CN206789869U - A kind of optional laser of visible waveband multi-wavelength - Google Patents
A kind of optional laser of visible waveband multi-wavelength Download PDFInfo
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- CN206789869U CN206789869U CN201720527685.4U CN201720527685U CN206789869U CN 206789869 U CN206789869 U CN 206789869U CN 201720527685 U CN201720527685 U CN 201720527685U CN 206789869 U CN206789869 U CN 206789869U
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Abstract
It the utility model is related to a kind of optional laser of visible waveband multi-wavelength, including body, pumping source is disposed with the body, full-reverse lens, Nd-doped yttrium vanadate crystal, Q-switch, middle eyeglass, bbo crystal, output optic acts, coupled lens and optical fiber, the full-reverse lens constitute the vibration chamber of fundamental frequency light and each rank Storrs light with output optic acts, realize basic frequency laser, single order stokes light and second order of Stokes light are simultaneously in vibration intracavitary vibration, the pumping source, full-reverse lens, Nd-doped yttrium vanadate crystal, Q-switch, middle eyeglass, bbo crystal, the longitudinal center line of output optic acts and coupled lens, which overlaps, to be placed, described bbo crystal, which is arranged at, to be rotated horizontally on regulating platform.The utility model has the advantages that it is reasonable in design, optical element is few, stability is good.
Description
Technical field
The utility model belongs to laser technology application field, is specifically related to a kind of optional laser of visible waveband multi-wavelength
Device.
Background technology
The optional multiple-wavelength laser of different colours has important application in medical domain, especially for fundus oculi disease
Treatment.Retinopathy is the multiple disease of ophthalmology medical domain most commonly encountered diseases.At present, Patients With Fundus Disease Treated By Laser have accumulated abundant
Clinical experience, and there is significant curative effect.Multiwavelength laser can overcome eye to bend compared to single wavelength laser in retinopathy treatment
The muddy obstacle of optical medium, for different lesions tissue to different color optical absorption characteristics, carried out from different wave length laser
Treatment, can improve therapeutic effect, reduce the damage to tissue, expand the diagnosis and treatment range of clinical ophthalmology, turn into clinical ophthalmology and swash
The developing direction of light treatment.
Multi-wavelength krypton laser therapy apparatus more early enters clinical ophthalmology, is the current wide retinopathy multiwavelength laser used
Therapeutic equipment（Ophthalmology, 2008,115(3): 540-545）.But krypton laser belongs to gas laser, there is volume huge
Greatly, efficiency is low, the shortcomings of stability and poor reliability.With the development of laser technology, semiconductor pump pumping full-solid multi-wavelength
Laser starts to control applied to retinopathy due to having the advantages that small volume, efficiency high, stability are good, reliability is high, long lifespan
Treat.What application report was more at present is to be based on Doped ions in same laser crystal to launch different wave length under different energy level transitions
Coherent light, then the multi-wavelength visible waveband laser for realizing different colours by different nonlinear optical crystal frequency conversions respectively export
（Chinese Journal of Medical Instrumentation, 36,326-328 (2012)；Laser and optoelectronics are in progress, 46,65-67 (2009)）.Certain
The defects of conventional solid state laser output wavelength is single is overcome in degree, while also overcomes conventional krypton multiwavelength laser treatment
The deficiency of equipment, and expand the indication scope of retinopathy treatment.
But the semiconductor pump pumping full-solid multiple-wavelength laser applied at present is in order to realize that Doped ions jump in different energy levels
Move, it is necessary to using different resonators；Further realize that the output of different colours laser is needed by the different nonlinear optical of polylith
Learn crystal.Different colours multiwavelength laser obtain or it is complex, required optical element is also more so that cost is higher,
System is unstable.
Utility model content
The utility model embodiment technical problem to be solved is, there is provided a kind of reasonable in design, optical element
Less, the good a kind of optional laser of visible waveband multi-wavelength of stability.
To achieve the above object, the technical solution of the utility model is to include body, and pump is disposed with the body
Pu source, full-reverse lens, Nd-doped yttrium vanadate crystal, Q-switch, middle eyeglass, bbo crystal, output optic acts, coupled lens and optical fiber,
The full-reverse lens and output optic acts constitute the vibration chamber of fundamental frequency light and each rank Storrs light, realize basic frequency laser, single order this
Simultaneously in vibration intracavitary vibration, the pumping source, full-reverse lens, Nd-doped yttrium vanadate are brilliant for lentor light and second order of Stokes light
The longitudinal center line coincidence of body, Q-switch, middle eyeglass, bbo crystal, output optic acts and coupled lens is placed, and described BBO is brilliant
Body, which is arranged at, to be rotated horizontally on regulating platform.Pass through finely tune rotation place bbo crystal so that the optical direction of bbo crystal with it is corresponding
Phase matched angle needed for wavelength output is consistent, so as to select to realize that laser resonance intracavitary corresponds to fundamental frequency light or each rank Stokes
The mixing of light, the corresponding visible waveband laser for exporting different wave length.
It is that the high-reflecting film from 1.06 microns to 1.32 micron waveband laser is coated with the full-reverse lens further to set；In
Between be coated with from 1.06 microns to the anti-reflection film of 1.32 micron waveband laser and swash from 0.56 micron to 0.62 micron waveband on eyeglass
The high-reflecting film of light；Be coated with output optic acts from 1.06 microns to the high-reflecting film of 1.32 micron waveband laser and from 0.53 micron to
The high transmittance film of 0.66 micron waveband laser.
It is that the pumping source is the semiconductor laser that output wavelength is 808 nanometers or 880 nanometers further to set.
Further set is that the bbo crystal light pass surface is that light pass surface vertical direction is into 20 ° to 23 ° with bbo crystal Z axis
Angle cutting form.
Further setting is that the anglec of rotation of horizontal rotation regulating platform is positive and negative 3 degree.
It is that the Q-switch is to 1.06 microns of acousto-optic Q-switchings to 1.32 micron waveband high transmittances further to set.
By using above-mentioned technical proposal, under pumping source effect, Nd-doped yttrium vanadate crystal is in full-reverse lens and outgoing mirror
The intracavitary of piece composition forms the fundamental frequency light of 1.06 micron wavebands, and constantly vibration is strengthened；When fundamental frequency luminous intensity reaches neodymium-doped vanadium
During the Raman switching threshold of sour yttrium crystal, the fundamental frequency light of the micron waveband of part 1.06 produces 1.18 microns by a Raman frequency shift
The single order stokes light of wave band, while vibrate and strengthen in the intracavitary that full-reverse lens and output optic acts form；When 1.18 micron waves
When the intensity of the single order stokes light of section reaches the Raman switching threshold of Nd-doped yttrium vanadate crystal, the micron waveband of part 1.18
Single order stokes light produces the second order of Stokes light of 1.31 micron wavebands again by Raman frequency shift, also in full-reverse lens and
The intracavitary vibration of output optic acts composition is strengthened.So full-reverse lens and output optic acts form intracavitary can there is 1.06 simultaneously
The second order of Stokes light of the fundamental frequency light of micron waveband, the single order stokes light of 1.18 micron wavebands and 1.31 micron wavebands.Q
Switch is mainly used to realize that adjusting Q pulse laser operates, and improves intracavitary fundamental frequency light and the one, peak power of second order of Stokes light.
Table 1 gives the corresponding bbo crystal matching angle of each wavelength mixing that theoretical calculation obtains, and the matching angle is exactly to realize " wavelength
Laser freuqency doubling or during with frequency in combination ", optical direction is corresponding with crystal Z axis angle to be worth.Vibrate the laser of each wavelength of intracavitary
By the angle for finely tuning bbo crystal so that optical direction is corresponding with " BBO matches angle " value in table 1 with crystal Z axis angle, i.e.,
Between achievable different wave length and frequency or respective frequency multiplication, so as to realize into table 1 the visible of " output wavelength " corresponding wavelength
The conversion of wave band of laser, middle eyeglass be used for reflect opposite direction transmission visible waveband laser, final visible waveband laser all by
Output optic acts exports.Output optic acts exports visible waveband laser and realized by Lens Coupling to optical fiber, then by optical fiber output
Medical applications.
The corresponding bbo crystal matching angle of 1 each wavelength of table mixing
The utility model has the advantages that：Compared with prior art, the utility model structure setting is more reasonable, whole body
The middle one piece of Nd-doped yttrium vanadate crystal used while laser crystal and Raman crystal are used as, the one piece of bbo crystal only used in addition
The mixing that can be achieved between different wave length exports different visible waveband laser.Reasonable in design, required optical element is less,
Cost can be substantially reduced, the stability of a system is good, easy to operate.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, before creative labor is not paid
Put, obtaining other accompanying drawings according to these accompanying drawings still falls within category of the present utility model.
Fig. 1；The utility model embodiment light path principle figure；
In figure, pumping source 1, full-reverse lens 2, Nd-doped yttrium vanadate crystal 3, Q-switch 4, middle eyeglass 5, bbo crystal 6, level
Rotate regulating platform 7, output optic acts 8, coupled lens 9 and optical fiber 10.
Embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type is described in further detail.
The direction and position term that the utility model is previously mentioned, for example, " on ", " under ", "front", "rear", "left", "right", "
It is interior ", " outer ", " top ", " bottom ", " side " etc., be only refer to the attached drawing direction or position.Therefore, the direction and position used
It is to illustrate and understand the utility model to put term, rather than the limitation to scope of protection of the utility model.
As shown in figure 1, in the utility model embodiment, including body, be disposed with the body pumping source 1,
Full-reverse lens 2, Nd-doped yttrium vanadate crystal 3, Q-switch 4, middle eyeglass 5, bbo crystal 6, output optic acts 8, coupled lens 9 and optical fiber
10, the full-reverse lens 2 constitute the vibration chamber of fundamental frequency light and each rank Storrs light with output optic acts 8, realize basic frequency laser, one
Rank stokes light and second order of Stokes light be coated with simultaneously in vibration intracavitary vibration, described in the present embodiment in full-reverse lens 2 from
1.06 microns of high-reflecting films to 1.32 micron waveband laser；It is coated with from 1.06 microns to 1.32 micron wavebands and swashs on middle eyeglass 5
The anti-reflection film of light and from 0.56 micron to the high-reflecting film of 0.62 micron waveband laser；Be coated with output optic acts 8 from 1.06 microns to
The high-reflecting film of 1.32 micron waveband laser and from 0.53 micron to the high transmittance film of 0.66 micron waveband laser.
In addition, pumping source 1 described in the present embodiment, full-reverse lens 2, Nd-doped yttrium vanadate crystal 3, Q-switch 4, middle eyeglass 5,
The longitudinal center line of bbo crystal 6, output optic acts 8 and coupled lens 9, which overlaps, to be placed, and described bbo crystal 6 is arranged at horizontal rotation
Turn on regulating platform 7.Horizontal rotation regulating platform described in the present embodiment is realized using the mode of motor and decelerator driving rotating disc
Rotary fine adjustment, also can be directly from market purchasing, and it is this area mature technology.Preferably, the rotation of regulating platform 7 is rotated horizontally
Gyration is positive and negative 3 degree.
In addition, described bbo crystal 6 is to be have Fujian Inst. of Matter Structure, Chinese Academy of Sciences pioneering a kind of new non-
Linear crystal, its structure are β-BaB2O4, the crystal has larger nonlinear factor（Its nonlinear factor d11 is about KDPd36
4 times）, there is very high light injury threshold, the nonlinear frequency conversion performance from ultraviolet to middle in infra-red range is very good.This
The light pass surface of bbo crystal 6 described in embodiment be light pass surface vertical direction be with bbo crystal Z axis into 20 ° to 23 ° angle cutting and
Into.
In addition, pumping source 1 described in the present embodiment is the semiconductor laser that output wavelength is 808 nanometers or 880 nanometers,
Can be directly from market purchasing application, Q-switch described in the present embodiment is to 1.06 microns of sound to 1.32 micron waveband high transmittances
Light Q-switch.
Above disclosed is only the utility model preferred embodiment, can not limit the utility model with this certainly
Interest field, therefore equivalent variations made according to the utility model claims still belong to the scope that the utility model is covered.
Claims (6)
- A kind of 1. optional laser of visible waveband multi-wavelength, it is characterised in that：Including body, pump is disposed with the body Pu source, full-reverse lens, Nd-doped yttrium vanadate crystal, Q-switch, middle eyeglass, bbo crystal, output optic acts, coupled lens and optical fiber, The full-reverse lens and output optic acts constitute the vibration chamber of fundamental frequency light and each rank Storrs light, realize basic frequency laser, single order this Simultaneously in vibration intracavitary vibration, the pumping source, full-reverse lens, Nd-doped yttrium vanadate are brilliant for lentor light and second order of Stokes light The longitudinal center line coincidence of body, Q-switch, middle eyeglass, bbo crystal, output optic acts and coupled lens is placed, and described BBO is brilliant Body, which is arranged at, to be rotated horizontally on regulating platform.
- A kind of 2. optional laser of visible waveband multi-wavelength according to claim 1, it is characterised in that：The full-reverse lens On be coated with high-reflecting film from 1.06 microns to 1.32 micron waveband laser；It is coated with middle eyeglass from 1.06 microns to 1.32 microns The anti-reflection film of wave band of laser and from 0.56 micron to the high-reflecting film of 0.62 micron waveband laser；It is coated with output optic acts micro- from 1.06 Rice is to the high-reflecting film of 1.32 micron waveband laser and from 0.53 micron to the high transmittance film of 0.66 micron waveband laser.
- A kind of 3. optional laser of visible waveband multi-wavelength according to claim 1, it is characterised in that：The pumping source is Output wavelength is 808 nanometers or 880 nanometers of semiconductor laser.
- A kind of 4. optional laser of visible waveband multi-wavelength according to claim 1, it is characterised in that：The bbo crystal Light pass surface is that light pass surface vertical direction is to be formed with angle cutting of the bbo crystal Z axis into 20 ° to 23 °.
- A kind of 5. optional laser of visible waveband multi-wavelength according to claim 4, it is characterised in that：Rotate horizontally regulation The anglec of rotation of platform is positive and negative 3 degree.
- A kind of 6. optional laser of visible waveband multi-wavelength according to claim 1, it is characterised in that：The Q-switch is To 1.06 microns of acousto-optic Q-switchings to 1.32 micron waveband high transmittances.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720527685.4U CN206789869U (en) | 2017-05-12 | 2017-05-12 | A kind of optional laser of visible waveband multi-wavelength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720527685.4U CN206789869U (en) | 2017-05-12 | 2017-05-12 | A kind of optional laser of visible waveband multi-wavelength |
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| Publication Number | Publication Date |
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| CN206789869U true CN206789869U (en) | 2017-12-22 |
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| CN201720527685.4U Expired - Fee Related CN206789869U (en) | 2017-05-12 | 2017-05-12 | A kind of optional laser of visible waveband multi-wavelength |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069395A (en) * | 2017-05-12 | 2017-08-18 | 温州大学 | A kind of optional laser eyeground therapeutic equipment of multi-wavelength |
-
2017
- 2017-05-12 CN CN201720527685.4U patent/CN206789869U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069395A (en) * | 2017-05-12 | 2017-08-18 | 温州大学 | A kind of optional laser eyeground therapeutic equipment of multi-wavelength |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171222 Termination date: 20200512 |
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| CF01 | Termination of patent right due to non-payment of annual fee |