CN206850219U - A kind of fiber laser frequency multiplier part - Google Patents
A kind of fiber laser frequency multiplier part Download PDFInfo
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- CN206850219U CN206850219U CN201720770249.XU CN201720770249U CN206850219U CN 206850219 U CN206850219 U CN 206850219U CN 201720770249 U CN201720770249 U CN 201720770249U CN 206850219 U CN206850219 U CN 206850219U
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- 239000013307 optical fiber Substances 0.000 claims abstract description 58
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- VCZFPTGOQQOZGI-UHFFFAOYSA-N lithium bis(oxoboranyloxy)borinate Chemical compound [Li+].[O-]B(OB=O)OB=O VCZFPTGOQQOZGI-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a kind of fiber laser frequency multiplier part, the fundamental frequency light of optical fiber output is carried out being collimated into parallel light output including optical fiber collimator, the fundamental frequency light of polarization state random distribution is separated into the two beam directions of propagation into 90 degree and the mutually perpendicular two bunch polarised light in polarization direction by polarization spectroscope, linearly polarized light realizes the deflection of the direction of propagation through speculum, two bunch polarised lights realize that secondary frequency multiplication obtains double-frequency laser output through frequency-doubling crystal, two beam double-frequency lasers are overlapped by polarization beam combiner, the fibre core output through optical fiber collimator coupled into optical fibres.The utility model is split using the polarization spectroscope fundamental frequency light unrelated to polarization and distinguishes frequency multiplication, effectively improves the shg efficiency of optical fiber laser；The optical fiber output that double-frequency laser is realized in shaping is carried out to the light beam of fundamental frequency light and frequency doubled light using optical fiber collimator, there can be the advantages of shg efficiency is high, stability is good, easily operated as independent fiber laser frequency multiplier part.
Description
Technical field
The application belongs to laser technology field, specifically, is related to a kind of fiber laser frequency multiplier part.
Background technology
The advantages that optical fiber laser is with its small volume, electro-optical efficiency height, good beam quality, leads in industrial laserses application
Domain is quickly grown, and what is be widely used at present has the continuous or pulse of tri- kinds of optical maser wavelength output of 1064nm, 1550nm, 2000nm
The optical fiber laser of form.But in laser application, different application material is different to the absorption characteristic of optical maser wavelength, and optical fiber swashs
Light device output wavelength limits its further application.In order to expand the output wavelength scope of optical fiber laser, frequently with non-thread
Property the fundamental frequency light that is exported to optical fiber laser of frequency-doubling crystal carry out the double-frequency laser output that low wavelength is realized in second harmonic effect.
The application for obtaining the output of visible light wave range laser using nonlinear frequency transformation technology in all solid state laser is special
It is unripe, particularly all-solid state laser intracavity frequency doubling technology, but the volume of solid state laser is big, electro-optical efficiency is low, stably
Property is poor, maintenance cost is high.In order to expand the scope of laser output wavelength, double-frequency laser caused by nonlinear crystal frequency-doubled effect is defeated
The research gone out receives much concern.Such as：Patent " the high-power green-light fiber laser of 540nm all optical fibre structures（Publication No.
CN201210222630.4）" middle by the way of intracavity frequency doubling that the frequency-doubling crystal with collimation focusing function is individual with unification
540nm total reflection fiber gratings build the green glow output that frequency doubling cavity realizes 540nm in 1064nm resonator.The system is to obtain
Obtain high-power green glow output and require that all optical fiber is polarization maintaining optical fibre, high is required to device welding, complete machine high expensive.Specially
A kind of sharp " green-light fiber laser（Publication No. CN201110302554.3）" by the way of cavity external frequency multiplication, use lens group
The fundamental frequency light that optical fiber laser exports is focused on Brewster piece, Brewster piece transmitted light progress secondary frequency multiplication is realized green
There is the problem of shg efficiency is low in light output, the system, it is relatively difficult to produce high power frequency multiplication light output.
Utility model content
In view of this, technical problems to be solved in this application there is provided a kind of fiber laser frequency multiplier part, by setting
Optical fiber collimator, polarization spectroscope beam splitting are put, frequency-doubling crystal and polarization beam combiner close beam, improve basic frequency laser shg efficiency,
Realize that double-frequency laser tail optical fiber exports.
In order to solve the above-mentioned technical problem, this application discloses a kind of fiber laser frequency multiplier part, it includes：Fiber optic collimator
Device, optical fiber collimator carry out collimation output to the basic frequency laser of optical fiber output；Polarization spectroscope, polarization spectroscope is by basic frequency laser
The two beam directions of propagation are separated into an angle of 90 degrees and mutually perpendicular first linearly polarized light of polarization state and the second linearly polarized light；Wherein,
First linearly polarized light forms the double-frequency laser of second harmonic after frequency-doubling crystal, and double-frequency laser is realized through the first speculum and propagated
The deflection of light path enters polarization beam combiner；Second linearly polarized light enters frequency-doubling crystal after the second speculum realizes optical path-deflecting
Form double-frequency laser and enter polarization beam combiner；Two beam double-frequency lasers are overlapped by polarization beam combiner, are coupled into a branch of frequency doubled light
Into optical fiber collimator.Frequency doubled light after optical fiber collimator pairing beam is focused, and frequency doubled light coupled into optical fibres fibre core is realized
Optical fiber output.
According to an embodiment of the present utility model, wherein above-mentioned optical fiber collimator is melted by undoped passive fiber end
It is connected to GRIN Lens realization.
According to an embodiment of the present utility model, wherein above-mentioned polarization spectroscope is handed over for one kind between two right-angle prisms
That replaces plates high index of refraction and low refractive index film layer material, and the glued block prism formed.
According to an embodiment of the present utility model, wherein above-mentioned frequency-doubling crystal is brilliant for the optics with nonlinear interaction
Body.
According to an embodiment of the present utility model, wherein above-mentioned first speculum is coated with the high projection of basic frequency laser and frequency multiplication
The film layer of laser total reflection, the second speculum are totally reflected film layer to be coated with basic frequency laser.
According to an embodiment of the present utility model, wherein above-mentioned first speculum is put with the second speculum into pre- controlling angle
Put, for deflecting laser transmission direction, pre- controlling angle is 45 degree.
According to an embodiment of the present utility model, wherein above-mentioned polarization beam combiner is identical with polarization spectroscope structure, partially
The spectroscope that shakes is split to basic frequency laser, and the frequency multiplication that polarization beam combiner is formed to the first linearly polarized light with the second linearly polarized light swashs
Light carries out conjunction beam.
According to an embodiment of the present utility model, wherein fine accurate using two optical fiber collimators, fundamental frequency light output time
Straight device carries out collimation output to fundamental frequency light, and frequency multiplication light output time fibre collimater is focused coupled into optical fibres fibre to frequency doubled light
Core, realize double-frequency laser optical fiber output.
Compared with prior art, the application can be obtained including following technique effect：
1）It is mutually perpendicular that the fundamental frequency light of polarization state random distribution is separated into by two beam polarization states using polarization spectroscope
Polarised light, two beam polarised lights are respectively adopted frequency-doubling crystal and carry out secondary frequency multiplication, improve the utilization rate of fundamental frequency fundamental frequency light, effectively improve
The shg efficiency of laser.
2）Two beam double-frequency lasers are superimposed output using polarization beam combiner, effectively improve the output work of double-frequency laser
Rate.
3）Optical fiber collimator is used as online laser frequency multiplier, the input of fundamental frequency light is realized, the output of frequency doubled light, makees
It is easy to use for independent frequency doubling device.
Certainly, implementing any product of the application must be not necessarily required to reach all the above technique effect simultaneously.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding of the present application, forms the part of the application, this Shen
Schematic description and description please is used to explain the application, does not form the improper restriction to the application.In the accompanying drawings：
Fig. 1 is the light path schematic diagram of the fiber laser frequency multiplier part of the embodiment of the utility model one；
Fig. 2 is the optical fiber collimator structure schematic diagram of the embodiment of the utility model one；
Fig. 3 is the polarization spectroscope operation principle schematic diagram of the embodiment of the utility model one.
Reference
Optical fiber collimator 10, polarization spectroscope 20, frequency-doubling crystal 30, the first speculum 40, the second speculum 50, polarization close
Beam device 60, optical fiber collimator 70, optical fiber 11, GRIN Lens 12, basic frequency laser A, the first linearly polarized light a1, the second linearly polarized light
A2, frequency doubled light B, prefabricated angle, θ, incident light M, transmitted light m1, reflected light m2.
Embodiment
Presently filed embodiment is described in detail below in conjunction with drawings and Examples, and thereby how the application is applied
Technological means can fully understand and implement according to this to solve technical problem and reach the implementation process of technical effect.
Fig. 1 to Fig. 3 is refer to, Fig. 1 is the light path signal of the fiber laser frequency multiplier part of the embodiment of the utility model one
Figure；Fig. 2 is the optical fiber collimator structure schematic diagram of the embodiment of the utility model one；Fig. 3 is the embodiment of the utility model one
Polarization spectroscope operation principle schematic diagram.A kind of fiber laser frequency multiplier part includes base of the optical fiber collimator 10 to optical fiber output
Frequency light A carries out collimation and forms parallel light output, and the fundamental frequency light A of direction of vibration random distribution is separated into two beams by polarization spectroscope 20
Direction of propagation angle is into an angle of 90 degrees and orthogonal first linearly polarized light a1 and the second linearly polarized light a2；Wherein, First Line is inclined
The a1 light that shakes enters polarization beam combiner 60 by the speculum 40 of frequency-doubling crystal 30 and first；Second linearly polarized light a2 is by the second reflection
Mirror 50 and frequency-doubling crystal 30 enter polarization beam combiner 60；Polarization beam combiner 60 will be superimposed the first linearly polarized light a1 and the second linear polarization
Light a2 into frequency doubled light B；Frequency doubled light B focuses on through optical fiber collimator 70 is coupled to optical fiber output.
Optical fiber collimator 10 has GRIN Lens 12 by the end welding of core diameter 10um, 20um, 25um passive fiber 11
It is made.It is worth mentioning that the making of optical fiber collimator 70 and optical fiber collimator 10 are identical, difference is optical fiber standard
The finishing of optical fiber output is formed directional light output by straight device 10, and optical fiber collimator 70 is by the fibre core of parallel light focusing to optical fiber
In, realize frequency doubled light B optical fiber output.
As shown in figure 3, the operation principle schematic diagram of polarization spectroscope 20 of the embodiment of the utility model one.As illustrated,
Polarization spectroscope 20 alternately plates high index of refraction and the film layer 21 of low-refraction to be a kind of between two right-angle glass prisms, and
One piece of block prism that gluing forms, efficient splitting ratio can be obtained by the design of film layer and the number of plies.Incident light M perpendicular to
Prism surface, multilayer dielectricity film layer 21 is incided with 45 degree of angles, after film layer 21 reflects and transmitted, reflected light m2 and transmitted light m1
It is emitted perpendicular to prism surface with separating 90 degree of directions.The reflected light m2 and transmitted light m1 of outgoing are that two beam direction of vibration hang down mutually
Straight linearly polarized light.
In the embodiment of the utility model one, frequency-doubling crystal 30 be lithium triborate crystal LBO, BBO Crystal BBO,
Potassium titanyl oxygenic phosphate(KTP) crystal KDP or potassium dihydrogen phosphate crystal KTP nonlinear crystal.Nonlinear crystal translucency is good, laser damage
Hinder threshold height.First linearly polarized light a1 and the second linearly polarized light a2 is carried out second harmonic effect by frequency-doubling crystal 30, can be by fundamental frequency
Light A is converted into frequency doubled light B.
In Fig. 1, the first speculum 24 and the second speculum 25 are all with laser transmission direction into predetermined angle theta, predetermined angle theta
For 45 degree.The first speculum 40 is coated with the eyeglass of the high projection film layers of frequency doubled light B total reflection fundamental frequency lights A simultaneously, realizes that First Line is inclined
The deflection for the frequency doubled light B transmission directions that the light of the light a1 that shakes outputs is formed through frequency-doubling crystal 30, the second speculum 50 are coated with fundamental frequency light A
The eyeglass of film layer is totally reflected, horizontal deflection is entered to the fundamental frequency light A direction of propagation.Two beam frequency doubled lights are real under the effect of polarization beam combiner 60
Now close beam output.Fundamental frequency light B is coupled in the fibre core of optical fiber by the self-focusing effect of optical fiber collimator 70 realizes optical fiber output.
It is noted that polarization beam combiner 60 of the present utility model is identical with the structure of polarization spectroscope 20, polarization spectro
Mirror 20 is split to basic frequency laser A, and polarization beam combiner 60 carries out conjunction beam to the first linearly polarized light a1 and the second linearly polarized light a2,
More specifically, i.e., polarization beam combiner 60 is realized the conjunction beam of the two bunch polarised lights acted on by frequency-doubling crystal 30 and is superimposed, and obtains
To efficient double-frequency laser B, raising frequency doubled light B power output.
Operation principle of the present utility model：The utility model uses the fundamental frequency that polarization spectroscope 20 exports free polarization state
Separation by laser is in an angle of 90 degrees and the mutually perpendicular two bunch polarised light of direction of vibration into the two beam directions of propagation, and two bunch polarised lights divide
Frequency doubled light B is not produced by the second harmonic effect of frequency-doubling crystal 30, improves basic frequency laser A utilization rate.Finally using inclined
Two beam frequency doubled light B are coupled into a branch of light output by the bundling device 60 that shakes, and improve frequency doubled light B power output.The utility model uses
Optical fiber collimator 70 focuses on frequency doubled light B the fibre core for being coupled to optical fiber, realizes the optical fiber output of double-frequency laser, and the utility model is made
For independent laser frequency-doubling device, be advantageous to the application of frequency doubled light.
Some preferred embodiments of the application have shown and described in described above, but as previously described, it should be understood that the application
Be not limited to form disclosed herein, be not to be taken as the exclusion to other embodiment, and available for various other combinations,
Modification and environment, and above-mentioned teaching or the technology or knowledge of association area can be passed through in application contemplated scope described herein
It is modified., then all should be in this Shen and the change and change that those skilled in the art are carried out do not depart from spirit and scope
Please be in the protection domain of appended claims.
Claims (8)
- A kind of 1. fiber laser frequency multiplier part, it is characterised in that including：Optical fiber collimator, the optical fiber collimator carry out collimation output to the basic frequency laser of optical fiber output；The basic frequency laser is separated into the two beam directions of propagation into an angle of 90 degrees and polarization state by polarization spectroscope, the polarization spectroscope Mutually perpendicular first linearly polarized light and the second linearly polarized light；Wherein, first linearly polarized light forms the double-frequency laser of second harmonic, the double-frequency laser warp after frequency-doubling crystal First speculum realizes that the deflection for propagating light path enters polarization beam combiner；Second linearly polarized light is realized by the second speculum Enter frequency-doubling crystal formation double-frequency laser after optical path-deflecting and enter the polarization beam combiner；Two beam double-frequency lasers are overlapped by the polarization beam combiner, are coupled into a branch of frequency doubled light and are entered optical fiber collimator；Frequency doubled light after the optical fiber collimator pairing beam is focused, and frequency doubled light coupled into optical fibres fibre core is realized into optical fiber is defeated Go out.
- 2. fiber laser frequency multiplier part according to claim 1, it is characterised in that wherein described optical fiber collimator is mixed by non- Miscellaneous passive fiber end welding has GRIN Lens realization.
- 3. fiber laser frequency multiplier part according to claim 1, it is characterised in that wherein described polarization spectroscope is one kind High index of refraction and low refractive index film layer material, and the glued block prism formed are alternately plated between two right-angle prisms.
- 4. fiber laser frequency multiplier part according to claim 1, it is characterised in that wherein described frequency-doubling crystal is with non- The optical crystal of linear action.
- 5. fiber laser frequency multiplier part according to claim 1, it is characterised in that wherein described first speculum is coated with base The high projection of frequency laser and the film layer of double-frequency laser total reflection, second speculum are to be coated with basic frequency laser to be totally reflected film layer.
- 6. fiber laser frequency multiplier part according to claim 5, it is characterised in that wherein described first speculum with it is described Second speculum is placed into pre- controlling angle, and for deflecting laser transmission direction, pre- controlling angle is 45 degree.
- 7. fiber laser frequency multiplier part according to claim 3, it is characterised in that wherein described polarization beam combiner with it is described Polarization spectroscope structure is identical, and the polarization spectroscope is split to the basic frequency laser, and the polarization beam combiner is to described The double-frequency laser that first linearly polarized light is formed with second linearly polarized light carries out conjunction beam.
- 8. fiber laser frequency multiplier part according to claim 2, it is characterised in that wherein using two optical fiber collimators, Fundamental frequency light output time fibre collimater carries out collimation output to fundamental frequency light, and frequency multiplication light output time fibre collimater is carried out to frequency doubled light Coupled into optical fibres fibre core is focused on, realizes double-frequency laser optical fiber output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720770249.XU CN206850219U (en) | 2017-06-29 | 2017-06-29 | A kind of fiber laser frequency multiplier part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720770249.XU CN206850219U (en) | 2017-06-29 | 2017-06-29 | A kind of fiber laser frequency multiplier part |
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| Publication Number | Publication Date |
|---|---|
| CN206850219U true CN206850219U (en) | 2018-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720770249.XU Active CN206850219U (en) | 2017-06-29 | 2017-06-29 | A kind of fiber laser frequency multiplier part |
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| Country | Link |
|---|---|
| CN (1) | CN206850219U (en) |
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| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Entrepreneurship Service Center, High-tech Zone, No. 99, Zhulin Road, Danyang City, Zhenjiang City, Jiangsu Province 212300 Patentee after: Jiangsu Skyera Laser Technology Co.,Ltd. Address before: No. 8, High tech Industrial Park Concentration Zone, Danyang City, Zhenjiang City, Jiangsu Province, 212300 Patentee before: JIANGSU SKYERALASER TECHNOLOGY CO.,LTD. |
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| CP03 | Change of name, title or address |