CN102244346B - End-pumped laser utilizing half-wave plates - Google Patents
End-pumped laser utilizing half-wave plates Download PDFInfo
- Publication number
- CN102244346B CN102244346B CN2011101627810A CN201110162781A CN102244346B CN 102244346 B CN102244346 B CN 102244346B CN 2011101627810 A CN2011101627810 A CN 2011101627810A CN 201110162781 A CN201110162781 A CN 201110162781A CN 102244346 B CN102244346 B CN 102244346B
- Authority
- CN
- China
- Prior art keywords
- laser
- laser crystal
- pump light
- beam splitter
- polarizing beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Lasers (AREA)
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 produces may be fundamental frequency light, and this fundamental frequency light is not that we are needed, may also need to 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 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 taking full advantage of the purpose of pump light, so that the remaining pump light that is not fully utilized enters the laser crystal realization again to the pumping effect of laser crystal.At said structure, also may be not have above-mentioned film layer structure at the two ends of laser crystal, and in the both sides of laser crystal a mirror is set respectively, respectively as the chamber mirror, then be to have replaced the chamber mirror with rete with plated film.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, problem is that pump light is reflected back pumping source and may destroys or affect pumping source, thereby being exactly pump light, the another one aspect leaked out laser crystal generation waste, if but at the laser crystal exit end pump light high-reflecting film is not set, then can produce the heavy losses of pump light, this contradiction is a problem that needs at present solution.
To take full advantage of pump light and pump light can be reflected back pumping source and design 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, although this pump technology has solved the problems referred to above to a certain extent, but this technical pattern is complicated, 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 for above-mentioned problem, and a kind of end-pumped laser is provided, and it can be when taking full advantage of pump light and pump light can be 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, again incided on the polarizing beam splitter mirror from the residual pump light of described laser crystal outgoing by described a plurality of mirror reflects, and described residual pump light needs through described half-wave plate before the polarizing beam splitter mirror to again inciding from penetrating described laser crystal, and the described residual pump light that again incides on the described polarizing beam splitter mirror is entered described laser crystal by reflection again.
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 on light path, be coated with the anti-reflection film of laser crystal laser from the first nearest speculum of this outgoing end face, and on the optical axis direction of laser crystal, be provided with the chamber mirror of described laser crystal than the farther position of described the first speculum.
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 again in laser crystal, penetrating laser crystal from described remaining pump light needed through half-wave plate before again inciding described polarizing beam splitter mirror, and the described residual pump light that again incides on the polarizing beam splitter mirror is entered described laser crystal again by described polarizing beam splitter mirror reflection.
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 on light path, be coated with the anti-reflection film of laser crystal laser from the first nearest speculum of this outgoing end face, and on the optical axis direction of laser crystal, be provided with the chamber mirror of described laser crystal than the farther position of described the first speculum.
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
The below will describe laser of the present invention in detail on basis by reference to the accompanying drawings, 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 coupled into laser crystal 2.3 for the pump light that pump laser is sent, 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, these a plurality of speculums are used for will reflexing to from the residual pump light that laser crystal transmits again to reflect on the polarizing beam splitter mirror 2.8 and by described polarizing beam splitter mirror entering 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.
The below will introduce the operation principle of this laser, 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, remaining pump light successively is reflected mirror 2.4-2.6 reflection after penetrating laser crystal, and finally again incide on the polarizing beam splitter mirror 2.8, this remaining pump light has passed half-wave plate 2.7 before again inciding polarizing beam splitter mirror 2.8, because the effect of half-wave plate, the rotation of 90 degree can occur in the polarization direction of this linear polarization pump light, so again will be polarized the beam splitter reflection on the incident polarization beam splitter, thereby again enter laser crystal.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 not be reflected back in the pump laser, and because this part pump light has been reflected back toward in the laser crystal again, it can obtain utilizing again.Although following situation may occur, the pump light that also namely is polarized the beam splitter reflection is reflected and the transmission-polarizing beam-splitting mirror by the reflecting element of laser crystal exit end again, 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 impact 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 to be reflected back pump laser, also realized taking full advantage of of pump light, well solved existing problem in the present end pumping.
For the position relationship between coupled lens and the polarizing beam splitter mirror, although in the accompanying drawing 2 among the given embodiment be coupled lens front, both position relationships can arbitrary arrangement, also is that polarizing beam splitter mirror can be positioned at before the coupled lens.Wherein the position of half-wave plate can arrange 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, again incides 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 on light path, be coated with the anti-reflection film of laser crystal laser from the nearest speculum 2.4 of this end face, and on the optical axis direction of laser crystal, be provided with the chamber mirror 2.9 of described laser crystal than speculum 2.4 farther positions.
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 again in laser crystal, penetrating laser crystal from described remaining pump light needed through half-wave plate before again inciding described polarizing beam splitter mirror, and the described residual pump light that again incides on the polarizing beam splitter mirror is entered described laser crystal again by described polarizing beam splitter mirror reflection.
Claims (2)
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, again incided on the polarizing beam splitter mirror from the residual pump light of described laser crystal outgoing by described a plurality of mirror reflects, and described residual pump light needed through described half-wave plate before again inciding polarizing beam splitter mirror from penetrating described laser crystal, the described residual pump light that again incides on the described polarizing beam splitter mirror is entered described laser crystal by reflection again, the front/rear end of described laser crystal all is coated with the anti-reflection film of described pump light, on the laser emitting end face of laser crystal and on light path, be coated with the anti-reflection film of laser crystal laser from the first nearest speculum of this outgoing end face, and on the optical axis direction of laser crystal, be provided with the chamber mirror of described laser crystal than the farther position of described the first speculum.
2. 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 again in laser crystal, penetrating laser crystal from described remaining pump light needed through half-wave plate before again inciding described polarizing beam splitter mirror, the described residual pump light that again incides on the polarizing beam splitter mirror is entered described laser crystal again by described polarizing beam splitter mirror reflection, the front/rear end of described laser crystal all is coated with the anti-reflection film of described pump light, on the laser emitting end face of laser crystal and on light path, be coated with the anti-reflection film of laser crystal laser from the first nearest speculum of this outgoing end face, and on the optical axis direction of laser crystal, be provided with the chamber mirror of described laser crystal than the farther position of described the first speculum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101627810A CN102244346B (en) | 2011-06-14 | 2011-06-14 | End-pumped laser utilizing half-wave plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101627810A CN102244346B (en) | 2011-06-14 | 2011-06-14 | End-pumped laser utilizing half-wave plates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102244346A CN102244346A (en) | 2011-11-16 |
| CN102244346B true CN102244346B (en) | 2013-03-13 |
Family
ID=44962265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101627810A Expired - Fee Related CN102244346B (en) | 2011-06-14 | 2011-06-14 | End-pumped laser utilizing half-wave plates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102244346B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| US11258230B2 (en) * | 2017-11-08 | 2022-02-22 | Lumentum Operations Llc | Pump isolation by polarization splitting |
| CN107749554B (en) * | 2017-11-24 | 2019-10-22 | 武汉华星光电半导体显示技术有限公司 | Excimer laser processing unit and its laser collection device |
| 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 |
| CN113285339A (en) * | 2021-05-19 | 2021-08-20 | 张振国 | Polarization output ring resonator with tunable output rate and adjustable output mirror |
| CN113285338A (en) * | 2021-05-19 | 2021-08-20 | 张振国 | Method for improving pump light absorption efficiency of non-polarized absorption gain medium |
| 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 |
Family Cites Families (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 |
| CN101777724B (en) * | 2009-12-25 | 2012-01-18 | 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 |
-
2011
- 2011-06-14 CN CN2011101627810A patent/CN102244346B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102244346A (en) | 2011-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102244346B (en) | End-pumped laser utilizing half-wave plates | |
| US20100215063A1 (en) | Pulse laser apparatus | |
| TW201103217A (en) | Intracavity harmonic generation using a recycled intermediate harmonic | |
| RU2013125757A (en) | LASER AMPLIFIER CIRCUIT DIAGRAM | |
| CN216850735U (en) | Narrow-linewidth dual-wavelength solid laser | |
| CN101483317A (en) | Pump mode for semiconductor laser | |
| CN104953457B (en) | The alternately device of output dual wavelength adjusting Q pulse laser | |
| CN110797750A (en) | Optical parametric oscillator for outputting dual-wavelength mid-infrared light | |
| CN103236633B (en) | 3-5-micron waveband intermediate infrared solid laser | |
| CN110277726B (en) | Acousto-optic Q-switched ultraviolet laser | |
| CN102610992B (en) | Method for realizing high absorption efficiency of Nd:YAG laser for pumping light | |
| CN104600552A (en) | Monocrystalline-diamond continuous wave tunable deep ultraviolet laser | |
| CN102263364B (en) | Transverse plane pump laser capable of high efficiently using pump light | |
| CN102868089A (en) | Device and method of using single-grating external cavity feedback to realize beam combination of multiple semiconductor lasers | |
| CN108512027B (en) | Annular cavity amplifying device for picosecond seed laser pulse | |
| CN103972786B (en) | A kind of amplifier architecture | |
| CN102916327A (en) | Total reflection type slab laser amplifier | |
| CN102544995A (en) | Green laser | |
| CN202840237U (en) | Device using single grating external cavity feedback to realize multiple semiconductor laser beam combining | |
| CN103066491A (en) | High-repetition frequency blue violet laser | |
| CN210379757U (en) | Tunable purple light pulse laser | |
| CN113078542A (en) | Orthogonal polarization dual-wavelength optical path staggered decompression Q-switched laser and method based on Nd, MgO and LN | |
| CN101567516A (en) | Q-switched laser | |
| CN101710666A (en) | Semiconductor laser pump single longitudinal mould and frequency laser | |
| KR101207080B1 (en) | Double-pass Singly-Resonant Optical Parametric Oscillator laser system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20150614 |
|
| EXPY | Termination of patent right or utility model |