CN113311525A - Phase-shift fiber Bragg grating preparation method based on femtosecond laser direct writing system - Google Patents
Phase-shift fiber Bragg grating preparation method based on femtosecond laser direct writing system Download PDFInfo
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- CN113311525A CN113311525A CN202110533124.6A CN202110533124A CN113311525A CN 113311525 A CN113311525 A CN 113311525A CN 202110533124 A CN202110533124 A CN 202110533124A CN 113311525 A CN113311525 A CN 113311525A
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- 239000013307 optical fiber Substances 0.000 claims abstract description 70
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims description 10
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- G02B5/18—Diffraction gratings
- G02B5/1847—Manufacturing methods
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1847—Manufacturing methods
- G02B5/1857—Manufacturing methods using exposure or etching means, e.g. holography, photolithography, exposure to electron or ion beams
Abstract
The invention discloses a phase shift fiber Bragg grating preparation method based on a femtosecond laser direct writing system, wherein the femtosecond laser direct writing system comprises the following steps: the device comprises a three-dimensional motion platform, a rotary fixture, a processor, a femtosecond laser and a microscope objective, wherein the preparation method comprises the following steps: the rotary fixture twists the optical fiber to be processed according to the preset twisting rate; the three-dimensional motion platform drives the optical fiber to be processed to move according to the motion data; the femtosecond laser generates femtosecond pulse laser and controls the laser to be emitted according to shutter data, the laser is focused on an optical fiber to be processed through a microscope objective, and the Bragg grating is engraved by matching with the movement of the optical fiber; releasing the optical fiber from the rotary fixture after the writing so as to deflect the Bragg grating to form a phase-shift optical fiber Bragg grating; the phase-shift fiber Bragg grating can be prepared in one step without preparing a finished product of the fiber Bragg grating; and the process is simple, and the preparation efficiency and the flexibility of the manufacturing process of the phase-shift fiber Bragg grating are improved.
Description
Technical Field
The invention relates to the technical field of optical fiber processing, in particular to a phase-shift fiber Bragg grating preparation method based on a femtosecond laser direct writing system.
Background
In the related art, when a phase-shift fiber bragg grating is prepared, a special phase-shift phase mask plate is mostly utilized to be directly written in through ultraviolet laser exposure, or a piezoelectric transducer with nanometer precision is used for moving the phase mask plate or an optical fiber to accurately control displacement during writing; or, post-processing the fiber Bragg grating with uniform period to generate the phase-shift fiber Bragg grating. However, the method of ultraviolet laser exposure has special requirements on the photosensitivity of the optical fiber, and is only suitable for the germanium-doped quartz optical fiber with ultraviolet photosensitivity or subjected to sensitization treatment; the method of directly writing the special phase shift phase mask plate through ultraviolet laser exposure needs a large number of mask plates to prepare gratings with different resonant wavelengths, and has poor flexibility and extremely high cost; the method for preparing the phase-shift fiber bragg grating by adopting post-treatment is mostly a two-step processing preparation method, a finished product of the fiber bragg grating is required to be provided in the preparation process, the grating region and the position to be processed are required to be accurately positioned so as to ensure that the phase-shift region is positioned in the middle of the grating region, the process is complex, the efficiency is low, and the preparation cost is high.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, one purpose of the invention is to provide a method for preparing a phase-shift fiber bragg grating based on a femtosecond laser direct writing system, which can prepare the phase-shift fiber bragg grating in one step without preparing a finished fiber bragg grating, has no requirement on the photosensitivity of an optical fiber to be processed, does not need sensitization treatment, and is suitable for optical fibers made of various materials; moreover, the process is simple, and the preparation efficiency of the phase-shift fiber Bragg grating is improved; meanwhile, the flexibility of the manufacturing process is improved.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for preparing a phase-shift fiber bragg grating based on a femtosecond laser direct writing system, where the femtosecond laser direct writing system includes: the manufacturing method comprises the following steps of: clamping the optical fiber to be processed through the rotary clamp so that the rotary clamp can twist the optical fiber to be processed according to a preset twisting rate; generating, by the processor, motion data of the three-dimensional motion stage and shutter control data of the femtosecond laser, and transmitting the motion data to the three-dimensional motion stage and the shutter control data to the femtosecond laser; the three-dimensional motion platform moves according to the motion data so as to drive the optical fiber to be processed fixed on the three-dimensional motion platform through the rotary clamp to move; the femtosecond laser controls laser emission according to the shutter control data, and focuses the emitted laser on an optical fiber to be processed through the microscope objective so as to generate a Bragg grating; and releasing the optical fiber to be processed from the rotary clamp so as to deflect the Bragg grating to form the phase-shift fiber Bragg grating.
According to the phase shift fiber Bragg grating preparation method based on the femtosecond laser direct writing system, the femtosecond laser direct writing system comprises the following steps: the manufacturing method comprises the following steps of: the optical fiber to be processed is clamped by the rotary clamp, so that the optical fiber to be processed is twisted by the rotary clamp according to the preset torsion rate, and the phase-shift fiber Bragg gratings with different transmission peak numbers or transmission depths can be prepared by changing the torsion rate, so that the flexibility of the preparation process is improved; generating, by the processor, motion data of the three-dimensional motion stage and shutter control data of the femtosecond laser, and transmitting the motion data to the three-dimensional motion stage and the shutter control data to the femtosecond laser, so that phase-shifted fiber bragg gratings with different resonant wavelengths can be obtained by changing the motion data (e.g., motion trajectory, motion speed, etc.) of the three-dimensional motion stage, thereby further improving flexibility of a manufacturing process; the three-dimensional motion platform moves according to the motion data so as to drive the optical fiber to be processed fixed on the three-dimensional motion platform through the rotary clamp to move; the femtosecond laser controls laser emission according to the shutter control data, and focuses the emitted laser on an optical fiber to be processed through the microscope objective so as to generate a Bragg grating; releasing the optical fiber to be processed from the rotary clamp so as to deflect the Bragg grating to form a phase-shift fiber Bragg grating; therefore, the phase-shift fiber Bragg grating can be prepared in one step without preparing a finished product of the fiber Bragg grating; moreover, the process is simple, and the preparation efficiency of the phase-shift fiber Bragg grating is improved; meanwhile, the flexibility of the manufacturing process is improved.
In addition, the method for preparing the phase-shifted fiber bragg grating based on the femtosecond laser direct writing system according to the embodiment of the invention may further have the following additional technical features:
optionally, the femtosecond laser direct writing system further comprises: the optical fiber processing device comprises a glass slide and a cover glass, wherein before the optical fiber to be processed is clamped by the rotary clamp, the optical fiber processing device further comprises: and placing the optical fiber to be processed on a glass slide, twisting the optical fiber to be processed according to a preset twisting rate by using the rotary clamp, adding a refractive index matching fluid into the area to be processed, and covering the glass slide after the refractive index matching fluid is added.
Optionally, the repetition frequency of the femtosecond laser is adjustable, and the tuning range is more than or equal to 10 Hz-1 MHz.
Optionally, the movement speed of the three-dimensional movement platform is matched with the repetition frequency of the femtosecond laser, and the three-dimensional movement platform is suitable for manufacturing phase-shift fiber bragg gratings with different periods and different orders.
Optionally, the movement speed of the three-dimensional movement platform is matched with the repetition frequency of the femtosecond laser, and the fiber bragg grating can be manufactured in a plurality of modes of point-by-point writing or line-by-line writing.
Drawings
FIG. 1 is a schematic structural diagram of a femtosecond laser-based direct writing system according to an embodiment of the invention;
FIG. 2 is a schematic flow chart of a method for fabricating a phase-shifted fiber Bragg grating based on a femtosecond laser direct writing system according to an embodiment of the invention;
FIG. 3 is a graph of transmission spectra according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the related art, for the preparation of the phase-shift fiber bragg grating, a finished fiber bragg grating is often required to be provided, the process is complex, the efficiency is low, and the preparation cost is high; the mode of directly writing in the special phase shift phase mask plate through ultraviolet laser exposure needs a large number of mask plates to prepare gratings with different resonant wavelengths, so that the flexibility is poor, and the photosensitivity of the optical fiber to be processed has special requirements. According to the phase shift fiber Bragg grating preparation method based on the femtosecond laser direct writing system, the femtosecond laser direct writing system comprises the following steps: the manufacturing method comprises the following steps of: the optical fiber to be processed is clamped by the rotary clamp, so that the optical fiber to be processed is twisted by the rotary clamp according to the preset torsion rate, and the phase-shift fiber Bragg gratings with different transmission peak numbers or transmission depths can be prepared by changing the torsion rate, so that the flexibility of the preparation process is improved; generating, by the processor, motion data of the three-dimensional motion stage and shutter control data of the femtosecond laser, and transmitting the motion data to the three-dimensional motion stage and the shutter control data to the femtosecond laser, so that phase-shifted fiber bragg gratings with different resonant wavelengths can be obtained by changing the motion data (e.g., motion trajectory, motion speed, etc.) of the three-dimensional motion stage, thereby further improving flexibility of a manufacturing process; the three-dimensional motion platform moves according to the motion data so as to drive the optical fiber to be processed fixed on the three-dimensional motion platform through the rotary clamp to move; the femtosecond laser controls laser emission according to the shutter control data, and focuses the emitted laser on an optical fiber to be processed through the microscope objective so as to generate a Bragg grating; releasing the optical fiber to be processed from the rotary clamp so as to deflect the Bragg grating to form a phase-shift fiber Bragg grating; the phase-shift fiber Bragg grating is prepared in one step without preparing a finished product of the fiber Bragg grating, the photosensitivity of the optical fiber to be processed is not required, and the sensitivity enhancement treatment is not required, so that the phase-shift fiber Bragg grating is suitable for optical fibers made of various materials; moreover, the process is simple, and the preparation efficiency of the phase-shift fiber Bragg grating is improved; meanwhile, the flexibility of the manufacturing process is improved.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Fig. 1 is a schematic structural diagram of a femtosecond laser direct writing system according to an embodiment of the present invention, as shown in fig. 1, the femtosecond laser direct writing system includes: the three-dimensional motion platform 10, the rotating fixture 20, the processor 30, the femtosecond laser 40 and the microscope objective 50 are respectively connected with the processor 30, and the processor 30 controls the motion process of the three-dimensional motion platform 10, the torsion rate of the rotating fixture 20 and the scanning process of the femtosecond laser 40 through the connection among the devices.
Fig. 2 is a schematic flowchart of a method for manufacturing a phase-shifted fiber bragg grating based on a femtosecond laser direct writing system according to an embodiment of the present invention, where as shown in fig. 2, the method includes the following steps:
s101, clamping the optical fiber to be processed through the rotating clamp 20, so that the rotating clamp 20 twists the optical fiber to be processed according to a preset twisting rate.
That is, the optical fiber to be processed is clamped by the rotating clamp 20, so that when the rotating clamp 20 rotates according to the preset torsion rate, the optical fiber to be processed clamped by the rotating clamp can be twisted to different degrees; furthermore, phase-shifted fiber bragg gratings with different transmission peak numbers and different transmission depths can be prepared according to different preset torsion rates; that is, it is only necessary to adjust the preset torsion ratio subsequently to determine what kind of phase shift fiber bragg grating is to be prepared, thereby improving the flexibility of the preparation process.
S102, generating motion data of the three-dimensional moving stage 10 and shutter control data of the femtosecond laser 40 by the processor 30, and transmitting the motion data to the three-dimensional moving stage 10 and the shutter control data to the femtosecond laser 40.
That is to say, after determining the final phase-shifted fiber bragg grating corresponding to the optical fiber to be processed, the user inputs the parameters corresponding to the final phase-shifted fiber bragg grating into the processor 30, and the processor 30 performs calculation according to the input parameters to generate motion data (for example, a motion track and a motion speed) corresponding to the three-dimensional motion platform 10; and shutter control data of the femtosecond laser 40, and transmits the motion data to the three-dimensional motion stage 10 and the shutter control data to the femtosecond laser 40; so that the three-dimensional moving stage 10 moves according to the motion data, and the femtosecond laser 40 controls laser emission according to the shutter control data.
And S103, the three-dimensional motion platform 10 moves according to the motion data so as to drive the optical fiber to be processed, which is fixed on the three-dimensional motion platform through the rotating clamp 20, to move.
And S104, the femtosecond laser 40 controls laser emission according to the shutter control data, and focuses the emitted laser on the optical fiber to be processed through the microscope objective 50 to generate the Bragg grating.
That is, while the three-dimensional motion stage 10 moves according to the motion data, the femtosecond laser 40 controls laser emission according to the shutter control data, and focuses the emitted laser onto the optical fiber to be processed through the microscope objective 50; thus, when the three-dimensional motion stage 10 finishes operating according to the motion data, the bragg grating can be formed on the optical fiber to be processed.
And S105, releasing the optical fiber to be processed from the rotary clamp 20 so as to deflect the Bragg grating and form the phase-shift fiber Bragg grating.
That is, after the bragg grating is formed on the optical fiber to be processed, the optical fiber to be processed is released by controlling the rotating jig 20, and the bragg grating is slightly deflected due to the release of the torsion, so that the phase-shifted fiber bragg grating is formed.
For better illustration, fig. 3 is taken as an example, and fig. 3 is a transmission spectrum of an embodiment of the invention.
In some embodiments, the femtosecond laser direct writing system further comprises: a glass slide and a cover glass (not shown), wherein before the optical fiber to be processed is clamped by the rotary clamp, the method further comprises the following steps: and placing the optical fiber to be processed on a glass slide, twisting the optical fiber to be processed according to a preset twisting rate by using a rotating clamp, adding a refractive index matching fluid into the area to be processed, and covering a cover glass after the refractive index matching fluid is added.
That is, by adding the refractive index matching fluid, the laser light can be prevented from being deflected through the surface of the optical fiber.
The grating can be written in optical fibers to be processed of various materials and structures by utilizing the multi-photon effect of femtosecond laser and optical fiber materials without special requirements on the photosensitivity of the optical fibers, and the grating area has high manufacturing efficiency and good grating forming quality and can endure the high temperature close to 1000 ℃. Meanwhile, a coating layer does not need to be removed, the mechanical strength of the optical fiber to be processed is kept to the maximum extent, an expensive mask is not needed, and a complex optical path does not need to be built.
As a preferred implementation mode, the repetition frequency of the femtosecond laser is adjustable, and the tuning range is more than or equal to 10 Hz-1 MHz.
As another preferred implementation mode, the motion speed of the three-dimensional motion platform is matched with the repetition frequency of the femtosecond laser, and the three-dimensional motion platform is suitable for manufacturing phase-shift fiber Bragg gratings with different periods and different orders.
As another preferred embodiment, the moving speed of the three-dimensional moving platform is matched with the repetition frequency of the femtosecond laser, and the fiber bragg grating can be manufactured in a plurality of ways of point-by-point writing or line-by-line writing.
In summary, according to the method for preparing the phase-shift fiber bragg grating based on the femtosecond laser direct writing system in the embodiment of the present invention, the femtosecond laser direct writing system includes: the manufacturing method comprises the following steps of: the optical fiber to be processed is clamped by the rotary clamp, so that the optical fiber to be processed is twisted by the rotary clamp according to the preset torsion rate, and the phase-shift fiber Bragg gratings with different transmission peak numbers or transmission depths can be prepared by changing the torsion rate, so that the flexibility of the preparation process is improved; generating, by the processor, motion data of the three-dimensional motion stage and shutter control data of the femtosecond laser, and transmitting the motion data to the three-dimensional motion stage and the shutter control data to the femtosecond laser, so that phase-shifted fiber bragg gratings with different resonant wavelengths can be obtained by changing the motion data (e.g., motion trajectory, motion speed, etc.) of the three-dimensional motion stage, thereby further improving flexibility of a manufacturing process; the three-dimensional motion platform moves according to the motion data so as to drive the optical fiber to be processed fixed on the three-dimensional motion platform through the rotary clamp to move; the femtosecond laser controls laser emission according to the shutter control data, and focuses the emitted laser on an optical fiber to be processed through the microscope objective so as to generate a Bragg grating; releasing the optical fiber to be processed from the rotary clamp so as to deflect the Bragg grating to form a phase-shift fiber Bragg grating; therefore, the phase-shift fiber Bragg grating can be prepared in one step without preparing a finished product of the fiber Bragg grating; moreover, the process is simple, and the preparation efficiency of the phase-shift fiber Bragg grating is improved; meanwhile, the flexibility of the manufacturing process is improved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (5)
1. A phase shift fiber Bragg grating preparation method based on a femtosecond laser direct writing system is characterized in that the femtosecond laser direct writing system comprises: the manufacturing method comprises the following steps of:
clamping the optical fiber to be processed through the rotary clamp so that the rotary clamp can twist the optical fiber to be processed according to a preset twisting rate;
generating, by the processor, motion data of the three-dimensional motion stage and shutter control data of the femtosecond laser, and transmitting the motion data to the three-dimensional motion stage and the shutter control data to the femtosecond laser;
the three-dimensional motion platform moves according to the motion data so as to drive the optical fiber to be processed fixed on the three-dimensional motion platform through the rotary clamp to move;
the femtosecond laser generates femtosecond pulse laser, controls laser emission according to the shutter control data, and focuses the emitted laser on a moving optical fiber to be processed through the microscope objective so as to generate a Bragg grating;
and releasing the optical fiber to be processed from the rotary clamp so as to deflect the Bragg grating to form the phase-shift fiber Bragg grating.
2. The femtosecond laser direct writing system-based phase-shift fiber bragg grating preparation method according to claim 1, wherein the femtosecond laser direct writing system further comprises: the optical fiber processing device comprises a glass slide and a cover glass, wherein before the optical fiber to be processed is clamped by the rotary clamp, the optical fiber processing device further comprises: and placing the optical fiber to be processed on a glass slide, twisting the optical fiber to be processed according to a preset twisting rate by using the rotary clamp, adding a refractive index matching fluid into the area to be processed, and covering the glass slide after the refractive index matching fluid is added.
3. The method for preparing the phase-shift fiber Bragg grating based on the femtosecond laser direct writing system according to claim 1, wherein the repetition frequency of the femtosecond laser is adjustable, and the tuning range is more than or equal to 10 Hz-1 MHz.
4. The femtosecond laser direct writing system-based phase-shift fiber Bragg grating preparation method according to claim 1, wherein the movement speed of the three-dimensional movement platform is matched with the repetition frequency of the femtosecond laser, and the method is suitable for manufacturing phase-shift fiber Bragg gratings with different periods and different orders.
5. The femtosecond laser direct writing system-based phase-shift fiber Bragg grating preparation method according to claim 4, wherein the movement speed of the three-dimensional movement platform is matched with the repetition frequency of the femtosecond laser, and the fiber Bragg grating can be prepared in a plurality of ways of point-by-point writing or line-by-line writing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114518620A (en) * | 2022-01-24 | 2022-05-20 | 江苏睿赛光电科技有限公司 | High-power fiber grating laser annealing system and method |
| CN114660705A (en) * | 2022-03-24 | 2022-06-24 | 西北大学 | Method for writing fiber Bragg grating one by one based on high-refractive-index matching fluid |
| CN115327694A (en) * | 2022-03-31 | 2022-11-11 | 西北工业大学 | Clamping device for multi-core fiber Bragg grating laser direct writing |
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| CN115327694A (en) * | 2022-03-31 | 2022-11-11 | 西北工业大学 | Clamping device for multi-core fiber Bragg grating laser direct writing |
| CN115327694B (en) * | 2022-03-31 | 2024-03-15 | 西北工业大学 | Clamping device for multi-core fiber Bragg grating laser direct writing |
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