CN1917305A - Mixing method for high-powered dual resonant cavity coupled through dispersion - Google Patents
Mixing method for high-powered dual resonant cavity coupled through dispersion Download PDFInfo
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- CN1917305A CN1917305A CN 200510090382 CN200510090382A CN1917305A CN 1917305 A CN1917305 A CN 1917305A CN 200510090382 CN200510090382 CN 200510090382 CN 200510090382 A CN200510090382 A CN 200510090382A CN 1917305 A CN1917305 A CN 1917305A
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Abstract
According to Brewster's angel, at least one piece of dispersion coupling prism or grating is setup on optical path inside laser double resonance to carry out dispersion spectrum for laser in multiple spectral lines. Then, outputting mixing laser in larger power is realized directly. Or, optical feedback is carried out for spectral lines after spectrum is obtained, and then, outputting mixing laser in larger power is realized. Frequency doubling optical path in single channel or dual channel composed of prism and two cavity mirrors is adopted in the invention to overcome disadvantages difficult to coat film in previous technique. Being in simple structure, the invention realizes mixing laser output of dispersion coupling double resonance in large power of reaching to watts to scores of watts or higher in high efficiency.
Description
Technical field
The present invention relates to the high-power Tunable Laser Technology of a kind of generation, particularly relate to by the described mixing method for high-powered dual resonant cavity coupled through dispersion of claim 1.
Background technology
The high-power all-solid-state Laser Devices, particularly tunable mixing laser device is owing to have compact conformation, long, efficient advantages of higher of life-span, be widely used in fields such as industry, scientific research, medical treatment, military affairs, demonstration, measurement, become one of direction of the most active and tool prospect of laser field in recent years.
Common solid state laser is placed a laser crystal and 1-2 piece nonlinear optical crystal between resonator mirror, wherein said nonlinear optical crystal is as parameter medium and coupling paameter medium.Pump light is placed on the place ahead (end pumping) of a resonator mirror or side (profile pump) the exciting laser medium of laser crystal sends fluorescence, utilize the nonlinear effect of nonlinear optical material to obtain and frequency, difference frequency or parameter output again, in resonant cavity, produce different wavelength of laser.The conventional laser technology utilizes the plated film of chamber mirror and crystal to obtain the starting of oscillation of required spectral line usually, when many spectral lines vibrate simultaneously in needs obtain laser cavity, just need on resonator mirror and crystal, carry out plated film to many spectral lines simultaneously, and for different wavelength, the requirement of plated film is also inequality.In some cases, the multiline Wavelength of Laser is very approaching, is difficult to it is separated on plated film, and the coating technique of chamber mirror and crystal has been proposed very high requirement, in some cases or even coating technique insurmountable.The more important thing is that the thicknesses of layers of multiline plated film is thicker generally speaking, film quality and anti-damage threshold are lower, even the technical multiline blooming of having realized is coated with, but can't satisfy the high-power laser device requirement on reality is used.
Summary of the invention
The objective of the invention is to overcome the shortcoming of existing laser, adopt the prism chromatic dispersion to be coupled and change the purpose of controlling the spectral line starting of oscillation in the conventional apparatus light path by the cavity mirror plating film, overcome the shortcoming of original technology plated film difficulty, can be applicable to all solid state laser, optical parametric oscillator and tunable titanium-doped sapphire laser, obtain the tunable laser output of 355nm, 894nm and 3-5 μ m, thereby a kind of high-powered dual resonant cavity coupled through dispersion mixing laser device that is widely used in fields such as industry, military affairs, scientific research, amusement, medical treatment is provided.
For achieving the above object, technical solution of the present invention provides a kind of mixing method for high-powered dual resonant cavity coupled through dispersion, be used to produce high-power mixing laser, it is on the light path in the laser double resonator, by Brewster angle at least one chromatic dispersion coupling prism or grating are set, multiline laser is carried out the chromatic dispersion beam split, directly realize high-power mixing laser output then, or carry out light respectively at the spectral line after the beam split and feed back, realize high-power mixing laser output again.
Described mixing method for high-powered dual resonant cavity coupled through dispersion, its equipment therefor, form by light source, Q switching, resonator mirror, laser crystal and nonlinear optical crystal, wherein, be sequentially set with on the light path of plane resonantor mirror the right: Q switching, laser crystal, nonlinear optical crystal and left side are the first plano-concave resonator mirror of concave surface; Light source is placed in the side of laser crystal, is just injecting laser crystal; Above-mentioned each optical element is installed on the optical table of tunable angle; Its described chromatic dispersion coupling prism or grating on the light path between laser crystal and the nonlinear optical crystal, are fixed on the horizontal revolving stage of tunable angle; Nonlinear optical crystal is at least one.
Described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefor, its described Q switching is arranged between laser crystal and the chromatic dispersion coupling prism, is electro-optical Q-switch or acoustooptic Q-switching or acousto-optic mode-locking device.
Described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefor, its described nonlinear optical crystal is in three lithium borates, barium metaborate, potassium niobate, titanyl potassium phosphate, periodic polarized titanyl potassium phosphate, phosphorus germanium zinc, periodic polarized lithium tantalate, periodic polarized lithium niobate, periodic polarized lithium niobate or other nonlinear optical crystal any.
Described mixing method for high-powered dual resonant cavity coupled through dispersion, its equipment therefor, form by light source, resonator mirror, laser crystal, birefringent filter and Cs atomic vapour chamber, wherein, be sequentially set with on the light path of plane resonantor mirror the right: birefringent filter, laser crystal, Cs atomic vapour chamber and left side are the first plano-concave resonator mirror of concave surface; Light source is placed in the left side of plane resonantor mirror, is just injecting the plane resonantor mirror, injects laser crystal through birefringent filter again; Above-mentioned each optical element is installed on the optical table of tunable angle; Its described chromatic dispersion coupling prism or grating between laser crystal and Cs atomic vapour chamber, are fixed on the horizontal revolving stage of tunable angle.
Described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefor, it comprises that also the right side is the second plano-concave resonator mirror of concave surface, be placed on the output light path of the arbitrary Shu Guang in the light beam after chromatic dispersion coupling prism or the beam split of the grating left side, the concrete placement location of the second plano-concave resonator mirror is decided by the chromatic dispersion angle of chromatic dispersion coupling prism material.
Described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefor, its described light source is semiconductor laser, photoflash lamp or solid state laser.
Described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefor, its described laser crystal is neodymium-doped yttrium-aluminum garnet (Nd:YAG), Nd-doped yttrium vanadate (Nd:YVO
4), mix thulium and yttrium aluminum garnet (Tm:YAG), neodymium-doped yttrium-fluoride lithium (Nd:YLF) or titanium-doped sapphire (Ti:S).
Described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefor, its described chromatic dispersion coupling prism, when being two, two chromatic dispersion coupling prisms closely are positioned on the light path by Brewster angle.
Described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefor, its described resonator mirror is flat mirror, plano-concave mirror, planoconvex lens, grating, Fabry-Perot etalon.
Superiority of the present invention: high-powered dual resonant cavity coupled through dispersion mixing laser method of the present invention, its equipment therefor, by one or a few prism, one or an above nonlinear optical crystal, a laser crystal, resonator mirror, pump light is formed, wherein nonlinear optical crystal places on the output light path of prism, laser crystal is placed between the prism resonant cavity mirror, pump light is by side or end pumped laser crystal, the light of several different wave lengths that produce is separated when passing through prism, overcome the shortcoming that original technology is difficult to plated film, and it is simple in structure, its power can reach several watts to tens watts, realized efficient, powerful laser output, be widely used in quasi c. w., optical parametric oscillator and tunable laser, open up wide prospect for high power laser light output, can be widely used in military affairs, scientific research, amusement, fields such as medical treatment.
The present invention utilizes chromatic dispersion principle, and multiline laser is carried out the chromatic dispersion beam split, carries out the light feedback respectively at the spectral line after the beam split then, realizes high-power mixing laser output, overcomes the technical difficulty that utilizes coating technique to be difficult to realize under the conventional method.
Description of drawings:
Fig. 1 is the index path (quasi c. w.) of high-power all-solid-state ultraviolet laser apparatus;
Fig. 2 is the index path (quasi c. w.) of high-power OPO laser aid;
Fig. 3 is the index path (continuous wave) of high-power 894nm infrared laser device.
Embodiment
See Fig. 2, a kind of high-powered dual resonant cavity coupled through dispersion mixing laser device, form by light source 10, Q switching 2, resonator mirror, laser crystal 3, chromatic dispersion coupling prism 4 and nonlinear optical crystal, wherein, be sequentially set with on plane resonantor mirror 1 the right light path: Q switching 2, laser crystal 3, chromatic dispersion coupling prism 4, nonlinear optical crystal 5 and left side are the plano-concave resonator mirror 7 of concave surface.Light source 10 is placed in the side of laser crystal 3, is just injecting laser crystal 3.Light source 10 is semiconductor laser, photoflash lamp or solid state laser.Chromatic dispersion coupling prism 4 is Brewster angle prism (Brewster angle prisms), be fixed on the horizontal revolving stage of tunable angle, be positioned on the light path in the high-power double resonator by Brewster angle, other optical elements are installed on the optical table of tunable angle (not illustrating among the figure).Chromatic dispersion coupling prism 4 is also replaceable to be grating.
The plano-concave resonator mirror 8 that the right side is a concave surface is placed on the output light path of the arbitrary Shu Guang in the light beam after 4 left side beam split of chromatic dispersion coupling prism, and the concrete placement location of resonator mirror 8 is decided by the chromatic dispersion angle of chromatic dispersion coupling prism 4 materials.
Nonlinear optical crystal also can be two or more than two, and sequence arrangement on light path is between chromatic dispersion coupling prism 4 and plano-concave resonator mirror 7, as the nonlinear optical crystal among Fig. 15,6.
In concrete enforcement, also can directly export (not illustrating among the figure) and allow through the light beam after 4 beam split of chromatic dispersion coupling prism without plano-concave resonator mirror 8.
Chromatic dispersion coupling prism 4 also can be two, and two chromatic dispersion coupling prisms 4 closely are positioned on the light path by Brewster angle and (do not illustrate among the figure).Chromatic dispersion coupling prism 4 is pressed Brewster angle and is placed, and carries out the low-loss chromatic dispersion in order to the different wave length laser that mixing is produced.
See Fig. 3, a kind of high-powered dual resonant cavity coupled through dispersion mixing laser device, form by light source 10, resonator mirror, laser crystal 3, chromatic dispersion coupling prism 4, birefringent filter 9 and Cs atomic vapour chamber 11, wherein, be sequentially set with on plane resonantor mirror 1 the right light path: birefringent filter 9, laser crystal 3, chromatic dispersion coupling prism 4, Cs atomic vapour chamber 11 and left side are the plano-concave resonator mirror 7 of concave surface.Light source 10 is placed in the left side of plane resonantor mirror 1, is just injecting plane resonantor mirror 1, injects laser crystal 3 through birefringent filter 9 again.Here plane resonantor mirror 1 is the incident mirror of resonant cavity.Light source 10 is semiconductor laser, photoflash lamp or solid state laser.Chromatic dispersion coupling prism 4 is Brewster angle prism (Brewster angle prisms), be fixed on the horizontal revolving stage of tunable angle, be positioned on the light path in the high-power double resonator by Brewster angle, other optical elements are installed on the optical table of tunable angle (not illustrating among the figure).Chromatic dispersion coupling prism 4 is also replaceable to be grating.
The plano-concave resonator mirror 8 that the right side is a concave surface is placed on the output light path of the arbitrary Shu Guang in the light beam after 4 left side beam split of chromatic dispersion coupling prism, and the concrete placement location of resonator mirror 8 is decided by the chromatic dispersion angle of chromatic dispersion coupling prism 4 materials.
In concrete enforcement, also can directly export (not illustrating among the figure) and allow through the light beam after 4 beam split of chromatic dispersion coupling prism without plano-concave resonator mirror 8.
Chromatic dispersion coupling prism 4 also can be two, and two chromatic dispersion coupling prisms 4 closely are positioned on the light path by Brewster angle and (do not illustrate among the figure).Chromatic dispersion coupling prism 4 is pressed Brewster angle and is placed, and carries out the low-loss chromatic dispersion in order to the different wave length laser that mixing is produced.
In the accompanying drawings:
Nonlinear optical crystal 5,6 comprises: three lithium borates (LBO), barium metaborate (BBO), potassium niobate (KNbO3), titanyl potassium phosphate (KTP), periodic polarized titanyl potassium phosphate (PPKTP), phosphorus germanium zinc (ZnGeP), periodic polarized lithium tantalate (PPLT), periodic polarized lithium niobate (PPLN) or other nonlinear optical crystal and optical superlattice crystal.
Pump light pumping laser crystal sends fluorescence, by starting of oscillation to resonator mirror plated film and the required wavelength spectral line of adjustment acquisition, utilize the nonlinear effect of nonlinear optical material to obtain and frequency, difference frequency or parameter output again, in resonant cavity, produce different wavelength of laser, these light are through behind one or the two Brewster angle prisms, by beam split, on the output light path of the light beam after the prismatic decomposition, place resonator mirror or directly output because its exit direction is different, can obtain the laser of required wavelength.Resonator mirror and crystal only need to carry out plated film at one or two spectral lines in the described dual resonant cavity coupled through dispersion mixing laser device, avoided on resonator mirror and crystal, to carry out plated film to many spectral lines simultaneously in the common laser, improve its accuracy when having reduced the difficulty of plated film, guaranteed the efficient stable of output laser.
Make a high-powered dual resonant cavity coupled through dispersion mixing laser device according to the light path of Fig. 1 and export quasi-continuous ultraviolet light, resonator mirror 1 is selected flat mirror for use, one side is plated the 1064nm high-reflecting film, resonator mirror 7 is selected the plano-concave mirror for use, one side is plated 1064nm, 532nm high-reflecting film, resonator mirror 8 and is selected the plano-concave mirror for use, and one side is plated the 532nm film that is all-trans; It is θ=0 ° that nonlinear optical crystal 5 is selected cutting angle for use, the lbo crystal of φ=46.9 °; It is θ=90 ° that nonlinear optical crystal 6 is selected cutting angle for use, and the ktp crystal of φ=23.5 ° or cutting angle are θ=90 °, the lbo crystal of φ=0 °; It is that 69 ° prism is placed between laser crystal 3 and the nonlinear optical crystal 5 by the Brewster angle of 1064nm light that chromatic dispersion coupling prism 4 is selected drift angle for use, and laser crystal is selected neodymium-doped yttrium-aluminum garnet (Nd:YAG) for use; Q switching 2 selects for use acoustooptic Q-switching to be placed between resonator mirror 1 and the laser crystal 3, is used to produce quasi-continuous lasing; Put resonator mirror 8 before a branch of light in the two-beam after 4 beam split of chromatic dispersion coupling prism, the concrete placement location of resonator mirror 8 is decided by the chromatic dispersion angle of chromatic dispersion coupling prism 4 materials.Centre wavelength is the semiconductor laser array of 808nm is placed in laser crystal 3 as light source 10 side.
Regulate the fluorescence starting of oscillation that resonator mirror 1 and 7 makes Nd:YAG 1064nm, regulating nonlinear optical crystal 6 resonant cavity mirrors 8 makes 1064nm laser produce the 532nm frequency doubled light, and make frequency doubled light produce vibration, regulate nonlinear optical crystal 5 1064nm and 532nm laser are produced and frequency, then export the quasi-continuous ultraviolet light of 355nm at Brewster angle chromatic dispersion coupling prism 4 places.
Embodiment 2:
Light path according to Fig. 2 is made a high-powered dual resonant cavity coupled through dispersion OPO laser aid, resonator mirror 1 is selected flat mirror for use, one side is plated the 785nm high-reflecting film, resonator mirror 7 is selected the plano-concave mirror for use, and one side is plated 3-6 μ m broadband film, resonator mirror 8 is selected the plano-concave mirror for use, and one side is plated 3-5 μ m broadband film; It is that 69 ° prism is placed between laser crystal 3 and the nonlinear optical crystal 5 by the Brewster angle of 1064nm light that chromatic dispersion coupling prism 4 is selected drift angle for use, and laser crystal 3 is selected for use and mixed thulium and yttrium aluminum garnet (Tm:YAG); Nonlinear optical crystal 5 is selected phosphorus germanium zinc crystal (ZnGeP) for use; Q switching 2 selects for use acoustooptic Q-switching to be placed between resonator mirror 1 and the laser crystal 3; Put resonator mirror 8 before a branch of light in the two-beam after 4 beam split of chromatic dispersion coupling prism, the concrete placement location of resonator mirror 8 is decided by the chromatic dispersion angle of chromatic dispersion coupling prism 4 materials.Wavelength is the semiconductor laser array of 785nm is placed in laser crystal 3 as light source 10 side.
Regulate the fluorescence starting of oscillation that resonator mirror 1 and 7 makes Tm:YAG2 μ m, regulate nonlinear optical crystal 6 resonant cavity mirrors 8 and can obtain the signal wave of 3.3-6 μ m at resonator mirror 8 places at the idler of Brewster angle chromatic dispersion coupling prism 4 places output 3-5 μ m.
Embodiment 3:
Make a high-powered dual resonant cavity coupled through dispersion mixing laser device output 894nm infrared laser according to the light path of Fig. 3, resonator mirror 1 is selected flat mirror for use, one side is plated the 532nm high-reflecting film, resonator mirror 7 is selected the plano-concave mirror for use, one side is plated the 894nm high-reflecting film, resonator mirror 8 is selected the plano-concave mirror for use, and one side is plated 894nm through the part transmission film that is 10%; Between resonator mirror 1 and laser crystal 3, establish a birefringent filter 9; Cs atomic vapour chamber 11 is positioned on resonator mirror 7 the right light paths; It is that 69 ° prism is placed between laser crystal 3 and the Cs atomic vapour chamber 11 by the Brewster angle of 1064nm light that chromatic dispersion coupling prism 4 is selected drift angle for use, and laser crystal 3 is selected ti sapphire crystal (Ti:S) for use; Put resonator mirror 8 on the output light path of light beam after 4 beam split of chromatic dispersion coupling prism, the concrete placement location of resonator mirror 8 is decided by the chromatic dispersion angle of chromatic dispersion coupling prism 4 materials.Wavelength is that the laser of 532nm is placed on the place ahead of a resonator mirror 1 from the end pumped laser crystal 3 as pump light 10.
Regulate resonator mirror 1 and 7 and birefringent filter 9 incide in the Cs atomic vapour chamber 11 after making the fluorescence starting of oscillation of ti sapphire crystal (Ti:S) 852nm, regulate resonator mirror 7 and 8, make the 894nm spectral line of Cs atomic vapour produce vibration, then export the infrared light of 894nm at resonator mirror 8 places.
Claims (10)
1. mixing method for high-powered dual resonant cavity coupled through dispersion, be used to produce high-power mixing laser, it is characterized in that: on the light path in the laser double resonator, by Brewster angle at least one chromatic dispersion coupling prism or grating are set, multiline laser is carried out the chromatic dispersion beam split, directly realize high-power mixing laser output then, or carry out the light feedback respectively, realize high-power mixing laser output again at the spectral line after the beam split.
2. by the described mixing method for high-powered dual resonant cavity coupled through dispersion of claim 1, its equipment therefor, form by light source, Q switching, resonator mirror, laser crystal and nonlinear optical crystal, wherein, be sequentially set with on the light path of plane resonantor mirror the right: Q switching, laser crystal, nonlinear optical crystal and left side are the first plano-concave resonator mirror of concave surface; Light source is placed in the side of laser crystal, is just injecting laser crystal; Above-mentioned each optical element is installed on the optical table of tunable angle; It is characterized in that: described chromatic dispersion coupling prism or grating on the light path between laser crystal and the nonlinear optical crystal, are fixed on the horizontal revolving stage of tunable angle; Nonlinear optical crystal is at least one.
3. by the described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefor of claim 2, it is characterized in that: described Q switching, be arranged between laser crystal and the chromatic dispersion coupling prism, be electro-optical Q-switch or acoustooptic Q-switching or acousto-optic mode-locking device.
4. by the described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefor of claim 2, it is characterized in that: described nonlinear optical crystal is in three lithium borates, barium metaborate, potassium niobate, titanyl potassium phosphate, periodic polarized titanyl potassium phosphate, phosphorus germanium zinc, periodic polarized lithium tantalate, periodic polarized lithium niobate, periodic polarized lithium niobate or other nonlinear optical crystal any.
5. by the described mixing method for high-powered dual resonant cavity coupled through dispersion of claim 1, its equipment therefor, form by light source, resonator mirror, laser crystal, birefringent filter and Cs atomic vapour chamber, wherein, be sequentially set with on the light path of plane resonantor mirror the right: birefringent filter, laser crystal, Cs atomic vapour chamber and left side are the first plano-concave resonator mirror of concave surface; Light source is placed in the left side of plane resonantor mirror, is just injecting the plane resonantor mirror, injects laser crystal through birefringent filter again; Above-mentioned each optical element is installed on the optical table of tunable angle; It is characterized in that: described chromatic dispersion coupling prism or grating between laser crystal and Cs atomic vapour chamber, are fixed on the horizontal revolving stage of tunable angle.
6. by claim 2 or 5 described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefors, it is characterized in that: comprise that also the right side is the second plano-concave resonator mirror of concave surface, be placed on the output light path of the arbitrary Shu Guang in the light beam after chromatic dispersion coupling prism or the beam split of the grating left side, the concrete placement location of the second plano-concave resonator mirror is decided by the chromatic dispersion angle of chromatic dispersion coupling prism material.
7. by claim 2 or 5 described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefors, it is characterized in that: described light source is semiconductor laser, photoflash lamp or solid state laser.
8. by claim 2 or 5 described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefors, it is characterized in that: described laser crystal, for neodymium-doped yttrium-aluminum garnet, Nd-doped yttrium vanadate, mix thulium and yttrium aluminum garnet, neodymium-doped yttrium-fluoride lithium or titanium-doped sapphire.
9. by claim 2 or 5 described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefors, it is characterized in that: described chromatic dispersion coupling prism, or be two, two chromatic dispersion coupling prisms closely are positioned on the light path by Brewster angle.
10. by claim 2 or 5 described mixing method for high-powered dual resonant cavity coupled through dispersion equipment therefors, it is characterized in that: described resonator mirror is flat mirror, plano-concave mirror, planoconvex lens, grating, Fabry-Perot etalon tool.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104348071A (en) * | 2013-08-05 | 2015-02-11 | 中国科学院物理研究所 | Kerr-lens mode-locked all-solid-state laser |
| CN105140760A (en) * | 2015-09-30 | 2015-12-09 | 中国科学院合肥物质科学研究院 | Medical 6-micrometer waveband optical parameter laser |
| CN107069409A (en) * | 2017-01-20 | 2017-08-18 | 西北核技术研究所 | A kind of double-wavelength pulse of exocoel actively Q-switched alternately exports laser aid and method |
-
2005
- 2005-08-16 CN CN 200510090382 patent/CN1917305A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104348071A (en) * | 2013-08-05 | 2015-02-11 | 中国科学院物理研究所 | Kerr-lens mode-locked all-solid-state laser |
| CN105140760A (en) * | 2015-09-30 | 2015-12-09 | 中国科学院合肥物质科学研究院 | Medical 6-micrometer waveband optical parameter laser |
| CN107069409A (en) * | 2017-01-20 | 2017-08-18 | 西北核技术研究所 | A kind of double-wavelength pulse of exocoel actively Q-switched alternately exports laser aid and method |
| CN107069409B (en) * | 2017-01-20 | 2020-05-05 | 西北核技术研究所 | Dual-wavelength pulse alternate output laser device and method with external cavity actively adjusting Q |
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