CN102244346A - End-pumped laser utilizing half-wave plates - Google Patents
End-pumped laser utilizing half-wave plates Download PDFInfo
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- CN102244346A CN102244346A CN2011101627810A CN201110162781A CN102244346A CN 102244346 A CN102244346 A CN 102244346A CN 2011101627810 A CN2011101627810 A CN 2011101627810A CN 201110162781 A CN201110162781 A CN 201110162781A CN 102244346 A CN102244346 A CN 102244346A
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Abstract
The invention relates to an end-pumped laser which comprises a pump laser, a coupling lens and a laser crystal, wherein the pump laser outputs linearly polarized light; and the coupling lens is used for coupling the pump light of the pump laser into the laser crystal. The laser is characterized by also comprising a plurality of reflectors and half-wave plates, wherein the residual pump lights which are emitted from the laser crystal are reflected by the plurality of reflectors and are emitted on a polarization beam splitter; and the residual pump lights need to pass the half-wave plates before being emitted from the laser crystal and then emitted on the polarization beam splitter again, and the residual pump lights which needs to be emitted in the polarization beam splitter are reflected into the laser crystal again.
Description
Technical field
The present invention relates to a kind of laser, relate generally to a kind of solid state laser, belong to the photoelectron technology field.
Background technology
Gas or solid state laser are lasers very commonly used at present, present employed solid state laser uses LD to carry out pumping mostly, pump light is entered in the resonant cavity that is provided with gain medium by end face or side, so that gain medium is carried out pumping, thereby generation laser, the laser that is produced may be fundamental frequency light, and this fundamental frequency light is not that we are needed, may also need increase a frequency-doubling crystal in intra resonant cavity or outside this moment, realize the frequency multiplication of fundamental frequency light, thereby obtain our needed laser.End pumping of the prior art as shown in Figure 1, it comprises pumping source 1.1, coupled lens 1.2 and laser crystal 1.3.Wherein pumping source 1.1 and coupled lens 1.2 all are positioned at the distolateral of laser crystal, this structure is an end pumping, generally speaking, the pump light input of laser crystal 1.3 is coated with the pump light anti-reflection film, fundamental frequency light high-reflecting film, and an other end of laser crystal 1.3 is coated with the pump light high-reflecting film in order to realize making full use of the purpose of pump light, so that the remaining pump light that is not fully utilized enters the pumping effect of laser crystal realization to laser crystal once more.At said structure, also may be not have above-mentioned film layer structure, and a mirror respectively is set that respectively as the chamber mirror, using plated film then is to have replaced the chamber mirror with rete in the both sides of laser crystal at the two ends of laser crystal.But no matter for which kind of situation, if being set at the exit end of laser crystal, the high-reflecting film of pump light all can bring a problem, that is exactly may all not absorbed by laser crystal after pump light is reflected back toward laser crystal, then cause a part of pump light to be reflected back toward pump laser source, this has just produced two problems, a problem is that pump light reflected back pumping source may destroy or influence pumping source, thereby being exactly pump light, the another one aspect leaked out laser crystal generation waste, if but the pump light high-reflecting film is not set at the laser crystal exit end, then can produce the heavy losses of pump light, this contradiction is a problem that needs solution at present.
To make full use of pump light and pump light reflected back pumping source can not designed a kind of profile pump technology in order to realize in the prior art, that is to say in the side pump light is tilted to inject in the pump light reflection cavity that leaves incidence window, though this pump technology has solved the problems referred to above to a certain extent, but this technical pattern complexity, and the profile pump technology of utilizing, and in actual conditions, because the restriction of conditioned disjunction assembling, we may can only adopt the end pumping technology.
The present invention proposes at above-mentioned problem, and a kind of end-pumped laser is provided, and it can be when making full use of pump light and can be with pump light reflected back pumping source.
Summary of the invention
According to one embodiment of the invention, a kind of laser of end pumping is provided, comprise: pump laser, coupled lens and laser crystal, described pump laser is output as linearly polarized light, described coupled lens is used for the pump light of pump laser is coupled into laser crystal, it is characterized in that: also comprise a plurality of speculums and half-wave plate, incided on the polarizing beam splitter mirror from the residual pump light of described laser crystal outgoing once more by described a plurality of mirror reflects, and described residual pump light needs before the polarizing beam splitter mirror through described half-wave plate to inciding once more from penetrating described laser crystal, and the described residual pump light that incides once more on the described polarizing beam splitter mirror is entered described laser crystal by reflection once more.
Preferably, the front/rear end of described laser crystal all is coated with the anti-reflection film of described pump light.
Preferably, on the laser emitting end face of laser crystal and, and be provided with the chamber mirror of described laser crystal on the optical axis direction of laser crystal than the farther position of described first speculum at the anti-reflection film that on the first nearest speculum of this outgoing end face, is coated with laser crystal laser on the light path.
Preferably, use coupled lens that the linear polarization pump light that pump laser sends is coupled into laser crystal, before entering laser crystal, described pump light passes polarizing beam splitter mirror, remaining pump light is reflexed on the polarizing beam splitter mirror by a plurality of speculums after penetrating laser crystal once more in laser crystal, penetrating laser crystal from described remaining pump light needed through half-wave plate before inciding described polarizing beam splitter mirror once more, and the described residual pump light that incides once more on the polarizing beam splitter mirror is entered described laser crystal once more by described polarization beam splitting mirroring.
Preferably, the front/rear end of described laser crystal all is coated with the anti-reflection film of described pump light.
Preferably, on the laser emitting end face of laser crystal and, and be provided with the chamber mirror of described laser crystal on the optical axis direction of laser crystal than the farther position of described first speculum at the anti-reflection film that on the first nearest speculum of this outgoing end face, is coated with laser crystal laser on the light path.
Description of drawings
Accompanying drawing 1 is the schematic diagram of end pumping in the prior art;
Accompanying drawing 2 is schematic diagrames of end-pumped laser of the present invention;
In two above-mentioned figure, 1.1 expression pump laser, 2.1 the pump laser that expression has polarization light output, 1.2 and 2.2 all represent coupled lens, 1.3 and 2.3 all represent laser crystal, 2.8 expression polarizing beam splitter mirrors, and 2.4-2.6 represents speculum, 2.7 the expression half-wave plate, 2.9 expression Effect of Back-Cavity Mirror.
Embodiment
To on basis in conjunction with the accompanying drawings, describe laser of the present invention in detail below, this laser comprises: the pump laser 2.1 of polarization light output, coupled lens 2.2 and laser crystal 2.3, wherein coupled lens is used for the pump light that pump laser sends is coupled into laser crystal 2.3, it is characterized in that: between pump laser 2.1 and laser crystal 2.3, also comprise polarizing beam splitter mirror 2.8, wherein half-wave plate is the half-wave plate of pump light wavelength, and comprise a plurality of speculum 2.4-2.6, the residual pump light that these a plurality of speculums are used for transmitting from laser crystal reflexes on the polarizing beam splitter mirror 2.8 and is reflected once more by described polarizing beam splitter mirror and enters in the laser crystal, and described residual pump light was needing to pass described half-wave plate before inciding polarizing beam splitter mirror after the laser crystal outgoing.
To introduce the operation principle of this laser below, the linearly polarized light of pump laser 2.1 output can transmission-polarizing beam-splitting mirror 2.8, this linear polarization pump light enters laser crystal laser crystal is carried out the pumping effect, the remaining pump light mirror 2.4-2.6 that successively is reflected after penetrating laser crystal reflects, and finally incide on the polarizing beam splitter mirror 2.8 once more, this remaining pump light has passed half-wave plate 2.7 before inciding polarizing beam splitter mirror 2.8 once more, because the effect of half-wave plate, the rotation of 90 degree can take place in the polarization direction of this linear polarization pump light, so will be polarized the beam splitter reflection once more on the incident polarization beam splitter, thereby enter laser crystal once more.Wherein, the process that is reflected of pump light is shown in the dotted line in the accompanying drawing 2.Like this, this part pump light just can the reflected back pump laser in, and because this part pump light has been reflected back toward in the laser crystal again, it can obtain utilizing once more.Though following situation may take place, the pump light that also promptly is polarized the beam splitter reflection is reflected and the transmission-polarizing beam-splitting mirror by the reflecting element of laser crystal exit end once more, but in fact laser crystal in passed through twice owing to this part pump light this moment, even residue is arranged this moment, surplus is also very little so, and the influence of its generation can be ignored.By above set-up mode, can realize that pump light multirow in laser crystal walks once, when avoiding superfluous pump light reflected back pump laser, also realized making full use of of pump light, well solved existing problem in the present end pumping.
For the position between coupled lens and polarizing beam splitter mirror relation, though in the accompanying drawing 2 among the given embodiment be coupled lens preceding, both positions relation can be arranged arbitrarily, also is that polarizing beam splitter mirror can be positioned at before the coupled lens.Wherein the position of half-wave plate can be provided with arbitrarily, is not limited to the position shown in the accompanying drawing 2, as long as can guarantee remaining pump light after penetrating laser crystal, incides once more and can pass this half-wave plate before the polarizing beam splitter mirror and get final product.
In order to reduce the loss of light reflection, preferably on the laser crystal front/rear end, all be coated with the pump light anti-reflection film.Laser generation for the ease of laser crystal, preferably on the laser emitting end face of laser crystal and, and be provided with the chamber mirror 2.9 of described laser crystal on the optical axis direction of laser crystal than speculum 2.4 farther positions at the anti-reflection film that on the nearest speculum 2.4 of this end face, is coated with laser crystal laser on the light path.
Use the method for pumping of said apparatus as follows: to use coupled lens that the linear polarization pump light that pump laser sends is coupled into laser crystal, before entering laser crystal, described pump light passes polarizing beam splitter mirror, remaining pump light is reflexed on the polarizing beam splitter mirror by a plurality of speculums after penetrating laser crystal once more in laser crystal, penetrating laser crystal from described remaining pump light needed through half-wave plate before inciding described polarizing beam splitter mirror once more, and the described residual pump light that incides once more on the polarizing beam splitter mirror is entered described laser crystal once more by described polarization beam splitting mirroring.
Claims (6)
1. the laser of an end pumping, comprise: pump laser, coupled lens and laser crystal, described pump laser is output as linearly polarized light, described coupled lens is used for the pump light of pump laser is coupled into laser crystal, it is characterized in that: also comprise a plurality of speculums and half-wave plate, incided on the polarizing beam splitter mirror from the residual pump light of described laser crystal outgoing once more by described a plurality of mirror reflects, and described residual pump light needs before the polarizing beam splitter mirror through described half-wave plate to inciding once more from penetrating described laser crystal, and the described residual pump light that incides once more on the described polarizing beam splitter mirror is entered described laser crystal by reflection once more.
2. laser according to claim 1 is characterized in that: the front/rear end of described laser crystal all is coated with the anti-reflection film of described pump light.
3. laser according to claim 1 and 2, it is characterized in that:, and be provided with the chamber mirror of described laser crystal on the optical axis direction of laser crystal than the farther position of described first speculum on the laser emitting end face of laser crystal and at the anti-reflection film that on the first nearest speculum of this outgoing end face, is coated with laser crystal laser on the light path.
4. the method for an end-pumped laser, comprise: use coupled lens that the linear polarization pump light that pump laser sends is coupled into laser crystal, before entering laser crystal, described pump light passes polarizing beam splitter mirror, remaining pump light is reflexed on the polarizing beam splitter mirror by a plurality of speculums after penetrating laser crystal once more in laser crystal, penetrating laser crystal from described remaining pump light needed through half-wave plate before inciding described polarizing beam splitter mirror once more, and the described residual pump light that incides once more on the polarizing beam splitter mirror is entered described laser crystal once more by described polarization beam splitting mirroring.
5. method according to claim 4 is characterized in that: the front/rear end of described laser crystal all is coated with the anti-reflection film of described pump light.
6. according to claim 4 or 5 described methods, it is characterized in that:, and be provided with the chamber mirror of described laser crystal on the optical axis direction of laser crystal than the farther position of described first speculum on the laser emitting end face of laser crystal and at the anti-reflection film that on the first nearest speculum of this outgoing end face, is coated with laser crystal laser on the light path.
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| CN2011101627810A CN102244346B (en) | 2011-06-14 | 2011-06-14 | End-pumped laser utilizing half-wave plates |
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| CN2011101627810A CN102244346B (en) | 2011-06-14 | 2011-06-14 | End-pumped laser utilizing half-wave plates |
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| CN102244346B CN102244346B (en) | 2013-03-13 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208730A (en) * | 2013-04-12 | 2013-07-17 | 中国科学院光电研究院 | Solid laser with annular pump structure |
| CN104659643A (en) * | 2015-02-12 | 2015-05-27 | 天津大学 | 0.9-mu m laser device for double-end polarization pump |
| CN105610039A (en) * | 2016-03-01 | 2016-05-25 | 华北电力大学（保定） | Device and method allowing high-efficiency utilization of pumping light of solid laser |
| CN108512027A (en) * | 2018-05-25 | 2018-09-07 | 深圳市海目星激光智能装备股份有限公司 | Annular chamber amplifying device for picosecond seed laser pulse |
| CN109768463A (en) * | 2017-11-08 | 2019-05-17 | 朗美通经营有限责任公司 | It is isolated by the pump of polarization splitting |
| WO2019100422A1 (en) * | 2017-11-24 | 2019-05-31 | 武汉华星光电半导体显示技术有限公司 | Excimer laser processing device and laser collection device thereof |
| CN113285338A (en) * | 2021-05-19 | 2021-08-20 | 张振国 | Method for improving pump light absorption efficiency of non-polarized absorption gain medium |
| CN113285339A (en) * | 2021-05-19 | 2021-08-20 | 张振国 | Polarization output ring resonator with tunable output rate and adjustable output mirror |
| CN115173205A (en) * | 2022-09-08 | 2022-10-11 | 度亘激光技术（苏州）有限公司 | Pumping system and pumping system adjusting method |
Citations (3)
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| CN101179176A (en) * | 2006-11-09 | 2008-05-14 | 深圳市大族激光科技股份有限公司 | Semiconductor dual-end pumped third harmonic ultraviolet laser |
| KR20100039842A (en) * | 2010-04-02 | 2010-04-16 | 단국대학교 산학협력단 | Optical parametric oscillator laser system pumped by another laser with two mutually orthogonal polarizations |
| CN101777724A (en) * | 2009-12-25 | 2010-07-14 | 武汉凌云光电科技有限责任公司 | End-pumped dual-wavelength coaxial switching output Q-switched base-frequency and double-frequency laser |
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2011
- 2011-06-14 CN CN2011101627810A patent/CN102244346B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179176A (en) * | 2006-11-09 | 2008-05-14 | 深圳市大族激光科技股份有限公司 | Semiconductor dual-end pumped third harmonic ultraviolet laser |
| CN101777724A (en) * | 2009-12-25 | 2010-07-14 | 武汉凌云光电科技有限责任公司 | End-pumped dual-wavelength coaxial switching output Q-switched base-frequency and double-frequency laser |
| KR20100039842A (en) * | 2010-04-02 | 2010-04-16 | 단국대학교 산학협력단 | Optical parametric oscillator laser system pumped by another laser with two mutually orthogonal polarizations |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208730A (en) * | 2013-04-12 | 2013-07-17 | 中国科学院光电研究院 | Solid laser with annular pump structure |
| CN103208730B (en) * | 2013-04-12 | 2015-08-19 | 中国科学院光电研究院 | There is the solid state laser of annular pump structure |
| CN104659643A (en) * | 2015-02-12 | 2015-05-27 | 天津大学 | 0.9-mu m laser device for double-end polarization pump |
| CN104659643B (en) * | 2015-02-12 | 2017-10-03 | 天津大学 | A kind of 0.9 μm of laser of both-end polarized pump |
| CN105610039A (en) * | 2016-03-01 | 2016-05-25 | 华北电力大学（保定） | Device and method allowing high-efficiency utilization of pumping light of solid laser |
| CN109768463A (en) * | 2017-11-08 | 2019-05-17 | 朗美通经营有限责任公司 | It is isolated by the pump of polarization splitting |
| CN109768463B (en) * | 2017-11-08 | 2023-11-28 | 朗美通经营有限责任公司 | Pump isolation by polarization splitting |
| WO2019100422A1 (en) * | 2017-11-24 | 2019-05-31 | 武汉华星光电半导体显示技术有限公司 | Excimer laser processing device and laser collection device thereof |
| CN108512027A (en) * | 2018-05-25 | 2018-09-07 | 深圳市海目星激光智能装备股份有限公司 | Annular chamber amplifying device for picosecond seed laser pulse |
| CN108512027B (en) * | 2018-05-25 | 2023-11-21 | 海目星激光科技集团股份有限公司 | Annular cavity amplifying device for picosecond seed laser pulse |
| CN113285338A (en) * | 2021-05-19 | 2021-08-20 | 张振国 | Method for improving pump light absorption efficiency of non-polarized absorption gain medium |
| CN113285339A (en) * | 2021-05-19 | 2021-08-20 | 张振国 | Polarization output ring resonator with tunable output rate and adjustable output mirror |
| CN115173205A (en) * | 2022-09-08 | 2022-10-11 | 度亘激光技术（苏州）有限公司 | Pumping system and pumping system adjusting method |
| CN115173205B (en) * | 2022-09-08 | 2023-01-31 | 度亘激光技术（苏州）有限公司 | Pumping system and pumping system adjusting method |
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| CN102244346B (en) | 2013-03-13 |
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