阅读说明：本技术 基于双掺杂晶体的全固态黄光激光器 (All-solid-state yellow laser based on codope crystal ) 是由 高静 李长磊 姚文明 田玉冰 *** 邓力华 檀慧明 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种基于双掺杂晶体的全固态黄光激光器,包括：泵浦系统和谐振腔,泵浦系统包括两个半导体激光器、两个光束整形模块、偏振合束模块和聚焦透镜模块；所述双掺杂激光增益介质包括Dy<Sup>3+</Sup>掺杂的氧化物基质以及辅助掺杂离子。本发明利用Dy<Sup>3+</Sup>中<Sup>4</Sup>F<Sub>9/2</Sub>→<Sup>6</Sup>H<Sub>13/2</Sub>的受激辐射直接产生黄光激光,无需非线性频率变换过程,从根本上解决了目前全固态黄光激光结构复杂的问题；本发明的激光介质采用双掺杂的氧化物晶体,通过多声子弛豫的方式加速<Sup>6</Sup>H<Sub>13/2</Sub>能级的粒子数消耗；共掺杂离子(Tb<Sup>3+</Sup>/Eu<Sup>3+</Sup>)的引入实现激光下能级的能量转移,减小<Sup>6</Sup>H<Sub>13/2</Sub>的能级寿命,实现了粒子数的快速反转,提高了黄光激光输出的稳定性。(The invention discloses a kind of all-solid-state yellow lasers based on codope crystal, comprising: pumping system resonant cavity, pumping system include two semiconductor lasers, two light beam shaping modules, polarization coupling module and condenser lens module；The codope laser gain medium includes Dy 3+ The matrix of oxide and supplementary doping ion of doping.The present invention utilizes Dy 3+ In 4 F 9/2 → 6 H 13/2 Stimulated radiation directly generate yellow light laser, be not necessarily to nonlinear frequency transformation process, fundamentally solve the problems, such as that current all-solid-state yellow laser structure is complicated；Laser medium of the invention uses the oxide crystal of codope, is accelerated by way of multi-phonon relaxation 6 H 13/2 The population of energy level consumes；Co-dopant ions (Tb 3+ /Eu 3+ ) introducing realize laser lower level energy transfer, reduce 6 H 13/2 The life time of the level, realize the quick reversion of population, improve yellow light laser output stability.)

1. a kind of all-solid-state yellow laser based on codope crystal characterized by comprising

Pumping system comprising two models are identical for issuing the semiconductor of the two mutually perpendicular pump lights in beam polarization direction Laser, be located at described two semiconductor lasers output end two light beam shaping modules, for by two beams polarize The mutually perpendicular pump light in direction close the polarization coupling module and condenser lens module of beam；

Resonant cavity, positioned at it is described focus coupled lens output end comprising resonant cavity front cavity mirror, codope laser gain be situated between Matter, resonant cavity output coupling mirror and optical filter；

The codope laser gain medium includes Dy³⁺The matrix of oxide and supplementary doping ion of doping；

After the codope laser gain medium absorbs pump light, Dy³⁺In be in ground state⁶H_15/2Electronics induced transition extremely⁴I_15/2 Energy level, subsequent radiationless ground relaxation to metastable energy level⁴F_9/2, occur in resonant cavity⁴F_9/2→⁶H_13/2Stimulated radiation amplification, Yellow light laser is generated, is successively exported after the resonant cavity output coupling mirror and optical filter.

2. the all-solid-state yellow laser according to claim 1 based on codope crystal, which is characterized in that described double-doped The matrix of miscellaneous laser gain medium is Y₃Sc₂Ga₃O₁₂。

3. the all-solid-state yellow laser according to claim 1 based on codope crystal, which is characterized in that described double-doped The matrix of miscellaneous laser gain medium is GdScO₃。

4. the all-solid-state yellow laser according to claim 2 or 3 based on codope crystal, which is characterized in that described The main Doped ions of codope laser gain medium are Dy³⁺, concentration is 0.1%~10%；The auxiliary Doped ions are Tb³⁺, dense Degree is 0.1%~20%.

5. the all-solid-state yellow laser according to claim 2 or 3 based on codope crystal, which is characterized in that described The main Doped ions of codope laser gain medium are Dy³⁺, concentration is 0.1%~10%；The auxiliary Doped ions are Eu³⁺, dense Degree is 0.1%~20%.

6. the all-solid-state yellow laser based on codope crystal described in any one of -5 according to claim 1, feature It is, the wavelength for the pump light that described two semiconductor lasers issue is 400~500nm.

7. the all-solid-state yellow laser based on codope crystal described in any one of -5 according to claim 1, feature It is, described two light beam shaping modules are prism pair or cylindrical mirror pair.

8. the all-solid-state yellow laser based on codope crystal described in any one of -5 according to claim 1, feature It is, the polarization coupling module is polarization splitting prism, and the two beams pumping light polarization direction before closing beam is orthogonal, Yi Shuwei P polarization, another beam are S-polarization.

9. the all-solid-state yellow laser based on codope crystal described in any one of -5 according to claim 1, feature It is, the condenser lens module is a piece of simple lens or a piece of non-spherical lens.

10. the all-solid-state yellow laser based on codope crystal described in any one of -5 according to claim 1, feature It is, the front and rear surfaces of the codope laser gain medium are plated with the anti-reflection film system to oscillation light；The codope laser The front surface of gain media is coated with to the antireflective membrane system of pump light, and rear surface is coated with the high reflectivity film stack to pump light.

Technical field

The present invention relates to field of biomedicine, in particular to a kind of all-solid-state yellow laser based on codope crystal.

Background technique

All-solid-state yellow laser Biomedical Instruments, optical storage, accurate measurement, illumination display, etc. fields have Important function.Especially in bioanalysis and clinical treatment, yellow light laser is the exciting light of fluorescent dye, has become streaming at present Cell instrument and the microscopical standard configuration light source of super-resolution；Hemoglobin has very strong absorption peak in yellow band, in capillary It is played an important role in the clinical treatment of expansion and macula retinae lesion.Therefore, efficient, stable yellow light laser is obtained With important research significance and application value.

Dye laser can directly generate yellow light, be the main method for early stage obtaining yellow light laser.But its dyestuff easily moves back The disadvantages of change, low efficiency, poor safety, constrains the development of dye laser.The main of all-solid-state yellow laser is obtained at present Method has: (1) dual wavelength and frequency: utilizing and frequency crystal (LBO/KTP) realizes that 1064nm and 1300nm's and frequency are exported；(2) red Outer frequency multiplication: by the way that the reasonable plated film of Nd:YAG crystal, combined standard has the fundamental frequency light that transmission principle obtains 1112nm~1123nm, Frequency multiplication realizes yellow light output again；(3) Ramar laser: being based on stimulated raman scattering, gain is larger and be easy to get Wavelength (such as 1064nm) frequency displacement is between 1100~1200nm, then passes through the output that frequency multiplication obtains yellow light.The above method is all It is by nonlinear frequency transformation, by the wavelength convert easily obtained at yellow light, but to the more demanding of fundamental frequency light, transfer efficiency Low, structure is complicated for laser.

Rare earth ion Dy³⁺'s⁴F_9/2→⁶H_13/2Energy level transition can produce the fluorescence of 580nm, be to directly obtain yellow light at present The most potential material of laser.But due to Dy³⁺Ion have the particle of lower stimulated emission cross section and laser lower level without Promptly relaxation leads to single doping Dy to ground state to method³⁺Yellow light laser output power it is smaller, cannot achieve the company of efficient stable Reforwarding turns.

Summary of the invention

In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that reducing Dy³⁺In⁶H_13/2's The life time of the level to improve the stability that laser exports, obtains the all-solid-state yellow laser of 578~585nm high stability；This hair It is bright that a kind of all-solid-state yellow laser based on codope crystal is provided.

The technical solution adopted by the present invention is that: a kind of all-solid-state yellow laser based on codope crystal, comprising:

Pumping system comprising two models are identical for issuing the half of the two mutually perpendicular pump lights in beam polarization direction Conductor laser, be located at described two semiconductor lasers output end two light beam shaping modules, for by two beams The mutually perpendicular pump light in polarization direction close the polarization coupling module and condenser lens module of beam；

Resonant cavity, positioned at it is described focus coupled lens output end comprising resonant cavity front cavity mirror, codope laser increase Beneficial medium, resonant cavity output coupling mirror and optical filter；

The codope laser gain medium includes Dy³⁺The matrix of oxide and supplementary doping ion of doping；

After the codope laser gain medium absorbs pump light, Dy³⁺In be in ground state⁶H_15/2Electronics induced transition extremely⁴I_15/2Energy level, subsequent radiationless ground relaxation to metastable energy level⁴F_9/2, occur in resonant cavity⁴F_9/2→⁶H_13/2Stimulated radiation Amplification generates yellow light laser, successively exports after the resonant cavity output coupling mirror and optical filter.

Preferably, the matrix of the codope laser gain medium is Y₃Sc₂Ga₃O₁₂。

Preferably, the matrix of the codope laser gain medium is GdScO₃。

Preferably, the main Doped ions of the codope laser gain medium are Dy³⁺, concentration is 0.1%~10%；Institute Stating auxiliary Doped ions is Tb³⁺, concentration is 0.1%~20%.

Preferably, the main Doped ions of the codope laser gain medium are Dy³⁺, concentration is 0.1%~10%；Institute Stating auxiliary Doped ions is Eu³⁺, concentration is 0.1%~20%.

Preferably, the wavelength for the pump light that described two semiconductor lasers issue is 400~500nm.

Preferably, described two light beam shaping modules are prism pair or cylindrical mirror pair.

Preferably, the polarization coupling module is polarization splitting prism, and the two beams pumping light polarization direction before closing beam is mutual Perpendicular, a branch of is P polarization, and another beam is S-polarization.

Preferably, the condenser lens module is a piece of simple lens or a piece of non-spherical lens.

Preferably, the front and rear surfaces of the codope laser gain medium are plated with the anti-reflection film system to oscillation light；Institute The front surface for stating codope laser gain medium is coated with to the antireflective membrane system of pump light, and rear surface is coated with the high-reflecting film to pump light System.

The beneficial effects of the present invention are:

(1) present invention utilizes Dy³⁺In⁴F_9/2→⁶H_13/2Stimulated radiation directly generate yellow light laser, be not necessarily to non-linear frequency Conversion process fundamentally solves the problems, such as that current all-solid-state yellow laser structure is complicated；

(2) laser medium of the invention uses the oxide crystal of codope, is made with the oxide with high phonon energy For doped substrate, accelerated by way of multi-phonon relaxation⁶H_13/2The population of energy level consumes；Meanwhile co-dopant ions (Tb³⁺/ Eu³⁺) introducing realize laser lower level energy transfer, reduce⁶H_13/2The life time of the level, realize the quick anti-of population Turn, improves the stability of yellow light laser output.

Detailed description of the invention

Fig. 1 is Dy³⁺With Tb³⁺The level structure schematic diagram of ion codope crystal, ET1 is Dy in figure³⁺'s⁶H_13/2Energy level with Tb³⁺'s⁷F₄The Resonance energy transfer that energy level occurs；

Fig. 2 is Dy³⁺With Eu³⁺The level structure schematic diagram of ion codope crystal, ET2 is Dy in figure³⁺'s⁶H_13/2Energy level with Eu³⁺'s⁷F₅The Resonance energy transfer that energy level occurs；

Fig. 3 is the structural schematic diagram of the all-solid-state yellow laser of the invention based on codope crystal.

Description of symbols: 1. semiconductor laser LD1,2. first light beam shaping modules, 3. semiconductor laser LD2, 4. the second light beam shaping module, 5. polarization coupling modules, 6. condenser lens modules, 7. resonant cavity front cavity mirrors, 8. laser gains are situated between Matter, 9. resonant cavity output coupling mirrors, 10. optical filters, 11. pumping systems, 12. resonant cavities.

Specific embodiment

The present invention will be further described in detail below with reference to the embodiments, to enable those skilled in the art referring to specification Text can be implemented accordingly.

It should be appreciated that such as " having ", "comprising" and " comprising " term used herein are not precluded one or more The presence or addition of a other elements or combinations thereof.

As shown in Figure 1-3, a kind of all-solid-state yellow laser based on codope crystal of the present embodiment, including pumping system It unites 11 resonant cavities 12.

Pumping system 11 comprising two models are identical for issuing the two mutually perpendicular pump lights in beam polarization direction Semiconductor laser, be located at two semiconductor lasers output end two light beam shaping modules, for by two beams it is inclined The vibration mutually perpendicular pump light in direction close the polarization coupling module 5 and condenser lens module 6 of beam.

Two semiconductor laser models are identical and output is mutually perpendicular polarised light, wherein 1 water of semiconductor laser Placing flat, i.e. P polarization, semiconductor laser 2 are disposed vertically, i.e. S-polarization.

Resonant cavity 12, positioned at focus coupled lens output end comprising resonant cavity front cavity mirror 7, codope laser increase Beneficial medium 8, resonant cavity output coupling mirror 9 and optical filter 10；Codope laser gain medium 8 includes Dy³⁺The oxide-base of doping Matter and supplementary doping ion.

After codope laser gain medium 8 absorbs pump light, Dy³⁺In be in ground state⁶H_15/2Electronics induced transition extremely⁴I_15/2Energy level, subsequent radiationless ground relaxation to metastable energy level⁴F_9/2, occur in resonant cavity 12⁴F_9/2→⁶H_13/2Be excited spoke Amplification is penetrated, the output of yellow light laser is obtained at output coupling mirror.

Wherein, the matrix of codope laser gain medium 8 is Y₃Sc₂Ga₃O₁₂(YSGG) or GdScO₃(GSO).It is main adulterate from Son is Dy³⁺, concentration is 0.1%~10%；Auxiliary Doped ions are Tb³⁺Or Eu³⁺, concentration is 0.1%~20%.

Wherein, optical filter 10 selects the optical filter 10 of 578~585nm wave band.

Wherein, two light beam shaping modules are prism pair or cylindrical mirror pair.Condenser lens module 6 be a piece of simple lens or A piece of non-spherical lens.

Two light beam shaping modules (the first light beam shaping module 2 and the second light beam shaping module 4) are led to two and half respectively The light that body laser issues carries out beam shaping, realizes hot spot sphering, then exports to polarization coupling module 5 and carry out conjunction beam, closes Pump light after beam converges to the laser gain medium 8 of codope by condenser lens module 6；Codope laser gain medium 8 After absorbing pump light, vibrated in resonant cavity 12, oscillation light is formed by 7 resonant cavity output coupling mirror 9 of resonant cavity front cavity mirror Resonant cavity 12 in amplified by feedback, until form stable oscillation stationary vibration and export yellow light laser, yellow light laser using 578~ The optical filter 10 of 585nm wave band exports after filtering out pump light remaining in output beam.

Embodiment as one preferred, the wavelength for the pump light that two semiconductor lasers issue is 400~ 500nm。

Embodiment as one preferred, resonant cavity front cavity mirror 7 are plane mirror, and left side is coated with to pumping light transmission rate Anti-reflection film greater than 95%, right side are coated with the high-reflecting film to oscillation light reflectivity greater than 99.8%；

8 left side of laser gain medium of embodiment as one preferred, codope is coated with to pump light and oscillation light High saturating membrane system, right side are coated with to the high saturating membrane system of oscillation light (namely yellow light)；Resonant cavity output coupling mirror 9 is concave mirror, Its left side be coated with it is anti-reflection to pump light, to oscillation yellow part penetrate membrane system, to oscillation yellow light output transmitance 0.1% ~20%, the radius of curvature of output coupling mirror is 50~200mm.