CN108572420A - Bidirectional optical fiber end cap with laser beam expanding output and reflection functions and application thereof - Google Patents
Bidirectional optical fiber end cap with laser beam expanding output and reflection functions and application thereof Download PDFInfo
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- CN108572420A CN108572420A CN201810801530.4A CN201810801530A CN108572420A CN 108572420 A CN108572420 A CN 108572420A CN 201810801530 A CN201810801530 A CN 201810801530A CN 108572420 A CN108572420 A CN 108572420A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 112
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 19
- 239000010453 quartz Substances 0.000 claims abstract description 82
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000000835 fiber Substances 0.000 claims abstract description 61
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000003287 optical effect Effects 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 12
- 238000005253 cladding Methods 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 5
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 4
- 241000931526 Acer campestre Species 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims 1
- 238000002310 reflectometry Methods 0.000 description 9
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000007747 plating Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 206010003084 Areflexia Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
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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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0905—Dividing and/or superposing multiple light beams
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/0994—Fibers, light pipes
-
- 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
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
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- Optical Couplings Of Light Guides (AREA)
Abstract
A bidirectional optical fiber end cap with laser expanded beam output and reflection functions comprises an optical fiber (11) and a quartz block (12); the quartz block (12) is an integrated structure formed by sequentially connecting a circular table (18) with the same end face size, a column body (19) and an output curved surface body (14); one end face of the optical fiber (11) is welded with the smaller end face of the circular table (18) to form an interface (13); the extension line of the central line of the fiber core of the optical fiber (11) is the central line of the circular truncated cone (18), the cylinder (19) and the output curved surface body (14); the curved surface of the output curved surface body (14) takes the intersection point of the extension line of the center of the fiber core of the optical fiber (11) and the interface (13) as the spherical center, the sum of the lengths of the central line of the quartz block (12) in the circular truncated cone (18), the cylinder (19) and the output curved surface body (14) is taken as the curvature radius, and the curved surface is plated with a film layer with certain reflection/transmissivity.
Description
Technical field
The present invention relates generally to optical-fiber laser field, and in particular to a kind of to have both laser beam expanding output and reflection function
Bidirectional optical fiber end cap.
Background technology
High-capacity optical fiber laser has a wide range of applications in fields such as laser cutting, laser melting coating, 3D printings.In recent years
Come, with the power ascension of doubly clad optical fiber manufacture craft and high brightness semiconductor laser, single channel high power optical fibre laser is defeated
Go out power and obtained development at full speed, current 10 kilowatts are increased to from 100 watts at the beginning of 21 century.With optical-fiber laser output work
The continuous improvement of rate, the power density in fiber core are also constantly soaring therewith.And since the output end face of optical fiber is cutting, is grinding
During the processing such as mill, polishing, inevitably defect and damage are left in the end face of optical fiber so that internal field adds
By force, material damage is caused, so in large-power optical fiber laser system, optical fiber output end face processing is an important core skill
Art.End caps are exactly to realize the high-power fiber passive device of optical fiber end surface protective, by expanding reduction to output beam
The optical power density of output end, to protect fiber end face without damage.
Traditional end caps are mainly used for independent output or the independent input of optical-fiber laser.Currently, in optical fiber laser
Field using it is more be the end caps with light beam output function, by by the quartz wedge welding of energy-transmission optic fibre and taper,
Have the function that beam expander and protection output end face；This kind of end caps need to plate anti-reflection film in end face, strictly to prevent
Laser caused by Laser feedback damages, therefore only has laser output function.In fiber coupled laser diode field,
In order to realize pluggable optical fiber pigtail, using it is more be the end caps with laser coupled function, by space input
Laser is coupled to by conical fiber end cap in energy-transmission optic fibre fibre core；This kind of end caps are also required to plate anti-reflection film in end face,
Ensure laser coupling efficiency, avoids fuel factor caused by laser power loss and optical fiber damage.
Presently, it is expanded in the conventional application such as input coupling in general output, it is higher to require that end caps have
Power penetrates efficiency, while avoiding the feedback that system may be caused unstable.Therefore, to there is no one kind that can be provided simultaneously at present defeated
Go out the bidirectional optical fiber end cap with reflection function.
Invention content
For the deficiency of above-mentioned prior art, the present invention provides a kind of pairs having both laser beam expanding output and reflection function
To end caps, can couple in fiber core laser reflection to while realizing that laser output expands.
The technical scheme is that：A kind of bidirectional optical fiber end cap having both laser beam expanding output and reflection function, it is special
Sign is, it includes optical fiber and the quartz wedge that is connect with optical fiber；The quartz wedge is the identical round platform of connecting end surface size, cylinder
The integral structure being connected in sequence with output curved body；The small end face of one end face of the optical fiber and the round platform of quartz wedge
Welding forms interface；Round platform and cylinder and output curved body center of the core centre line extended line of the optical fiber for quartz wedge
Line；The curved surface of the output curved body of quartz wedge is using the core centre extended line of optical fiber and the intersection point at interface as the centre of sphere, with quartz wedge
Length the sum of of the center line in round platform and cylinder and output curved body is radius of curvature, to ensure that the light beam of camber reflection can
It is efficiently entering in fiber core；It is coated on the curved surface of the output curved body of quartz wedge and is matched with optical maser wavelength, there is predetermined laser
The film layer of reflection/transmission rate ratio, so that the laser reflectivity of the film layer is between 0%~100%, laser transmissivity exists
Between 100%~0%, realize that different output and echo power ratio, laser enter quartz wedge through the fiber core from interface
In, laser facula is transmitted and is expanded in quartz wedge, and the laser beam after expanding is defeated by the curved end of the output curved body of quartz wedge
Go out and reflects.
Further, above-mentioned optical fiber be for laser generate and transmit optical fiber, for mix rare earth ion gain fibre or
The energy-transmission optic fibre of rare earth ion is not mixed；And optical fiber of the cross-sectional structure of optical fiber selected from single covering, double clad and triple clad structure
One kind in cross-sectional structure.
Further, the core diameter of above-mentioned optical fiber is in 10~200 micron ranges, when the cross-sectional structure of optical fiber is
When double-clad structure, inner cladding diameter is between 100~1000 microns；Outer cladding diameter is between 250~2000 microns.
Further, the small end face size of the round platform of above-mentioned quartz wedge is 2~5 times of the diameter of the outermost covering of optical fiber.
Further, the interface of above-mentioned optical fiber and quartz wedge welding is smooth flat, the smooth flat and optical fiber, quartz wedge
Length direction and laser transmission direction it is vertical.Further, machinery aid of the cylinder of above-mentioned quartz wedge for end caps
And fixation, diameter is between 3~500 millimeters, and between 10~100 millimeters, length expands length according to light beam needs
Size design, ensure laser while transmit in end cap realization laser expands.
Further, the cylinder is cylinder.
The present invention also provides the above-mentioned bidirectional optical fiber end caps for having both laser beam expanding output and reflection function in single-ended pumping
Application in full optical fiber laser oscillator or both-end pumping full optical fiber laser oscillator.To two-way end cap plating total reflection film, constitute
End caps are totally reflected, for substituting the high reflection grating in conventional all-optical fibre oscillator；Two-way end cap plating 10% is reflected,
90% transmission film composition part transmits end caps, for substituting the low reflection coupling output light in conventional all-optical fibre oscillator
Grid.It is totally reflected end caps and part mirror based fiber optica end cap constitutes the feedback cavity of optical fiber laser, in conjunction with pumping source and gain light
The oscillator output of all -fiber may be implemented in fibre.Since end caps bear power height, total reflection end caps and part are utilized
The full optical fiber laser oscillator that mirror based fiber optica end cap is constituted has output power more higher than traditional fiber grating oscillator.
In the present invention：Because of the input end face welding of the output end face and quartz wedge of optical fiber, interface is formed；Laser is through optical fiber
Enter in quartz wedge from interface, laser facula is transmitted and expanded in quartz wedge；The output end face of quartz wedge is special designing
Curved surface is coated with certain reflectivity film, while realizing that laser output expands, ensures laser after curved surface end face reflection
It may return in fiber core.When laser is transferred to the output end face of quartz wedge, a part of laser is from quartz wedge output end
Face expands output, and a part of laser is reflected back by output end face in the fibre core of optical fiber, at the same realize laser expand output and
Laser reflection is fed back.
The basic principle of the present invention is as follows：
In optical system, the imaging for the radius of curvature mirror for R ', object-image relation meets Gauss formula (1)：
When using concave mirror culminating point as coordinate origin, x is the abscissa of object, and x ' is the abscissa of picture, and r is concave reflection
The geometric radius of mirror.
In the present invention, object is the hot spot of optical fiber output end face, seems the hot spot of end cap camber reflection back into optical fibers endface.
In the present invention, it is desirable that fiber end face output facula and end cap feed back to the hot spot at fiber end face in same plane, i.e., defeated
Go out light beam and feedback beam to overlap at fiber end face, from the angle of object-image relation, it is desirable that object and vertical with optical axis as being in
On same plane, needs to meet x=x ', and r=-R ', can solve：
X=x'=-R ' (2)
Using formula (2), is hung down axis magnifying power β and angular magnification γ formula, had according to Gaussian optical system：
Here, hang down axis magnifying power β=- 1, illustrate as and big and the inversion, i.e. image such as object about optical axis be it is axisymmetric, by
Object in here is the hot spot of optical fiber output end face, seems the hot spot of end cap camber reflection back into optical fibers endface, this ensures that end
The light of cap reflection can be all reflected back in fiber core.Angular magnification γ=1 illustrates the subtended angle of object emission light and as receiving light
Subtended angle be equal, in a fiber, subtended angle here is equivalent to the beam divergence angle that the numerical aperture NA of optical fiber is determined,
It can effectively be incident in fiber core and be limited in the numerical aperture that fiber core is determined high this guarantees reflected light
Effect transmission.
In summary analyze, in order to realize output beam reflection after return in fiber core, fiber core central optical axis with
Quartz wedge central optical axis overlaps, the radius of curvature R of quartz wedge output face ' equal along the length L of optical axis direction with quartz wedge；I.e.
R '=- r=-L (4)
The output end face of ordinary optic fibre end cap is designed as radius of curvature with quartz wedge along optical axis direction length L phases by the present invention
Deng special spherical surface, and be coated with and matched with optical maser wavelength, there is certain reflectivity film, it is real while to output laser criterion
The feedback of existing laser.Laser in optical fiber enters from face of weld in quartz wedge, and laser facula is transmitted and expanded in quartz wedge；When
When laser is transferred to the output end face of quartz wedge, a part of laser expands output, a part of laser quilt from quartz wedge output end face
Output end face reflects back into the fibre core of optical fiber, while realizing that the output of laser is expanded and fed back.
Following technique effect can be reached using the present invention：
1 at the same realize optical-fiber laser expand and laser reflection, feedback：Using the divergence characterization of laser, optical fiber output swashs
Hot spot expands naturally when light transmits in quartz wedge, by rationally design quartz wedge, change laser transmitted in quartz wedge away from
From the output of various sizes of hot spot may be implemented；By the output curved surface of rational design, ensure that the light beam of camber reflection can have
Effect is incident in fiber core；By to reflective coating of the quartz wedge output end face plating with certain reflectivity, may be implemented to swash
The feedback of light.
2, by plating the film layer of different reflectivity to quartz wedge output end face, different output power and reflection work(may be implemented
The laser of rate ratio (0~100%) exports and reflection, typically, can realize 100% power transmission and 100% power
Feedback；This enables the device to substitute the devices such as traditional fiber grating, optical fiber total reflection mirror, is vibrated for high-power fiber
The needs such as device are realized simultaneously in the system of laser output and reflection.
Description of the drawings
From the detailed description below in conjunction with the accompanying drawings to the embodiment of the present invention, these and/or other aspects of the invention and
Advantage will become clearer and be easier to understand, wherein：
Fig. 1 is the bidirectional optical fiber end cap configuration signal for having both laser beam expanding output with reflection function of the embodiment of the present invention
Figure；
Fig. 2 is the end caps structural schematic diagram with total reflection function in the embodiment of the present invention 1；
Fig. 3 is the end caps structural schematic diagram with semi-transparent semi-reflecting function in the embodiment of the present invention 2.
Specific implementation mode
In order to make those skilled in the art more fully understand the present invention, with reference to the accompanying drawings and detailed description to this hair
It is bright to be described in further detail.
Embodiment 1
A kind of bidirectional optical fiber end cap having both laser beam expanding output and reflection function, structural schematic diagram is as shown in Figure 1, include
The quartz wedge 12 of optical fiber 11, special designing：The optical fiber 11 can be doubly clad optical fiber, by fibre core 15, inner cladding 16, surrounding layer
17 compositions, can also be single cladded-fiber, are made of fibre core 15, covering 17；Quartz wedge 12 is identical by connecting end surface size
The integral structure that round platform 18, cylinder 19 and output curved body 14 are connected in sequence；The output end face of optical fiber 11 and quartz wedge 12
Input end face (i.e. the small end face of round platform 18) welding after become an interface 13；Laser is transferred to interface from fiber core 15
After 13, into quartz wedge 12, laser successively after 18 region of round platform of quartz wedge, 19 regional nature of cylinder expand, reaches
Export the curved surface of curved body 14；The output curved body 14 of quartz wedge 12 is with the friendship of 11 core centre extended line and interface 13 of optical fiber
Point be the centre of sphere, with the center line of quartz wedge 12 round platform 18 and cylinder 19 and export curved body 14 in length and be radius of curvature
Spherical crown, output curved body 14 curved surface be coated with the reflectance coating to laser wavelength, carry out expanding the same of output to expanding laser
When, it can realize the reflection of laser, Laser feedback be returned in quartz wedge 12, and in backtracking to the fibre core 15 of optical fiber 11；Pass through
The film layer that different reflectivity/transmissivity ratio is plated to the curved surface of the output curved body 14 of quartz wedge 12, may be implemented different outputs
Power and the output of the laser of feedback power ratio (0~100%) and feedback.
Embodiment 2
A kind of end caps with total reflection function, structural schematic diagram is as shown in Fig. 2, including optical fiber 11, special designing
Quartz wedge 12：The optical fiber 11 can be doubly clad optical fiber, be made of fibre core 15, inner cladding 16, surrounding layer 17, can also be
Single cladded-fiber is made of fibre core 15, covering 17；Quartz wedge 12 is by the identical round platform 18 of connecting end surface size, 19 and of cylinder
The integral structure that output curved body 14 is connected in sequence；Become after the output end face of optical fiber 11 and quartz wedge input end face welding
One interface 13；Laser is after the fibre core 15 of optical fiber 11 is transferred to interface 13, into quartz wedge 12；Laser is successively by quartz
After 18 region of round platform of block, 19 regional nature of cylinder expand, the curved surface of output curved body 14 is reached.Quartz wedge 12 exports curved body
14 be as the centre of sphere, with the center line of quartz wedge 12 using the intersection point at fiber core elongated central line and interface 13 in round platform 18 and cylinder
19 and the length in output curved body 14 and spherical crown for radius of curvature；Output curved body 14 is coated with the total reflection to laser wavelength
Laser is all fed back to quartz wedge 12 by film, and in backtracking to the fibre core 15 of optical fiber 11, in the process, without laser
It is exported from output curved body 14.The end caps of the total reflection function of the present embodiment can be as the high reflection of all -fiber oscillator
Mirror substitutes traditional high reflection fiber grating.
Embodiment 3
A kind of bidirectional optical fiber end cap with semi-transparent semi-reflecting function, structural schematic diagram is as shown in figure 3, including optical fiber 11, spy
The quartz wedge 12 very designed：The optical fiber 11 can be doubly clad optical fiber, be made of fibre core 15, inner cladding 16, surrounding layer 17,
It can be single cladded-fiber, be made of fibre core 15, covering 17；Quartz wedge 12 is by the identical round platform 18 of connecting end surface size, column
The integral structure that body 19 and output curved body 14 are connected in sequence；The input end face of the output end face and quartz wedge 12 of optical fiber 11
Become an interface 13 after welding.Laser is after the fibre core 15 of optical fiber 11 is transferred to interface 13, into quartz wedge 12.Laser is first
Afterwards after 18 region of the round platform of quartz wedge, 19 regional nature of cylinder expand, the curved surface of output curved body 14 is reached.Quartz wedge 12
Output curved body 14 be to be existed as the centre of sphere, with the center line of quartz wedge 12 using the intersection point at fiber core elongated central line and interface 13
Round platform 18 and cylinder 19 and the length in output curved body 14 and the spherical crown for radius of curvature；Output curved body 14 is simultaneously coated with to swashing
The semi-transflective reflective film of optical band can realize the reflection of laser while carrying out expanding output to the laser after expanding, and will swash
Light feeds back to quartz wedge 12, and in backtracking to the fibre core 15 of optical fiber 11.Pass through the output end face body 14 to quartz wedge 12
Curved surface plates the film of semi-transflective reflective, and ratio of realizing is 1:1 output power and feedback power distribution.The present embodiment it is semi-transparent semi-reflecting
Bidirectional optical fiber end cap can substitute traditional low reflection output coupling optical fiber as the output coupling speculum of all -fiber oscillator
Grating.
As can be seen that the plated film that the key difference of above-mentioned 3 embodiments is to export on curved body 14 is different：It is totally reflected end
High-reflecting film, reflectivity 100%, no transmitted light are plated on output curved body 14 in cap；On output curved body 14 in high end cap thoroughly
Plate high transmittance film, transmissivity 100%, areflexia；Semi-transflective reflective film is plated on output curved body 14 in semi-transflective reflective end cap, or
Person is reflected：Transmission=1:1 film, 50% reflection, 50% transmission.Other reflectivity can certainly be plated：The film of transmission proportion, it is real
The ratio of existing different reflection/transmissions.
As can be seen that the relatively Thoughts on Optimized Design of the present invention is：A kind of pair having both laser beam expanding output and reflection function
Include optical fiber 11, quartz wedge 12, an end of 11 1 end faces of optical fiber (laser output face) and quartz wedge 12 to end caps
Another end face (laser output face exports the curved surface of curved body 14) of face (laser input face) welding, quartz wedge is
The curved surface of special designing is coated with certain reflectivity film；Quartz wedge 12 be round platform 18, cylinder 19 and output curved body 14 according to
The secondary entirety being combined into, the wherein small end of round platform 18 and 11 welding of optical fiber, big end and the cylinder 19 of round platform 18 form one, circle
Mechanical grip and fixation of the cylinder 19 for end caps, laser beam expanding light can be exported realizing by exporting the curved surface of curved body 14
While, ensure that laser may return to after exporting camber reflection in the fibre core 15 of optical fiber 11；The output end face of optical fiber 11
It is vertical with fiber length and laser transmission direction for smooth flat；12 input end face of quartz wedge is smooth flat, with quartz
Block length direction and laser transmission direction are vertical；Optical fiber output end face and the effective welding of quartzy input end face, the interface of formation
13 be also smooth flat, vertical with 11 length direction of optical fiber and 12 length direction of quartz wedge and laser transmission direction, ensures laser
It can be from being efficiently transferred in quartz in optical fiber.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes will be apparent from for the those of ordinary skill in art field.Therefore, protection scope of the present invention is answered
This is subject to the protection scope in claims.
Claims (8)
1. a kind of bidirectional optical fiber end cap having both laser beam expanding output and reflection function, which is characterized in that it includes optical fiber (11)
With the quartz wedge (12) being connect with optical fiber (11)；
The quartz wedge (12) is that the identical round platform of connecting end surface size (18), cylinder (19) and output curved body (14) connect successively
Integral structure made of connecing；
The small end face welding of one end face of the optical fiber (11) and the round platform (18) of quartz wedge (12) is formed interface (13)；
The core centre line extended line of the optical fiber (11) be quartz wedge (12) round platform (18) and cylinder (19) and export curved surface
Body (14) center line；
The surface of the output curved body (14) of the quartz wedge (12) is with the core centre extended line of optical fiber (11) and interface
(13) intersection point is the centre of sphere, with length of quartz wedge (12) center line in round platform (18) and cylinder (19) and output curved body (14)
The sum of degree is the spherical crown of radius of curvature；
It is coated on the surface of the output curved body (14) of the quartz wedge (12) and is matched with optical maser wavelength, has predetermined laser anti-
Penetrate/the film layer of transmissivity ratio.
2. the bidirectional optical fiber end cap according to claim 1 for having both laser beam expanding output and reflection function, which is characterized in that
The optical fiber (11) is the optical fiber for generating and transmitting for laser, to mix the gain fibre of rare earth ion or not mixing rare earth ion
Energy-transmission optic fibre；And cross section of optic fibre structure of the cross-sectional structure of optical fiber (11) selected from single covering, double clad and triple clad structure
In one kind.
3. the bidirectional optical fiber end cap according to claim 2 for having both laser beam expanding output and reflection function, which is characterized in that
The core diameter of optical fiber (11) is interior when the cross-sectional structure of optical fiber (11) is double-clad structure in 10~200 micron ranges
Cladding diameter is between 100~1000 microns；Outer cladding diameter is between 250~2000 microns.
4. bidirectional optical fiber end cap according to claim 1 while that there is laser beam expanding output and reflection function, feature
It is, the small end face size of the round platform (18) of the quartz wedge (12) is 2-5 times of the diameter of optical fiber (11) outermost covering.
5. the bidirectional optical fiber end cap according to claim 1 for having both laser beam expanding output and reflection function, which is characterized in that
The interface (13) of the optical fiber (11) and quartz wedge (12) welding is smooth flat, the smooth flat and optical fiber (11), quartz wedge
(12) length direction and laser transmission direction is vertical.
6. the bidirectional optical fiber end cap according to claim 1 for having both laser beam expanding output and reflection function, which is characterized in that
The cylinder (19) of the quartz wedge (12) for end caps mechanical grip and fixation, length between 10~100 millimeters,
Its diameter is between 3~500 millimeters.
7. the bidirectional optical fiber end cap according to claim 1 for having both laser beam expanding output and reflection function, which is characterized in that
The cylinder (19) is cylinder.
8. the bidirectional optical fiber for having both laser beam expanding output and reflection function according to any claim in claim 1-7
End cap, which is characterized in that it can be applied to single-ended pumping full optical fiber laser oscillator or the oscillation of both-end pumping full optical fiber laser
In device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810801530.4A CN108572420B (en) | 2018-07-20 | 2018-07-20 | Bidirectional optical fiber end cap with laser beam expansion output and reflection functions and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810801530.4A CN108572420B (en) | 2018-07-20 | 2018-07-20 | Bidirectional optical fiber end cap with laser beam expansion output and reflection functions and application thereof |
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| Publication Number | Publication Date |
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| CN108572420A true CN108572420A (en) | 2018-09-25 |
| CN108572420B CN108572420B (en) | 2024-02-02 |
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| CN109149335A (en) * | 2018-10-23 | 2019-01-04 | 中国人民解放军国防科技大学 | Wavelength coating end cap group for inhibiting stimulated Raman scattering and application thereof |
| CN109244809A (en) * | 2018-10-23 | 2019-01-18 | 中国人民解放军国防科技大学 | Zone coating end cap group with unstable inhibition mode and application thereof |
| CN112346178A (en) * | 2020-11-12 | 2021-02-09 | 中国人民解放军国防科技大学 | Integrated collimating optical fiber end cap capable of cutting off light beam and collimating optical fiber end cap array |
| CN112397980A (en) * | 2020-11-19 | 2021-02-23 | 中国兵器装备研究院 | Double-end optical fiber end cap based on two-color phase film |
| CN113325517A (en) * | 2021-08-03 | 2021-08-31 | 中国工程物理研究院激光聚变研究中心 | Optical fiber end cap and optical fiber laser |
| CN113777795A (en) * | 2021-09-19 | 2021-12-10 | 光惠（上海）激光科技有限公司 | High-power optical fiber shaping collimation output device |
| CN114153031A (en) * | 2021-11-15 | 2022-03-08 | 中国科学院上海光学精密机械研究所 | Optical fiber end cap with collimation function and preparation method thereof |
| CN114192971A (en) * | 2021-06-15 | 2022-03-18 | 苏州创鑫激光科技有限公司 | Laser processing light path system, method and application thereof |
| CN114253001A (en) * | 2021-12-27 | 2022-03-29 | 江苏大学 | Uniform light spot shaping system |
| CN115373077A (en) * | 2022-08-04 | 2022-11-22 | 江西麦帝施科技有限公司 | Optical fiber for diffusing laser |
| CN115598910A (en) * | 2022-12-13 | 2023-01-13 | 杭州中科极光科技有限公司（Cn） | Optical system for avoiding ablation of optical fiber end face and laser projection device |
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| CN109244809A (en) * | 2018-10-23 | 2019-01-18 | 中国人民解放军国防科技大学 | Zone coating end cap group with unstable inhibition mode and application thereof |
| CN109149335A (en) * | 2018-10-23 | 2019-01-04 | 中国人民解放军国防科技大学 | Wavelength coating end cap group for inhibiting stimulated Raman scattering and application thereof |
| CN109149335B (en) * | 2018-10-23 | 2024-05-17 | 中国人民解放军国防科技大学 | Wavelength coating end cap group for inhibiting stimulated Raman scattering and application thereof |
| CN109244809B (en) * | 2018-10-23 | 2023-11-07 | 中国人民解放军国防科技大学 | Region coating end cap group for inhibiting unstable mode and application thereof |
| CN112346178B (en) * | 2020-11-12 | 2022-09-02 | 中国人民解放军国防科技大学 | Integrated collimating optical fiber end cap capable of cutting off light beam and collimating optical fiber end cap array |
| CN112346178A (en) * | 2020-11-12 | 2021-02-09 | 中国人民解放军国防科技大学 | Integrated collimating optical fiber end cap capable of cutting off light beam and collimating optical fiber end cap array |
| CN112397980A (en) * | 2020-11-19 | 2021-02-23 | 中国兵器装备研究院 | Double-end optical fiber end cap based on two-color phase film |
| CN114192971A (en) * | 2021-06-15 | 2022-03-18 | 苏州创鑫激光科技有限公司 | Laser processing light path system, method and application thereof |
| CN113325517A (en) * | 2021-08-03 | 2021-08-31 | 中国工程物理研究院激光聚变研究中心 | Optical fiber end cap and optical fiber laser |
| CN113325517B (en) * | 2021-08-03 | 2021-10-15 | 中国工程物理研究院激光聚变研究中心 | Optical fiber end cap and optical fiber laser |
| CN113777795A (en) * | 2021-09-19 | 2021-12-10 | 光惠（上海）激光科技有限公司 | High-power optical fiber shaping collimation output device |
| CN114153031A (en) * | 2021-11-15 | 2022-03-08 | 中国科学院上海光学精密机械研究所 | Optical fiber end cap with collimation function and preparation method thereof |
| CN114253001A (en) * | 2021-12-27 | 2022-03-29 | 江苏大学 | Uniform light spot shaping system |
| CN115373077A (en) * | 2022-08-04 | 2022-11-22 | 江西麦帝施科技有限公司 | Optical fiber for diffusing laser |
| CN115598910A (en) * | 2022-12-13 | 2023-01-13 | 杭州中科极光科技有限公司（Cn） | Optical system for avoiding ablation of optical fiber end face and laser projection device |
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