CN103606810B - A kind of pump light many journeys transmission system and disc piece solid laser - Google Patents
A kind of pump light many journeys transmission system and disc piece solid laser Download PDFInfo
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- CN103606810B CN103606810B CN201310500091.0A CN201310500091A CN103606810B CN 103606810 B CN103606810 B CN 103606810B CN 201310500091 A CN201310500091 A CN 201310500091A CN 103606810 B CN103606810 B CN 103606810B
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Abstract
The invention discloses a kind of pump light many journeys transmission system and disc piece solid laser.Pump light many journeys transmission system comprises first, second parabolic reflector, corner cube mirror, video disc laser crystal and correction mirror, first, second parabolic reflector conjugation is arranged, first parabolic reflector height is lower, its surface is provided with pump light entrance aperture, its center hollow out is also provided with the video disc laser crystal of adjustable angle, corner cube mirror is provided with above it, the video disc laser crystal back side is coated with the film that is all-trans, front is coated with high transmittance film, the right-angle surface of corner cube mirror is towards the second parabolic reflector, second parabolic reflector center hollow out, be provided with the correction mirror of adjustable angle, its surface is provided with laser emitting hole.Disc piece solid laser comprises described pump light transmission system and V-type laserresonator.Pump spot of the present invention is evenly distributed, thermal distoftion and thermal lensing effect little, realize the Laser output of high power, high efficiency, high light beam quality when not increasing volume.
Description
Technical field
The invention belongs to laser technology field, more specifically, relate to a kind of solid video disc laser pump light many journeys transmission system and disc piece solid laser.
Background technology
Disc piece solid laser belongs to one of a kind of high-end high power solid state laser.The essential distinction of it and traditional solid state laser is just the shape of working-laser material, and video disc laser changes traditional rhabdolith into video disc crystal.The thickness of crystal is 0.2mm ~ 0.4mm, and pump light is incident from crystal front, and cooling realizes at the crystal back side, because crystal is very thin, radius-thickness ratio is comparatively large, therefore crystal good cooling results, is conducive to the Laser output obtaining high conversion efficiency, high-average power and high light beam quality.
Keeping under the condition that pump power density is constant, realizing video disc laser height Laser output has two kinds of methods: one is the area increasing pump spot, and two is the numbers increasing video disc serial connection.Due to spontaneous radiation enlarge-effect (AmplifiedSpontaneousEmission, ASE) restriction, the method increasing pump spot area cannot improve Output of laser energy further.Therefore in order to improve power output and the conversion efficiency of disc piece solid laser, pump light many journeys transmission technology becomes the utilance improving pump light, realizes the core technology of high light beam quality, high conversion efficiency Laser output.Publication number be CN101414728A patent document discloses a kind of pump light many journeys transmission plan based on asymmetric conjugate Double parabolic curvature reflecting mirror, realize the repeatedly transmission of pump spot, thus improve conversion efficiency and average power, obtain high-quality Laser output.
But this pump light many journeys transmission system, there are three major defects when high power operation:
The first, hot spot comparatively disperses in paraboloidal mirror surface distributed, parabola effective area utilance is lower, parabolic reflector is heated uneven, when high power operation, type distortion in face is serious, thus result through the thermal distoftion of the video disc laser crystal that pump light that parabolic reflector converges to video disc causes and thermal lensing effect quite serious, have impact on transfer ratio and the average power of system, limit the further raising of Output of laser quality.
If second, adopt this technical scheme to improve pumping number of times further, the conversion efficiency of increase system, only the paraboloidal bore of reliable increase realizes, the difficulty that the wide-angle reflection Film Design and plated film that cause parabolic mirror reflects rete are prepared by the increase of parabola bore increases, even cannot realize, index increases by the volume of simultaneity factor and the processing cost of aperture aspherical.Meanwhile, also by causing, to converge to away from the pump light at parabola center the pump spot distortion that video disc laser crystal is formed very serious to increase paraboloidal bore, and cause pump light uniformity to reduce, the beam quality of Output of laser and power will decline rapidly.
When three, adopting the embodiment of two-way pumping, unabsorbed pump light finally from the entrance aperture outgoing of correspondence, may burn pump light generator.
Summary of the invention
For above defect or the Improvement requirement of prior art, the invention provides a kind of solid state laser many journeys transmission system based on corner cube mirror and conjugation Double parabolic curvature reflecting mirror, its object is to the distribution of dispersion pump spot on paraboloidal mirror, make it more even, reduce pump light on parabola skewness and cause distortion institute cause the uneven of the pump spot of video disc laser crystal and thermal distoftion, improve output light beam quality; On the other hand, this scheme is on the basis that raising pump power is evenly distributed, make under the condition of same parabola bore, by making full use of parabolic reflector, solve existing scheme pumping number of times limited, cause the problem that the absorption efficiency of pump light is not high, the conversion efficiency of system is lower, thus improve the beam quality of Output of laser.
For achieving the above object, according to one aspect of the present invention, provide a kind of pump light many journeys transmission system, it is characterized in that, comprise: first, second parabolic reflector, corner cube mirror, video disc laser crystal and correction mirror, described first parabolic reflector and the second parabolic reflector conjugation are arranged, the height of described first parabolic reflector is lower than the second parabolic reflector, its surface is provided with pump light entrance aperture, its center hollow out is also provided with the video disc laser crystal of adjustable angle, corner cube mirror is provided with above it, the described video disc laser crystal back side is coated with the film that is all-trans, front is coated with high transmittance film, described corner cube mirror right-angle surface is towards the second parabolic reflector, the center hollow out of described second parabolic reflector is also provided with the correction mirror of adjustable angle, its surface is provided with laser emitting hole, pump light is incident from the pump light entrance aperture being positioned at the first parabolic reflector, enter the pump cavity be made up of first, second parabolic reflector and corner cube mirror, pump spot is made to drop on corner cube mirror through video disc laser crystal and correction mirror adjustment, produce spot displacement, pump light repeatedly forms repeatedly pumping through video disc laser crystal, and the laser that video disc laser crystal sends is from the laser emitting hole outgoing being positioned at the second parabolic reflector.
Preferably, described pump light many journeys transmission system, also comprises pump light completely reflecting mirror, and described pump light completely reflecting mirror is arranged on described first parabolic reflector, utilizes reversibility of optical path, again forms the many journey transmission of pump light.
Preferably, described pump light many journeys transmission system, its corner cube mirror has one or more.
Preferably, described pump light many journeys transmission system, its corner cube mirror is the eyeglass that is all-trans of right-angle reflecting prism or two form right angles.
Preferably, described pump light many journeys transmission system, its pump light entrance aperture has one or more.
According to another aspect of the present invention, provide a kind of disc piece solid laser, comprise described pumping many journeys optical transmission system and V-type laserresonator, pump light through collimation enters pump light many journeys transmission system through pump light entrance aperture, video disc laser crystal in described many journeys transmission system is through repeatedly pumping, the laser produced is undertaken vibrating, amplifying by V-type laserresonator, realizes stable superlaser and exports.
In general, the above technical scheme conceived by the present invention compared with prior art, can obtain following beneficial effect:
(1) design of parabolic reflector group adopting conjugation to arrange, reduce the requirement of collimation property to pumping and light spot shape, the design difficulty of pump light colimated light system is minimized, and the injecting power of pump light is higher.
(2) by video disc laser crystal and the Angle ambiguity of correction mirror and the setting position of corner cube mirror and pump light total reflective mirror, make pump light be able to multiple reflections in two parabolic reflectors, improve the utilization ratio to pump light.
(3) adopt the design of dual paraboloid differing heights, above the first parabolic reflector, arrange corner cube mirror, corner cube mirror coordinates conjugation dual paraboloid reflecting system, makes hot spot produce displacement.Spot displacement creates multiple benefit effects: one, under the prerequisite not increasing conjugation parabolic reflector mirror area, avoid pump light from entrance port outgoing, the order of reflection of pump light in conjugation parabolic reflector is made to increase at least one times, parabolic reflector is obtained utilize more fully, the absorption efficiency of pump light increases substantially; Its two, to make on parabolic reflector pump spot distribution more even, thus reduce the thermal distoftion of parabolic reflector, the uniformity of raising video disc pump light hot spot; Its three, avoid pump light to project pump light generator by entrance port, pump light projects on pump light generator, may burn pump light generator, cause accidental loss.In a word, corner cube mirror be provided with the Laser output being beneficial to and realizing high power, high efficiency, high light beam quality.
(4) due to pump light many journeys transmission system provided by the invention, utilize fully conjugation Double parabolic curvature reflecting mirror, therefore equipment volume is little, and mechanical structure is simple with adjustment, lighter weight, and cost significantly reduces, be suitable for commercial Application.
(5) solid video disc laser provided by the invention, owing to applying described pump light many journeys transmission system, significantly improve pumping number of times, pump light utilance significantly improves, the uniformity of pump spot have also been obtained raising, can obtain the output of high light beam quality laser.
Preferred version, adopts pump light total reflective mirror coordinate corner cube mirror or adopt multiple corner cube mirror to cooperatively interact, can improve pump light order of reflection in conjugation parabolic reflector further, thus improve the energy of shoot laser further.
Preferred version adopts multiple corner cube mirror to cooperatively interact, and can disperse hot spot further, avoids thermal distoftion effect to greatest extent.
Accompanying drawing explanation
Fig. 1 is pump light many journeys transmission system and the disc piece solid laser structural representation of embodiment 1;
Fig. 2 is embodiment 1 pumping light path front view;
Fig. 3 is embodiment 1 pumping light path vertical view;
Fig. 4 is that in embodiment 1, on parabolic reflector, hot spot moves schematic diagram;
Fig. 5 is pump light many journeys transmission system and the disc piece solid laser structural representation of embodiment 2;
Fig. 6 is embodiment 2 pumping light path front view;
Fig. 7 is embodiment 2 pumping light path vertical view;
Fig. 8 is that in embodiment 2, on parabolic reflector, hot spot moves schematic diagram;
Fig. 9 is pump light many journeys transmission system and the laser structure schematic diagram of embodiment 3;
Figure 10 is embodiment 3 pumping light path front view;
Figure 11 is embodiment 3 pumping light path vertical view;
Figure 12 is that in embodiment 3, on parabolic reflector, hot spot moves schematic diagram.
In all of the figs, identical Reference numeral is used for representing identical element or structure, wherein: 1 is the first parabolic reflector, and 2 is the second parabolic reflector, 3 is incident pump light, 4 is video disc laser crystal, and 5 is correction mirror, and 6 is corner cube mirror, 7 is pump light total reflective mirror, 8 is laser total reflective mirror, and 9 is laser semi-reflective mirror, and 10 is pump light entrance aperture.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.In addition, if below in described each execution mode of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
One aspect of the present invention provide a kind of based on corner cube mirror and conjugation dual paraboloid to pump light many journeys transmission system of speculum, comprise first, second parabolic reflector, corner cube mirror, video disc laser crystal and correction mirror.
Wherein, first, second parabolic reflector conjugation is arranged, refer to that the first parabolic reflector is identical with the face type function of the second parabolic reflector, and the focus of the first parabolic reflector is positioned at the center of the second parabolic reflector, and the focus of the second parabolic reflector is positioned at the center of the first parabolic reflector.Pump cavity is formed between first, second parabolic reflector.Two surperficial highly reflecting films be all coated with pump light of parabolic reflector.The height of aspect ratio second parabolic reflector of the first parabolic reflector is low, makes light beam translation corner cube mirror and reflecting element for placing.Parabolic reflector is provided with pump light entrance aperture, and pump light enters many journeys transmission system through entrance aperture.Pump light entrance aperture is preferably arranged on the first parabolic reflector, arranges many once through video disc laser crystal compared with the second parabolic reflector setting into perforation pump light like this.Parabolic reflector is hollow out at its center.First parabolic reflector center hollow part arranges video disc laser crystal, thickness is 0.2mm ~ 0.4mm, and the material of video disc laser crystal can be the laser materials such as Yb:YAG (mixing ytterbium yttrium-aluminium-garnet) or Nd:YAG (neodymium-doped yttrium-aluminum garnet).The one side of its pump light incidence of video disc laser crystal is front, another side is the back side, namely its back side is coated with to be all-trans film to the high anti-rete of pump light and Output of laser, front is coated with the high saturating rete of pump light and Output of laser and high transmittance film, in the focus that video disc laser crystal is placed on the second parabolic reflector or suitably out of focus.When video disc laser crystal is installed there is certain angle β (0≤β < π/4) in its normal and z-axis.Second parabolic reflector center hollow part arranges correction mirror, and correction mirror can be level crossing also can for spherical mirror, and mirror surface can be plated pump light and to be all-trans film.Correction mirror is arranged in the second parabolic reflector center i.e. focus of the first parabolic reflector or suitable out of focus, and when correction mirror is installed, its normal and z-axis exist certain angle α (0≤α < π/4, and α ≠ β).The height of the first parabolic reflector is lower than the second parabolic reflector, corner cube mirror is arranged at above the first parabolic reflector, corner cube mirror can be a right-angle reflecting prism, also can be the eyeglass composition that is all-trans of two form right angles, reflecting surface plates pump light equally and to be all-trans film, reflected in parallel effect after a certain amount of lateral shift is carried out to the pump light do not absorbed, again got back in conjugation parabolic reflector mirror system by the pump light that corner cube mirror reflects and pumping is carried out to video disc, thus improve the order of reflection of pump light, the pumping number of times of video disc laser crystal be have also been obtained and significantly improve, conjugation parabola will improve the utilization ratio of speculum simultaneously.The more important thing is because pump light creates transverse translation, the hot spot on parabolic reflector is disperseed significantly to reduce thermal distoftion and thermal lensing effect, avoids pump light from entrance aperture outgoing, even projects on pump light generator.Second parabolic reflector surface is provided with laser emitting hole.
Preferred version, arranges pump light total reflective mirror at the opposite side of the first parabolic reflector, is returned by the pump light finally do not absorbed, thus realize the double of pumping number of times along original optical path.
Preferred version, another one corner cube mirror is set at the opposite side of the first parabolic reflector, not only makes the pump light do not absorbed return conjugation Double parabolic curvature reflecting mirror, realize pumping number of times double further, hot spot can also be disperseed further simultaneously, avoid thermal distoftion effect.
Apply the disc piece solid laser of many journeys transmission system provided by the invention, comprise described pump light many journeys transmission system and V-type laserresonator.Pump light through collimation enters pump light many journeys transmission system through pump light entrance aperture, video disc laser crystal in described many journeys transmission system is through repeatedly pumping, the laser produced is undertaken vibrating, amplifying by V-type laserresonator, realizes stable superlaser and exports.V-type resonant cavity is made up of laser total reflective mirror and laser output mirror, and wherein laser total reflective mirror reflecting surface can be coated with laser and to be all-trans film, and laser output mirror reflecting surface can be coated with the semi-transparent semi-reflecting film of laser.
Be below embodiment:
Embodiment 1
Pump light many journeys transmission system, as shown in Figure 1.Its first parabolic reflector 1 and the second parabolic reflector 2 one-tenth conjugation are placed, and namely the focus of the first parabolic reflector 1 is in the center of the second parabolic reflector 2, and the focus of the second parabolic reflector 2 is in the center of the first parabolic reflector 1.First parabolic reflector is provided with pump light entrance aperture 10.The height of the first parabolic reflector 1 is lower than the second parabolic reflector 2, and difference in height to be all-trans eyeglass 6 and pump light total reflective mirror 7 for placing form right angle.Corner cube mirror 6 and pump light total reflective mirror 7 are positioned over the both sides, top of the first parabolic reflector 1, and the right-angle surface of corner cube mirror 6, towards the second parabolic reflector, is used for realizing 180 degree of reflections after the lateral shift of incident light.The center of the first and second parabolic reflectors all needs to carry out hollow out, the center of the first parabolic reflector 1 is for placing video disc laser crystal 4, when video disc laser crystal 4 is installed there is certain angle β (0≤β < π/4) in its normal and z-axis, correction mirror 5 is placed in the center of the second parabolic reflector 2, when correction mirror 5 is installed there is certain angle α (0≤α < π/4, and α ≠ β) in its normal and z-axis.Wherein, α and β angle is all defined in yz plane, shows in fig. 2.
Pump light 3 after collimation to enter into from pump light entrance aperture 10 in the pump cavity that is made up of parabolic reflector 1 and 2.First pump light horizontal transport is to the second parabolic reflector 2 surface, focus place is focused on after being reflected, because parabolic reflector 1 and 2 is that conjugation is placed, so the focus of the second parabolic reflector 2 is the center of the first parabolic reflector 1, be place, video disc laser crystal 4 position, realize the first time pumping to video disc laser crystal 4, the front and back of video disc laser crystal 4 is coated with thoroughly high to pump light and that height is anti-film respectively, so pump light through after video disc laser crystal reflect by rear surface, the second parabolic reflector 2 surface is got back to after unabsorbed pump light reflection.Front view in fig. 2, due to the existence of video disc laser crystal 4 angle of inclination beta, reflected light back is to the distance of upwards having moved Δ Y1 during the second parabolic reflector 2, the size of side-play amount is controlled by angle β, this light by the second parabolic mirror surface 2 reflect rear parallel incide first parabolic mirror surface 1 surface, and focus on the focus place of the first parabolic reflector 1, it is just in time the central hole of the second parabolic reflector 2, i.e. correction mirror 5, correction mirror 5 surface is coated with the film be all-trans to pump light, then, pump light is reflexed to the first parabolic reflector 1 surface by correction mirror 5, because correction mirror 5 also has the existence of inclination alpha, the pump light reflected is made to move Δ Y2, side-play amount is by | alpha-beta | and angle controls, complete the circulation of first time in two parabolic reflectors of pump light.Then start to circulate next time.As shown in Figure 2, when pump light second time reflexes on the first parabolic reflector 1, pump light reflection height upwards shifted by delta Y1 again, but now ray height has exceeded the height of the first parabolic reflector 1, pump light incides corner cube mirror 6, as shown in Figure 3, after incident pump light realizes the skew of horizontal Δ X size after corner cube mirror 6 reflects, reflected in parallel is gone back on the second parabolic reflector 2, through the second parabolic reflector 2 reflect focalization to video disc laser crystal 4 place, start the circulation of a new pump light.The distribution situation of pump spot on parabolic reflector 1 and 2 surface as shown in Figure 4.Can be as seen from Figure 4, corner cube mirror 6 makes flare all offset to the periphery, offset Δ X is by corner cube mirror 6 state modulator, after the pump light of translation carries out multiple reflections, parallel when inciding pump light total reflective mirror 7, remain unabsorbed pump light to be reflected original optical path by pump light total reflective mirror 7 and return, make pumping number of times double.
In order to more clear description hot spot is in the transmission characteristic of this transmission system, the pump spot on parabolic reflector 1 and 2 surface is numbered the direction and order that describe light transmission by Fig. 4, specifically describes as follows: e → q → 4 → t → h → 5 → f → r → 4 → s → g → i → u → 4 → p → d → 5 → j → v → 4 → o → c → 5 → k → w → 4 → n → b → 5 → v → l → x → 4 → m → a → m → 4 →... (original optical path returns).Can calculate from route map, in this pump light many journeys transmission system of go-no-go, by reasonably arranging the size of α and β angle, can realize pump light at the number of times through video disc laser crystal is 6*2=12 time, because pump light is reflected by the film that is all-trans that rear surface is plated when video disc laser crystal is inner, pump light has getted over 2 times at crystals, therefore to the pumping number of times of video disc laser crystal up to 12*2=24 time, substantially increase the absorption efficiency of video disc laser crystal to pump light.
Apply the disc piece solid laser of described many journeys transmission system, as shown in Figure 1.Placement two laser mirrors and video disc laser crystal 4 is also needed to form V-type resonant cavity in the second parabolic reflector periphery of many journeys transmission system, wherein 8 is laser total reflective mirror, and plated surface laser is all-trans film, and 9 is laser semi-reflective mirror, the semi-transparent semi-reflecting film of plated surface laser, for the output of laser.The center hollow part of the second parabolic reflector 2 will do slightly larger, as laser emitting hole, can cross arrive laser total reflective mirror 8 and laser semi-reflective mirror 9 by hollow part to make laser.
Because video disc laser crystal 4 is by pump light repeatedly pumping, just superlaser can be produced, wherein video disc laser crystal 4 and laser total reflective mirror 8, laser semi-reflective mirror 9 forms V-type resonant cavity, is controlled the mould field of Output of laser and beam quality by the position controlling 8 and 9.
Embodiment 1 utilizes corner cube mirror and conjugation Double parabolic curvature reflecting mirror to realize the many journey reflections of pump light, also improves the utilance of parabolic reflector while reaching the high-selenium corn to pump light, high usage.
Embodiment 2
Pump light many journeys transmission system, as shown in Figure 5.Its first parabolic reflector 1 and the second parabolic reflector 2 one-tenth conjugation are placed, and namely the focus of the first parabolic reflector 1 is in the center of the second parabolic reflector 2, and the focus of the second parabolic reflector 2 is in the center of the first parabolic reflector 1.First parabolic reflector is provided with pump light entrance aperture 10.The height of the first parabolic reflector 1 is lower than the second parabolic reflector 2, and difference in height is for placing two right-angle reflecting prism 6.Two corner cube mirrors 6 are positioned over the both sides, top of the first parabolic reflector 1, and the right-angle surface of corner cube mirror, towards the second parabolic reflector, is used for realizing 180 degree of reflections after the lateral shift of incident light.The center of the first and second parabolic reflectors all needs to carry out hollow out, the center of the first parabolic reflector 1 is for placing video disc laser crystal 4, when video disc laser crystal 4 is installed there is certain angle β (0≤β < π/4) in its normal and z-axis, correction mirror 5 is placed in the center of the second parabolic reflector 2, when correction mirror 5 is installed there is certain angle α (0≤α < π/4, and α ≠ β) in its normal and z-axis.Wherein, α and β angle is all defined in yz plane, shows in figure 6.
Pump light 3 after collimation to enter into from pump light entrance aperture 10 in the pump cavity that is made up of parabolic reflector 1 and 2.First pump light horizontal transport is to the second parabolic reflector 2 surface, focus place is focused on after being reflected, because parabolic reflector 1 and 2 is that conjugation is placed, so the focus of the second parabolic reflector 2 is the center of the first parabolic reflector 1, be place, video disc laser crystal 4 position, realize the first time pumping to video disc laser crystal 4, the front and back of video disc laser crystal 4 is coated with thoroughly high to pump light and that height is anti-film respectively, so pump light through after video disc laser crystal 4 reflect by rear surface, the second parabolic reflector 2 surface is got back to after unabsorbed pump light reflection.As shown in Figure 6, due to the existence of video disc laser crystal 4 angle of inclination beta, flare has upwards moved the distance of Δ Y1 when reflexing to the second parabolic reflector 2, the size of side-play amount is controlled by angle β, this light by the second parabolic mirror surface 2 reflect rear parallel incide first parabolic mirror surface 1 surface, and focus on the focus place of the first parabolic reflector 1, it is just in time the central hole of the second parabolic reflector 2, i.e. correction mirror 5, correction mirror 5 surface is coated with the film be all-trans to pump light, then, pump light is reflexed to the first parabolic reflector 1 surface by correction mirror 5, because correction mirror 5 also has the existence of inclination alpha, the pump light reflected is made to move Δ Y2, side-play amount is by | alpha-beta | and angle controls, complete the circulation of first time in two parabolic reflectors of pump light.Then start to circulate next time.As shown in Figure 6, when pump light second time reflexes on the first parabolic reflector 1, pump light reflection height upwards shifted by delta Y1 again, but now ray height has exceeded the height of the first parabolic reflector 1, pump light incides corner cube mirror 6, as shown in Figure 7, after incident pump light realizes the skew of horizontal Δ X size after corner cube mirror 6 reflects, reflected in parallel is gone back on the second parabolic reflector 2, through the second parabolic reflector 2 reflect focalization to video disc laser crystal 4 place, start the circulation of a new pump light.The distribution situation of pump spot on parabolic reflector 1 and 2 surface as shown in Figure 8.Can flare all be offset corner cube mirror 6 to the periphery as seen from Figure 8, offset Δ X is by corner cube mirror 6 state modulator, after the pump light of translation carries out repeatedly pumping, on the parallel corner cube mirror 6 inciding the other side of the first parabolic reflector 1, after pump light is carried out lateral shift, 180 degree reflect back on the second parabolic reflector 2, and refocusing is to video disc laser crystal 4 place.Pump light continues in many journeys transmission system, to carry out pumping, until all absorbed by video disc laser crystal.
In order to more clear description hot spot is in the transmission characteristic of this transmission system, the pump spot on parabolic reflector 1 and 2 surface is numbered the direction and order that describe light transmission by Fig. 8, specifically describe as follows: e → q → 4 → t → h → 5 → f → r → 4 → s → g → i → u → 4 → p → d → 5 → j → v → 4 → o → c → 5 → k → w → 4 → n → b → 5 → v → l → x → 4 → m → a → A → E → 4 → H → D → 5 → B → F → 4 → G → C → 5 → e, can find out, under the prerequisite that conjugation Double parabolic curvature reflecting mirror size does not change, by the translation control technology to pump light of corner cube mirror, because pump light is reflected by the film that is all-trans that rear surface is plated when video disc laser crystal is inner, pump light has getted over 2 times at crystals, pumping number of times is brought up to 8*2=16 time, can find out that the utilance of parabolic reflector is higher, pump light is almost absorbed completely by video disc laser crystal, pump light distributes more even thereon, reduce the thermal distoftion of parabolic reflector.
Apply the disc piece solid laser of described many journeys transmission system, as shown in Figure 5.Placement two laser mirrors and video disc laser crystal 4 is also needed to form V-type resonant cavity in the second parabolic reflector periphery of many journeys transmission system, wherein 8 is laser total reflective mirror, and plated surface laser is all-trans film, and 9 is laser semi-reflective mirror, the semi-transparent semi-reflecting film of plated surface laser, for the output of laser.The center hollow part of the second parabolic reflector 2 will do slightly larger, as laser emitting hole, can cross arrive laser total reflective mirror 8 and laser semi-reflective mirror 9 by hollow part to make laser.
Because video disc laser crystal 4 is by pump light repeatedly pumping, just superlaser can be produced, wherein video disc laser crystal 4 and laser total reflective mirror 8, laser semi-reflective mirror 9 forms V-type resonant cavity, is controlled the mould field of Output of laser and beam quality by the position controlling 8 and 9.
Embodiment 2 utilizes multiple corner cube mirror and conjugation Double parabolic curvature reflecting mirror to realize pump light multiple reflections, further increase the uniformity of hot spot, thus better avoid thermal distoftion and thermal lensing effect, also improve the utilance of parabolic reflector while reaching the high-selenium corn to pump light, high usage.
Embodiment 3
Pump light many journeys transmission system, as shown in Figure 9.Its first parabolic reflector 1 and the second parabolic reflector 2 one-tenth conjugation are placed, and namely the focus of the first parabolic reflector 1 is in the center of the second parabolic reflector 2, and the focus of the second parabolic reflector 2 is in the center of the first parabolic reflector 1.On first parabolic reflector, both sides are respectively equipped with pump light entrance aperture 10.The height of the first parabolic reflector 1 is lower than the second parabolic reflector 2, and difference in height is for placing two corner cube mirrors 6.Two right-angle reflecting prism 6 are positioned over the both sides, top of the first parabolic reflector 1, and the right-angle surface of corner cube mirror, towards the second parabolic reflector, is used for realizing 180 degree of reflections after the lateral shift of incident light.The center of the first and second parabolic reflectors all needs to carry out hollow out, the center of the first parabolic reflector 1 is for placing video disc laser crystal 4, when video disc laser crystal 4 is installed there is certain angle β (0≤β < π/4) in its normal and z-axis, correction mirror 5 is placed in the center of the second parabolic reflector 2, when correction mirror 5 is installed there is certain angle α (0≤α < π/4, and α ≠ β) in its normal and z-axis.Wherein, α and β angle is all defined in yz plane, shows in Fig. 10.
Two-way pump light 3 after collimation enters into from the both sides pump light entrance aperture 10 of the first parabolic reflector 1 in the pump cavity that is made up of parabolic reflector 1 and 2 respectively.For a wherein road pump light 3, analytic explanation situation.First pump light 3 horizontal transport is to the second parabolic reflector 2 surface, focus place is focused on after being reflected, because parabolic reflector 1 and 2 is that conjugation is placed, so the focus of the second parabolic reflector 2 is the center of the first parabolic reflector 1, be place, video disc laser crystal 4 position, realize the first time pumping to video disc laser crystal 4, the front and back of video disc laser crystal 4 is coated with thoroughly high to pump light and that height is anti-film respectively, so pump light through after video disc laser crystal reflect by rear surface, the second parabolic reflector 2 surface is got back to after unabsorbed pump light reflection.As shown in Figure 10, due to the existence of video disc laser crystal 4 angle of inclination beta, flare has upwards moved the distance of Δ Y1 when reflexing to the second parabolic reflector 2, the size of side-play amount is controlled by angle β, this light by the second parabolic mirror surface 2 reflect rear parallel incide first parabolic mirror surface 1 surface, and focus on the focus place of the first parabolic reflector 1, it is just in time the central hole of the second parabolic reflector 2, i.e. correction mirror 5, correction mirror 5 surface is coated with the film be all-trans to pump light, then, pump light is reflexed to the first parabolic reflector 1 surface by correction mirror 5, because correction mirror also has the existence of inclination alpha, the pump light reflected is made to move Δ Y2, side-play amount is by | alpha-beta | and angle controls, complete the circulation of first time in two parabolic reflectors of pump light.Thus start to circulate next time.As shown in Figure 10, when pump light second time reflexes on the first parabolic reflector 1, pump light reflection height upwards shifted by delta Y1 again, but now ray height the first height exceeding parabolic reflector 1, pump light incides corner cube mirror 6, as shown in figure 11, after incident pump light realizes the skew of horizontal Δ X size after corner cube mirror 6 reflects, reflected in parallel is gone back on the second parabolic reflector 2, through the second parabolic reflector 2 reflect focalization to video disc laser crystal 4 place, start the circulation of a new pump light.The distribution of pump spot on parabolic reflector 1 and 2 surface as shown in figure 12.Can flare all be offset corner cube mirror to the periphery as seen from Figure 12, offset Δ X is by corner cube mirror 6 state modulator, after the pump light of translation carries out repeatedly pumping, parallelly incide on the corner cube mirror 6 of other side, after pump light is carried out lateral shift, 180 degree reflect back on parabolic reflector 2, and refocusing is to video disc laser crystal 4 place.
In order to more clear description hot spot is in the transmission characteristic of this transmission system, the pump spot on parabolic reflector 1 and 2 surface is numbered the direction and order that describe light transmission by Figure 12, and the concrete route of a road pump light is as follows: e → q → 4 → t → h → 5 → f → r → 4 → s → g → i → u → 4 → p → d → 5 → j → v → 4 → o → c → 5 → k → w → 4 → n → b → 5 → v → l → x → 4 → m → a → A → E → 4 → H → D → 5 → B → F → 4 → G → C.The concrete route of another road pump light is as follows: C → G → 4 → F → B → 5 → D → H → 4 → E → A → a → m → 4 → x → l → v → 5 → b → n → 4 → w → k → 5 → c → o → 4 → v → j → 5 → d → p → 4 → u → i → g → s → 4 → r → f → 5 → h → t → 4 → q → e.Draw as calculated, because pump light is reflected by the film that is all-trans that rear surface is plated when video disc laser crystal is inner, pump light has getted over 2 times at crystals, double light path pumping system to the pumping number of times of video disc laser crystal up to 8*2*2=32 time, thus pumping number of times can be doubled again, laser output power is able to double, realizes high power laser and export.
Apply the disc piece solid laser of described many journeys transmission system, as shown in Figure 9.Placement two laser mirrors and video disc laser crystal 4 is also needed to form V-type resonant cavity in the second parabolic reflector periphery of many journeys transmission system, wherein 8 is laser total reflective mirror, and plated surface laser is all-trans film, and 9 is laser semi-reflective mirror, the semi-transparent semi-reflecting film of plated surface laser, for the output of laser.The center hollow part of the second parabolic reflector 2 will do slightly larger, as laser emitting hole, can cross arrive laser total reflective mirror 8 and laser semi-reflective mirror 9 by hollow part to make laser.
Because video disc laser crystal 4 is by pump light repeatedly pumping, just superlaser can be produced, wherein video disc laser crystal 4 and laser total reflective mirror 8, laser semi-reflective mirror 9 forms V-type resonant cavity, is controlled the mould field of Output of laser and beam quality by the position controlling 8 and 9.
The feature that embodiment 3 utilizes described many journeys transmission system hot spot to have good uniformity, loads twice pump light, makes pumping light power double, thus improves the energy of Output of laser, produces high power laser and exports.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. pump light many journeys transmission system, it is characterized in that, comprise: first, second parabolic reflector, corner cube mirror, video disc laser crystal and correction mirror, described first parabolic reflector and the second parabolic reflector conjugation are arranged, the height of described first parabolic reflector is lower than the second parabolic reflector, its surface is provided with pump light entrance aperture, its center hollow out is also provided with the video disc laser crystal of adjustable angle, corner cube mirror is provided with above it, the described video disc laser crystal back side is coated with the film that is all-trans, front is coated with high transmittance film, described corner cube mirror right-angle surface is towards the second parabolic reflector, the center hollow out of described second parabolic reflector is also provided with the correction mirror of adjustable angle, its surface is provided with laser emitting hole,
Pump light is incident from the pump light entrance aperture being positioned at the first parabolic reflector, enter the pump cavity be made up of first, second parabolic reflector and corner cube mirror, pump spot is made to drop on corner cube mirror through video disc laser crystal and correction mirror adjustment, produce spot displacement, pump light repeatedly forms repeatedly pumping through video disc laser crystal, and the laser that video disc laser crystal sends is from the laser emitting hole outgoing being positioned at the second parabolic reflector.
2. pump light many journeys transmission system as claimed in claim 1, it is characterized in that, also comprise pump light completely reflecting mirror, described pump light completely reflecting mirror is arranged on described first parabolic reflector, utilizes reversibility of optical path, again forms the many journey transmission of pump light.
3. pump light many journeys transmission system as claimed in claim 1 or 2, it is characterized in that, described corner cube mirror has one or more.
4. pump light many journeys transmission system as claimed in claim 3, it is characterized in that, described corner cube mirror is the eyeglass that is all-trans of right-angle reflecting prism or two form right angles.
5. pump light many journeys transmission system as claimed in claim 1 or 2, it is characterized in that, described pump light entrance aperture has one or more.
6. a disc piece solid laser, it is characterized in that, comprise the pumping many journeys optical transmission system as described in claim 1 to 5 Arbitrary Term and V-type laserresonator, pump light through collimation enters pump light many journeys transmission system through pump light entrance aperture, video disc laser crystal in described many journeys transmission system is through repeatedly pumping, the laser produced is undertaken vibrating, amplifying by V-type laserresonator, realizes stable superlaser and exports.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106684687A (en) * | 2016-12-26 | 2017-05-17 | 华中科技大学 | Disc solid laser amplifier |
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| CN104269725B (en) * | 2014-09-12 | 2017-03-08 | 华中科技大学 | Pump light many journeys Transmission system of a kind of pair of video disc concatenation and disc piece solid laser |
| CN107516813B (en) * | 2016-06-17 | 2024-03-29 | 中国科学院大连化学物理研究所 | Pyramid type multi-stroke pumping disc laser |
| CN109494551B (en) * | 2017-09-13 | 2024-03-01 | 中国科学院大连化学物理研究所 | Disc laser |
| CN109962400A (en) * | 2017-12-14 | 2019-07-02 | 中国科学院大连化学物理研究所 | A kind of beam quality reforming unit |
| CN109286123B (en) * | 2018-08-30 | 2019-08-13 | 华中科技大学 | One kind being based on three paraboloidal disc lasers |
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| CN114583531B (en) * | 2022-04-26 | 2022-08-09 | 苏州中辉激光科技有限公司 | Integrated pumping device, disc laser and mounting method thereof |
| CN117477333B (en) * | 2023-12-27 | 2024-05-14 | 武汉光谷航天三江激光产业技术研究院有限公司 | Multi-pass amplifying device and method for laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10005195A1 (en) * | 2000-02-05 | 2001-08-16 | Univ Stuttgart Strahlwerkzeuge | Laser amplifier system |
| DE10054289A1 (en) * | 2000-11-02 | 2002-02-28 | Rofin Sinar Laser Gmbh | Solid body laser with laser intensifier for intensifying oscillator beams produced from resonator uses sheet of crystal as intensifier medium for intensifying oscillator beam emerging from resonator |
| RU2517963C1 (en) * | 2010-04-19 | 2014-06-10 | Хуачжун Юниверсити Оф Сайенс Энд Текнолоджи | Disc-shaped solid laser |
| WO2013013382A1 (en) * | 2011-07-25 | 2013-01-31 | 华中科技大学 | Homogenized rod based multi-pump disc solid-state laser |
| CN103050877B (en) * | 2012-12-20 | 2014-10-29 | 华中科技大学 | Splicing technology-based compact type multi-disc tandem-connection solid laser |
| CN203503967U (en) * | 2013-10-22 | 2014-03-26 | 华中科技大学 | Pump light multi-stroke transmission system and disc solid laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106684687A (en) * | 2016-12-26 | 2017-05-17 | 华中科技大学 | Disc solid laser amplifier |
| CN106684687B (en) * | 2016-12-26 | 2019-03-05 | 华中科技大学 | A kind of disc solid laser amplifier |
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