according to a preset tapering fusion mode to obtain the tapered optical fibers with the optical fiber tapering areas. Specifically, the method comprises the following steps: cutting the end surfaces of the two optical fibers flat, and aligning the fiber cores of the two cut optical fibers; and selecting a preset fusion mode in the fusion splicer, adjusting parameters such as fusion discharge amount, taper zone length, motor moving speed, tapering time and the like of the fusion splicer, and then performing discharge fusion splicing to obtain the tapered optical fiber.
S102, fixing the tapered optical fiber on a pitching platform, fixing the pitching platform on an electric control three-dimensional moving platform, moving the electric control three-dimensional moving platform and synchronously observing through a microscope to enable the axial direction of the tapered optical fiber to be parallel to the horizontal direction, and adjusting the energy density of a light spot of focused femtosecond laser to a preset size by adjusting a laser energy control device in a light path through which a light beam of the femtosecond laser passes. Specifically, in this step, the step of fixing the tapered optical fiber to the pitching table includes: fixing the tapered optical fiber on a pitching table by using an optical fiber clamp; then, the moving the electrically controlled three-dimensional moving platform and synchronously observing through a microscope to make the axial direction of the tapered optical fiber parallel to the horizontal direction includes: and adjusting the position of the electric control three-dimensional moving platform to enable the fiber core of the tapered optical fiber to be focused under a high-power objective lens, namely (NA > 1), and adjusting the pitching of the pitching platform to enable the axial direction of the tapered optical fiber to be parallel to the horizontal direction.
S103, moving the position of the light spot of the femtosecond laser to a distance which is equal to the length of the fiber Bragg grating to be written and is away from the left side of the tapered region, moving the light spot of the femtosecond laser to a preset distance away from the upper edge of the fiber core of the tapered fiber, writing the fiber Bragg grating at two ends of the tapered region according to a preset grating writing method, and monitoring the transmission spectrum in a spectrometer in real time in the grating writing process until a preset spectrum is obtained.
Specifically, the laser energy control device is a combination device of a 1/2 wave plate and a Glan prism, or other devices capable of controllably attenuating light energy. The preset size of the energy density of the light spot of the focused femtosecond laser is specifically as follows: at a displacement speed v of 0.01 mm/s to 0.4mm/s (0.01 mm)0.4 mm/s) capable of forming a locally uniform, suitable refractive index intensity modulation Δ n (10) -4 —10 -2 ) The linear modified region along the radial direction of the tapered optical fiber has a continuous and smooth appearance. The preset distance between the facula of the femtosecond laser and the upper edge of the fiber core of the tapered fiber is 0-20 microns.
In this embodiment, the grating writing method includes:
setting the grid spacing of the fiber Bragg grating to be 0.5-20 micrometers, the grid periodicity to be 50-3000, the length of a single grating stripe to be 9-40 micrometers, and the scanning speed to be 0.01-0.4 mm/s; and controlling a switch of a shutter, driving the electric control three-dimensional mobile platform to enable the faculae of the femtosecond laser to scan line by line along the radial direction of the tapered optical fiber, and respectively writing a section of optical fiber Bragg grating with the same parameter on the left side and the right side of the tapered area.
Specifically, the writing of a segment of fiber bragg grating with the same parameter on the left side and the right side of the tapered region respectively includes:
adjusting the light spot of the femtosecond laser to a position 0.5 mm to 3 mm away from the left end of the tapered region (namely the distance of the length of a section of fiber Bragg grating, aiming at ensuring that the section of fiber Bragg grating can be inscribed in the distance), positioning the light spot at a preset position of the upper edge of a fiber core, and scanning the grating period number by a line-by-line scanning method to complete the first fiber Bragg grating inscribing; closing the shutter, moving the electric control three-dimensional moving platform, moving the light spot position of the femtosecond laser to the right end position of the tapered region, controlling the light spot of the femtosecond laser to be a preset distance from the edge of the fiber core of the tapered fiber, and scanning the same grating period number as the first fiber Bragg grating by a line-by-line scanning method to complete the writing of a second fiber Bragg grating.
The embodiments of the present invention are further described below with reference to fig. 2 to 6:
as shown in fig. 2, end faces to be fusion-spliced of two optical fibers are cut flat, and the end faces to be fusion-spliced are put into an optical fiber fusion splicer 3, 1 in fig. 2 representing a cladding portion of the optical fiber, and 2 representing a core portion of the optical fiber. Before welding, a tapering welding mode of a welding machine is selected, the discharge amount is set to be standard-30 bit, the tapering length is set to be 380 mu m, the tapering speed is set to be 40bit, and the discharge time is set to be 1600ms. The fusion splice can then be made by electrical discharge, as shown in FIG. 3, and finally to a fiber containing a taper.
FIG. 4 shows the fiber after tapering being secured to a three-dimensional moving platform by a fiber clamp. In fig. 3, 101 denotes a femtosecond laser, 102 and 104 denote a 1/2 wave plate, respectively, 103 denotes a glan prism, 105 denotes a shutter, 106 denotes a microscope system, 107 denotes a spectrometer, 108 denotes a laser light source, 109 denotes an electrically controlled three-dimensional movable stage, 110 denotes a tapered optical fiber obtained by taper fusion in fig. 3, and 111 and 112 denote double-arm clamps for fixing the optical fiber, respectively. In fig. 4, the microscope system 106 includes a 100 × objective lens and a CCD device capable of communicating with a computer, the electrically controlled three-dimensional movable platform 109 is capable of moving in three-dimensional space, and its level can be adjusted by adjusting knobs, the clamps 111, 112 are fixed on the electrically controlled three-dimensional movable platform 109 by mechanical fixing, and the tapered optical fiber 110 is fixed by the clamps 111, 112. In a specific using process, firstly, observing through the microscope system 106 and enabling the axial direction of the tapered optical fiber 110 to be in a horizontal direction by adjusting the electric control three-dimensional moving platform 109; then, the energy of the laser on the tapered fiber 110 can be adjusted by rotating the first half-wave plate 102, and a more appropriate energy is selected; finally, the exposure or non-exposure of the laser light on the tapered fiber 110 can be controlled by controlling the switch of the shutter 105. The shutter 105 functions to control opening and closing thereof by software to control passage and blocking (non-passage) of an optical path.
Fig. 5 shows a first fiber bragg grating after writing, wherein 501 denotes a cladding portion of the optical fiber, 502 denotes a core of the optical fiber, and 503 denotes grating stripes. In the system shown in fig. 4, the laser spot is located 5 μm above the upper edge of the fiber core of the grating writing area 1.07mm away from the left end of the fiber tapering area by adjusting the electrically controlled three-dimensional moving platform and the shutter. Then setting the parameters of the fiber Bragg grating, including: the grating interval of the fiber Bragg grating is 2.141 mu m, the grating period number is 500, the length of a single grating is 20 mu m, the scanning speed is 0.15 mu m/s, a line-by-line method grating writing program is started after a shutter is opened, laser spots are exposed on a grating writing area and are scanned line by line along the radial direction of the fiber, and the laser spots move to the right side of the fiber axis for a period of distance after one stripe is written. As mentioned above, when the program is executed, the first fiber bragg grating is written immediately, and the spectrum of the single fiber bragg grating can be observed on the spectrometer.
Fig. 6 shows two fiber bragg gratings after writing, and the structure is finally a tapered fiber-based phase shift grating according to an embodiment of the present invention. In fig. 5, the light spot position is located at the left end of the tapered optical fiber, and at this time, the light spot position is moved to the right side of the tapered optical fiber by controlling the electrically controlled three-dimensional moving platform, and then the process of writing the fiber bragg grating is performed. When the program is complete, the second grating is also written, and the final phase-shifted grating spectrum is observed on the spectrometer.
In the process of writing the grating, a spectrometer is used for monitoring a transmission spectrum in real time, when the first section of fiber Bragg grating is written, a Bragg resonance peak near the corresponding wavelength can be observed, and the depth of the resonance peak is continuously deepened along with the increase of the number of grating periods;
when writing the second fiber Bragg grating, the first grating resonance peak is observed to split, and the transmissivity at a certain wavelength in the middle of the first grating resonance peak is increased continuously to form a phase-shift grating spectrum.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (10)
1. A method for manufacturing a phase shift grating based on a tapered fiber is characterized by comprising the following steps:
tapering and welding the two sections of flattened optical fibers according to a preset tapering welding mode to obtain tapered optical fibers with optical fiber tapering areas;
fixing the tapered optical fiber on a pitching platform, fixing the pitching platform on an electric control three-dimensional moving platform, moving the electric control three-dimensional moving platform and carrying out synchronous observation through a microscope, so that the axial direction of the tapered optical fiber is parallel to the horizontal direction, and adjusting the energy density of a light spot of focused femtosecond laser to a preset size by adjusting a laser energy control device;
and moving the position of the light spot of the femtosecond laser to a distance which is equal to the length of the optical fiber Bragg grating to be written and is far away from the left side of the tapered area, moving the light spot of the femtosecond laser to a preset distance which is far away from the upper edge of the fiber core of the tapered optical fiber, writing the optical fiber Bragg grating at two ends of the tapered area according to a preset grating writing method, and monitoring the transmission spectrum in a spectrometer in real time until a preset spectrum is obtained in the grating writing process.
2. The method of claim 1, wherein said taper welding two lengths of flattened optical fiber according to a pre-taper welding method to obtain an optical fiber having a tapered region comprises:
cutting the end surfaces of the two optical fibers flat, and aligning the fiber cores of the two cut optical fibers;
selecting a preset welding mode in a welding machine, and adjusting the welding discharge amount, the cone area length, the motor moving speed and the cone drawing time of the welding machine;
and performing discharge fusion welding to obtain the tapered optical fiber.
3. The method of claim 1, wherein securing the tapered optical fiber to the pitch stage comprises:
fixing the tapered optical fiber on a pitching table by using an optical fiber clamp;
then, the moving the electrically controlled three-dimensional moving platform and synchronously observing through a microscope to make the axial direction of the tapered optical fiber parallel to the horizontal direction includes:
and adjusting the position of the electric control three-dimensional mobile platform to focus the fiber core of the tapered optical fiber under a high-power objective lens, and adjusting the pitching of the pitching platform to enable the axial direction of the tapered optical fiber to be parallel to the horizontal direction.
4. The method of claim 1, wherein the laser energy control device is a combination of a 1/2 wave plate and a glan prism.
5. The method according to claim 1, wherein the preset size of the energy density of the spot of the focused femtosecond laser is specifically:
at a moving speed of 0.01 mm/s to 0.4mm/s, locally uniform laser energy with suitable refractive index intensity modulation can be formed, so that a linear modified region along the radial direction of the tapered optical fiber has a continuous smooth appearance, and the refractive index intensity modulation delta n =10 -4 —10 -2 。
6. The method of claim 1, wherein the femtosecond laser has a predetermined distance from the upper edge of the core of the tapered fiber to the spot of the femtosecond laser, which is 0 to 20 μm.
7. The method of manufacturing of claim 1, wherein the raster writing method comprises:
setting the grid spacing of the fiber Bragg grating to be 0.5-20 microns, the grid period number to be 50-3000, the length of a single grating stripe to be 9-40 microns, and the scanning speed to be 0.01-0.4 mm/s;
and controlling a switch of a shutter, driving the electric control three-dimensional mobile platform to enable the faculae of the femtosecond laser to scan line by line along the radial direction of the tapered optical fiber, and respectively writing a section of optical fiber Bragg grating with the same parameter on the left side and the right side of the tapered area.
8. The method according to claim 7, wherein said writing a segment of fiber bragg grating with the same parameters on the left and right sides of the tapered region respectively comprises:
adjusting the light spot of the femtosecond laser to a position 0.5-3 mm away from the left end of the tapering region, positioning the light spot at a preset position of the upper edge of the fiber core, and scanning the grating period number by a line-by-line scanning method to complete the first fiber Bragg grating writing;
closing the shutter, moving the electric control three-dimensional moving platform, moving the light spot position of the femtosecond laser to the right end position of the tapered region, controlling the light spot of the femtosecond laser to be a preset distance from the edge of the fiber core of the tapered fiber, and scanning the same grating period number as the first fiber Bragg grating by a line-by-line scanning method to complete the writing of a second fiber Bragg grating.
9. A tapered fiber-based phase shift grating, wherein the phase shift grating is manufactured by the manufacturing method according to any one of claims 1 to 8, and the phase shift grating comprises a fiber tapered region and grating writing regions respectively located at two ends of the fiber tapered region;
the grating writing area is provided with a fiber Bragg grating with a preset structure which is directly exposed and written by femtosecond laser with preset wavelength;
the total length of the fiber Bragg grating is 0.5 mm to 5 mm, the period of a single grating is 0.5 micron to 10 microns, and the length of a single grating stripe is 9 microns to 40 microns;
the length of the optical fiber tapering region is 0.05 mm to 2 mm.
10. The phase shift grating of claim 9, wherein the fiber-tapering region is drawn by an optical fiber fusion splicer or an oxyhydrogen flame-tapering machine.
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| CN107608022B (en) * | 2017-10-26 | 2023-09-26 | 深圳大学 | Preparation system and preparation method of micro-nano fiber Bragg grating |
| CN110690639B (en) * | 2018-07-05 | 2020-12-01 | 北京交通大学 | High efficiency injection locked fiber taper laser |
| WO2020140253A1 (en) * | 2019-01-04 | 2020-07-09 | 深圳大学 | Parallel fiber bragg grating having low polarization-dependent loss, and preparation method and apparatus thereof |
| CN112558330A (en) * | 2020-12-11 | 2021-03-26 | 北京交通大学 | Optical modulator based on graphene oxide film phase shift fiber grating |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6108469A (en) * | 1998-11-30 | 2000-08-22 | Lucent Technologies Inc | Wavelength selective resonant gratings |
| US6658182B1 (en) * | 1999-06-29 | 2003-12-02 | Itf Technologies Optiques Inc. | Temperature stabilization of tapered fiber optic components |
| CN1543024A (en) * | 2003-11-06 | 2004-11-03 | 中国科学院长春光学精密机械与物理研 | High power, narrow linewidth double-cladding fiber laser and making method |
| CN102540322A (en) * | 2011-12-30 | 2012-07-04 | 暨南大学 | Micro-nano fiber grating laser writing method and device |
| CN104154883A (en) * | 2014-07-23 | 2014-11-19 | 中国计量学院 | Inclination angle measuring sensor based on fused biconical taper structure of inclined fiber bragg grating |
| CN105988153A (en) * | 2016-06-27 | 2016-10-05 | 濮阳光电产业技术研究院 | Device and method of fabricating apodization phase shift grating on tapered fiber |
| CN207051524U (en) * | 2017-05-12 | 2018-02-27 | 深圳大学 | Phase-shifted grating based on tapered fiber |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6089077B1 (en) * | 2015-08-25 | 2017-03-01 | 沖電気工業株式会社 | Waveguide type optical diffraction grating and optical wavelength filter |
-
2017
- 2017-05-12 CN CN201710334994.4A patent/CN106970442B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6108469A (en) * | 1998-11-30 | 2000-08-22 | Lucent Technologies Inc | Wavelength selective resonant gratings |
| US6658182B1 (en) * | 1999-06-29 | 2003-12-02 | Itf Technologies Optiques Inc. | Temperature stabilization of tapered fiber optic components |
| CN1543024A (en) * | 2003-11-06 | 2004-11-03 | 中国科学院长春光学精密机械与物理研 | High power, narrow linewidth double-cladding fiber laser and making method |
| CN102540322A (en) * | 2011-12-30 | 2012-07-04 | 暨南大学 | Micro-nano fiber grating laser writing method and device |
| CN104154883A (en) * | 2014-07-23 | 2014-11-19 | 中国计量学院 | Inclination angle measuring sensor based on fused biconical taper structure of inclined fiber bragg grating |
| CN105988153A (en) * | 2016-06-27 | 2016-10-05 | 濮阳光电产业技术研究院 | Device and method of fabricating apodization phase shift grating on tapered fiber |
| CN207051524U (en) * | 2017-05-12 | 2018-02-27 | 深圳大学 | Phase-shifted grating based on tapered fiber |
Non-Patent Citations (2)
| Title |
|---|
| High sensitivity refractive index sensor based on adiabatic tapered optical fiber deposited with nanofilm by ALD;Shan Zhu, Fufei Pang,Sujuan Huang.et.al;《OPTICS EXPRESS》;20150518;第23卷(第11期);全文 * |
| 拉锥型啁啾光纤光栅滤波器的研究;尹彬，柏云龙.et.al;《物理学报》;20131231;第62卷(第21期);正文第2小节 * |
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