CN107623247A - A kind of fiber laser frequency multiplier - Google Patents
A kind of fiber laser frequency multiplier Download PDFInfo
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- CN107623247A CN107623247A CN201710940425.4A CN201710940425A CN107623247A CN 107623247 A CN107623247 A CN 107623247A CN 201710940425 A CN201710940425 A CN 201710940425A CN 107623247 A CN107623247 A CN 107623247A
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- Prior art keywords
- frequency
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- fiber laser
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- 239000000835 fiber Substances 0.000 title claims abstract description 32
- 239000013078 crystal Substances 0.000 claims abstract description 51
- 239000013307 optical fiber Substances 0.000 claims abstract description 16
- 230000010287 polarization Effects 0.000 claims abstract description 10
- QWVYNEUUYROOSZ-UHFFFAOYSA-N trioxido(oxo)vanadium;yttrium(3+) Chemical group [Y+3].[O-][V]([O-])([O-])=O QWVYNEUUYROOSZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- VCZFPTGOQQOZGI-UHFFFAOYSA-N lithium bis(oxoboranyloxy)borinate Chemical compound [Li+].[O-]B(OB=O)OB=O VCZFPTGOQQOZGI-UHFFFAOYSA-N 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims description 2
- 229910052700 potassium Inorganic materials 0.000 claims description 2
- 239000011591 potassium Substances 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- 238000009738 saturating Methods 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052788 barium Inorganic materials 0.000 claims 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims 1
- 239000004327 boric acid Substances 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
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- Lasers (AREA)
- Laser Surgery Devices (AREA)
Abstract
The invention discloses a kind of fiber laser frequency multiplier, belong to optical-fiber laser domain technology field, the fiber laser frequency multiplier includes the polarizer, condenser lens, Transflective mirror, frequency-doubling crystal, double-colored wave plate, concave surface hysteroscope, light beam bundling device, and the fiber laser frequency multiplier assembling sequence is followed successively by the polarizer, condenser lens, Transflective mirror, frequency-doubling crystal, double-colored wave plate, concave surface hysteroscope, light beam bundling device.The present invention carries out polarization converted and control using a double-colored wave plate to fundamental frequency light and frequency doubled light, and the linear polarization that subcircular frequency doubled light can be obtained under conditions of luminous power is not changed efficiently exports, obtain higher frequency multiplication optical fiber lasing efficiency and laser power, it is more to overcome the optical element that prior art uses, light path is complicated, it is big to adjust difficulty, also add the technical problem of the cost of manufacture of frequency multiplier.
Description
Technical field
The invention belongs to optical-fiber laser domain technology field, and in particular to a kind of fiber laser frequency multiplier.
Background technology
Optical fiber laser especially high-capacity optical fiber laser obtains considerable hair in field of laser processing in recent years
, there is large quantities of commercialized high-capacity optical fiber lasers and associated laser product in exhibition, and in high power light
In the development course of fibre laser, optical-fiber laser frequency doubling technology and fiber laser frequency multiplier are always one and are related to less side
Face, it is generally all multimode non-polarized light beam that it, which is primarily due to the laser output mode of high-capacity optical fiber laser, and with
It is difficult that high efficiency carries out laser freuqency doubling that machine non-polarized light beam, which is,.In order to obtain higher frequency multiplication optical fiber lasing efficiency and laser work(
For rate, it is necessary to which reasonable in design, easy to operate frequency multiplier structure meets actual demand, the way of prior art is that use is longer
Walk off crystal, basic frequency laser o, e light separation for exporting optical-fiber laser, independent Polarization Control then is carried out to o, e light path, made
It produces double-frequency laser with different light paths respectively, then carries out frequency multiplication combiner output.The optics that this mode is not used only
Element is more, and light path is complicated, and regulation difficulty is big, also add the cost of manufacture of frequency multiplier.
The content of the invention
（1）Technical scheme
For overcome the deficiencies in the prior art, the present invention provides a kind of fiber laser frequency multiplier, the fiber laser frequency multiplier bag
Include the polarizer, condenser lens, Transflective mirror, frequency-doubling crystal, double-colored wave plate, concave surface hysteroscope, light beam bundling device, the light
Fine laser frequency multiplier assembling sequence is followed successively by the polarizer, condenser lens, Transflective mirror, frequency-doubling crystal, double-colored wave plate, concave surface chamber
Mirror, light beam bundling device, the polarizer are formed by walking off crystal, and the crystal that walks off can make the optical fiber of random polarization state
Laser beam transformation is mutually orthogonal linearly polarized light, and the condenser lens is made up of focusing convex lens, and the Transflective mirror is
The Double-color film that face plating is anti-reflection to fundamental frequency light, anti-to frequency doubled light height is penetrated, the frequency-doubling crystal is made up of frequency doubling non-linear's crystal, described
Double-colored wave plate includes the double-colored quartz wave-plate of the quarter wave plate to fundamental frequency light and the full-wave plate to frequency doubled light, the concave surface hysteroscope
The plane of incidence is coated with to fundamental frequency light height instead, contains the Double-color film anti-reflection to frequency doubled light simultaneously, the light beam bundling device is optical fiber
Type or free space type light beam bundling device.
Described fiber laser frequency multiplier carries out polarization converted and control using double-colored wave plate to fundamental frequency light and frequency doubled light.
Further, the crystal that walks off in the polarizer is yttrium vanadate crystal or α-barium borate crystal.
Further, the thickness of the yttrium vanadate crystal or α-barium borate crystal is between 0.05 ~ 0.5mm, preferably 0.1mm
Or 0.2mm.
Further, the fiber laser frequency multiplier is by the polarizer, Transflective mirror, frequency-doubling crystal, double-colored wave plate, concave surface
Hysteroscope and light beam bundling device are formed.
Further, frequency doubling non-linear's crystal includes beta-barium borate crystal, lithium triborate crystal, caesium-lithium borate crystal
And potassium titanyl oxygenic phosphate(KTP) crystal.
Further, the condenser lens is identical with the focal length of the concave surface hysteroscope.
Further, the exit facet of the Transflective mirror and the plane of incidence composition laser cavity structure of the concave surface hysteroscope.
Further, the fiber laser frequency multiplier is by the polarizer, Transflective mirror, frequency-doubling crystal, double-colored wave plate, polarization
Light beam bundling device is formed, and the exit facet of the double-colored wave plate is coated with to fundamental frequency light height instead and to the anti-reflection Double-color film of frequency doubled light
Layer so that the exit facet composition laser cavity structure of the exit facet of the Transflective mirror and the double-colored wave plate, the transmission are anti-
Penetrate and frequency-doubling crystal is provided between mirror and the double-colored wave plate.
（2）Beneficial effect
Beneficial effects of the present invention：Compared to prior art, the present invention is entered using a double-colored wave plate to fundamental frequency light and frequency doubled light
Row polarization converted and control, and the linear polarization that can obtain under conditions of luminous power is not changed subcircular frequency doubled light is efficient
Output, obtains higher frequency multiplication optical fiber lasing efficiency and laser power, and it is more to overcome the optical element that prior art uses,
Light path is complicated, and regulation difficulty is big, also add the technical problem of the cost of manufacture of frequency multiplier.
Brief description of the drawings
Fig. 1 is the fiber laser frequency multiplier structural representation in embodiment 1；
Fig. 2 is the fiber laser frequency multiplier structural representation in embodiment 2；
Fig. 3 is the fiber laser frequency multiplier structural representation in embodiment 3.
Embodiment
With reference to embodiment, the present invention is further illustrated.
Embodiment one
As shown in figure 1, the fundamental frequency o light 202, the light beam of fundamental frequency e light 201 in the implementation case are substantially overlapping, overlapping hot spot
Subcircular, in order to illustrate laser optical path action principle, two light beams are subjected to separation marking.
The structure composition of the fiber laser frequency multiplier of the present embodiment includes：The polarizer 101, condenser lens 102, Transflective
Mirror 103, nonlinear crystal 104, double-colored wave plate 105, concave surface hysteroscope 106, light beam bundling device 107.Wherein the polarizer 101 is
Yttrium Orthovanadate walks off crystal so that non-polarized fibre laser is separated with fundamental frequency o light 202 and fundamental frequency e light 201, by the He of condenser lens 102
Condenser lens 102 in the 2f systems that concave surface hysteroscope 106 forms is focused, incident beta-barium borate nonlinear crystal 104.Poly-
Transflective mirror 103 is inserted between focus lens 102 and beta-barium borate nonlinear crystal 104, its exit facet is coated with to fundamental frequency light
AR films or the HR films to frequency doubled light.Fundamental frequency light o light 202 produces the e light of frequency multiplication, fundamental frequency e by beta-barium borate nonlinear crystal 104
Light 201 during beta-barium borate nonlinear crystal 104 without frequency doubling non-linear by changing.Then, the fundamental frequency e light 201 of non-frequency multiplication
With frequency multiplication e light after double-colored wave plate 105, in double-colored wave plate 105 is quarter wave plate to fundamental frequency light, is full-wave plate to frequency doubled light,
Fundamental frequency e light 201 is transformed to fundamental frequency o light 202, the negative side of fundamental frequency o light 202 after the reflection of concave surface hysteroscope 106 returns to double-colored wave plate 105
Frequency multiplication e light is produced to being acted on beta-barium borate nonlinear crystal 104, frequency multiplication e light exports after the reflection of Transflective mirror 103.Most
Afterwards, two beam frequency multiplication e light carry out the synthesis output of double-frequency laser light beam by light beam bundling device 107.The advantages of this system is to walk
From crystal thickness within 0.2mm, now frequency multiplication e light spacing only has 20um or so, need not carry out conjunction beam, hot spot again substantially
And subcircular.
Embodiment two
As shown in Fig. 2 the fiber laser frequency multiplier of the present embodiment eliminates condenser lens 102, remaining construction and the phase of embodiment one
Together, exported due to higher in high power optical fibre laser power output collimated light beam it is with a tight waist it is smaller in the case of, especially
It is under the conditions of exporting pulse laser, when light intensity has met to obtain efficient frequency doubled light at the waist spot of its fundamental frequency light, using saturating
Mirror strong-focusing may damage frequency-doubling crystal.Remaining element function and its implementation process are identical with embodiment one, no longer superfluous herein
State.
Embodiment three
As shown in figure 3, the fiber laser frequency multiplier of the present embodiment eliminates concave surface hysteroscope 106 and condenser lens 102, its
Remaining construction and embodiment one are identical, and then are being quarter wave plate to fundamental frequency light, are being the double-colored wave plate 301 of full-wave plate to frequency doubled light
It is coated with exit facet to the fundamental frequency light height double-colored film layer anti-reflection to frequency doubled light on the contrary so that the outgoing end face of Transflective mirror 103
Laser cavity structure is formed with the outgoing end face of double-colored wave plate 301.And it is possible to remove light beam bundling device 107, by the polarizer
101st, Transflective mirror 103, nonlinear crystal 104 and double-colored wave plate 301 carry out optical cement or in-depth optical cement processing, make its structure
More compact, use is more convenient.Remaining element function and its implementation process are identical with embodiment one, will not be repeated here.
Embodiment described above only expresses the preferred embodiment of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformations can also be made, improves and substitutes, these belong to this hair
Bright protection domain.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of fiber laser frequency multiplier, it is characterised in that the fiber laser frequency multiplier includes the polarizer（101）, focus on it is saturating
Mirror（102）, Transflective mirror（103）, frequency-doubling crystal（104）, double-colored wave plate（105）, concave surface hysteroscope（106）, light beam close
Beam device（107）, the fiber laser frequency multiplier assembling sequence is followed successively by the polarizer（101）, condenser lens（102）, Transflective
Mirror（103）, frequency-doubling crystal（104）, double-colored wave plate（105）, concave surface hysteroscope（106）, light beam bundling device（107）, described
Inclined device（101）Formed by walking off crystal, it is described to walk off crystal to be transformed to the optical-fiber laser of random polarization state mutually orthogonal
Linearly polarized light, the condenser lens（102）It is made up of focusing convex lens, the Transflective mirror（103）For exit facet plating pair
Fundamental frequency light is anti-reflection, to the high anti-Double-color film of frequency doubled light, the frequency-doubling crystal（104）It is made up of frequency doubling non-linear's crystal, it is described double
Color wave plate（105）The double-colored quartz wave-plate of full-wave plate including the quarter wave plate to fundamental frequency light and to frequency doubled light, the double-colored wave plate
（105）Polarization converted and control, the concave surface hysteroscope can be carried out to fundamental frequency light and frequency doubled light（106）The plane of incidence be coated with pair
Fundamental frequency light is high anti-, contains the Double-color film anti-reflection to frequency doubled light, the light beam bundling device simultaneously（107）For optical-fiber type or freedom
Spatial mode light beam bundling device.
A kind of 2. fiber laser frequency multiplier according to claim 1, it is characterised in that：The polarizer（101）In walk
It is yttrium vanadate crystal or α-barium borate crystal from crystal.
A kind of 3. fiber laser frequency multiplier according to claim 2, it is characterised in that：The yttrium vanadate crystal or α-boric acid
The thickness of crystal of barium is between 0.05 ~ 0.5mm.
A kind of 4. fiber laser frequency multiplier according to claim 1, it is characterised in that：The fiber laser frequency multiplier is by
Inclined device（101）, Transflective mirror（103）, frequency-doubling crystal（104）, double-colored wave plate（105）, concave surface hysteroscope（106）And light beam
Bundling device（107）Form.
A kind of 5. fiber laser frequency multiplier according to claim 1, it is characterised in that：Frequency doubling non-linear's crystal includes
Beta-barium borate crystal, lithium triborate crystal, caesium-lithium borate crystal and potassium titanyl oxygenic phosphate(KTP) crystal.
A kind of 6. fiber laser frequency multiplier according to claim 1, it is characterised in that：The condenser lens（102）With institute
State concave surface hysteroscope（106）Focal length it is identical.
A kind of 7. fiber laser frequency multiplier according to claim 1, it is characterised in that：The Transflective mirror（103）'s
Exit facet and the concave surface hysteroscope（106）The plane of incidence composition laser cavity structure.
A kind of 8. fiber laser frequency multiplier according to claim 1 or 7, it is characterised in that：The fiber laser frequency multiplier
By the polarizer（101）, Transflective mirror（103）, frequency-doubling crystal（104）, double-colored wave plate（105）, light beam bundling device（107）
Form, and the double-colored wave plate（105）Exit facet be coated with high anti-to fundamental frequency light and to the anti-reflection double-colored film layer of frequency doubled light, make
Obtain the Transflective mirror（103）Exit facet and the double-colored wave plate（105）Exit facet composition laser cavity structure, it is described
Penetrate speculum（103）With the double-colored wave plate（105）Between be provided with frequency-doubling crystal（104）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710940425.4A CN107623247B (en) | 2017-10-11 | 2017-10-11 | Fiber laser frequency multiplier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710940425.4A CN107623247B (en) | 2017-10-11 | 2017-10-11 | Fiber laser frequency multiplier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107623247A true CN107623247A (en) | 2018-01-23 |
| CN107623247B CN107623247B (en) | 2023-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710940425.4A Active CN107623247B (en) | 2017-10-11 | 2017-10-11 | Fiber laser frequency multiplier |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112269260A (en) * | 2020-09-27 | 2021-01-26 | 北京卓镭激光技术有限公司 | Laser switching device and method |
| CN114859567A (en) * | 2022-06-02 | 2022-08-05 | 中国科学院苏州生物医学工程技术研究所 | Laser beam combination coupling device |
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| CN107623247B (en) | 2023-12-26 |
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