CN1885642A - Optical fibre laser and frequency generation red-light device - Google Patents
Optical fibre laser and frequency generation red-light device Download PDFInfo
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- CN1885642A CN1885642A CN 200610043076 CN200610043076A CN1885642A CN 1885642 A CN1885642 A CN 1885642A CN 200610043076 CN200610043076 CN 200610043076 CN 200610043076 A CN200610043076 A CN 200610043076A CN 1885642 A CN1885642 A CN 1885642A
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Abstract
The disclosed device to adding-frequency generate red light with a fiber laser comprises a parallel first/second base-frequency light wave system with an adding-frequency system and emergent light injected to the top/bottom dichroscope respectively. This invention combines fiber laser and nonlinear optics, has well and stable output, and fit to wide application.
Description
Technical field
The invention belongs to laser technology field, relate to fiber laser, the device of particularly a kind of fiber laser and frequency generation red-light.
Background technology
At present the generation mechanism of red laser mainly contains by produced ruddiness, semiconductor diode by the krypton ion gas laser and directly produces ruddiness, produced ruddiness, utilized the conversion of going up of the doubly clad optical fiber of elements such as doping Pr to realize ruddiness output by Solid Laser Elements such as Nd:YVO4/YAG crystal double frequency and ruby lasers.But the krypton ion gas laser is bulky; The ruddiness output quality of semiconductor diode is poor, and price is higher; Solid state laser generation ruddiness mainly adopts laser crystals such as Nd:YVO4/YAG is carried out the output of intracavity frequency doubling realization ruddiness, the structure of straight chamber of general main employing or v-shaped cavity, though volume has had certain compression, output beam quality is also better, but because it has stronger thermal effect, limited the further raising of its power, and needed huge cooling device, so just, increase the complexity of solid state laser apparatus structure, limited the further compression of its volume; And utilize the going up of doubly clad optical fiber of rare earth elements such as doping Pr to change the fiber laser of realizing ruddiness output, though have some advantages of double-clad optical fiber laser, because inherent shortcomings such as the efficient of last switching mechanism is low, poor stability have limited the further raising of its power output.Thereby provide a kind of simple in structure, volume is little, output is stable and good beam quality, high-power red laser generation device have broad application prospects and important scientific value.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides the device of a kind of fiber laser and frequency generation red-light, it is simple in structure, and volume is little, and power is big, the stable and good beam quality of output.
Technical scheme of the present invention is achieved in that
The device of a kind of fiber laser of the present invention and frequency generation red-light, comprise, the first fundamental light wave system is parallel placed side by side with the second fundamental light wave system, setting and frequency system after the first fundamental light wave system and the second fundamental light wave system are on the emergent light difference incident of the first fundamental light wave system and the second fundamental light wave system and the upper end dichroic mirror and lower end dichroic mirror of frequency system.
The described first fundamental light wave system adopts optical fiber laser structure, output wavelength is between 1080-1100nm, and its formation comprises: the first laser diode LD pumping source, first pumping input coupled lens group, front end double color plate, terminal double color plate, first doubly clad optical fiber and the first output collimating lens; First pumping input coupled lens group is set behind the first laser diode LD pumping source, after first pumping input coupled lens group front end double color plate is set, the three is positioned at same collimated light path, the left end of the front end double color plate and first doubly clad optical fiber is pasted, the right-hand member of first doubly clad optical fiber and terminal double color plate are pasted, and the first output collimating lens is set behind the terminal double color plate;
The fine output of this first laser diode LD pumping source magnetic tape trailer, the peak absorbtivity wavelength of the centre wavelength and the first doubly clad optical fiber core material is complementary; This first pumping input coupled lens group adopts non-spherical lens group or micro objective group; This front end double color plate plating is to the pump light high transmittance film, and fundamental wave high-reflecting film between 1080-1100nm, terminal double color plate plate the pump light high-reflecting film, fundamental wave anti-reflection film between 1080-1100nm; This first doubly clad optical fiber adopts Yb doping double-cladding silica fiber as working-laser material; This first output collimating lens adopts single non-spherical lens.
The described second fundamental light wave system adopts optical fiber laser structure, output wavelength is between 1550-1560nm, and its formation comprises: the second laser diode LD pumping source, second pumping input coupled lens group, the second front end double color plate, the second terminal double color plate, second doubly clad optical fiber and the second output collimating lens; Second pumping input coupled lens group is set behind the second laser diode LD pumping source, after second pumping input coupled lens group second front end double color plate is set, the three is positioned at same collimated light path, the left end of the second front end double color plate and second doubly clad optical fiber is pasted, the right-hand member of second doubly clad optical fiber and the second terminal double color plate are pasted, and the second output collimating lens is set behind the second terminal double color plate;
The fine output of this second laser diode LD pumping source magnetic tape trailer, the peak absorbtivity wavelength of the centre wavelength and the second doubly clad optical fiber core material is complementary; This second pumping input coupled lens group adopts non-spherical lens group or micro objective group; This second front end double color plate plates the pump light high transmittance film, fundamental wave high-reflecting film between 1550-1560nm, and the second terminal double color plate plates the pump light high-reflecting film, fundamental wave anti-reflection film between 1550-1560nm; This second doubly clad optical fiber is as working-laser material, the double clad silica fiber that adopts Yb-Er to mix altogether; This second output collimating lens adopts single non-spherical lens.
Described and system frequently, its formation comprises: upper end dichroic mirror, lower end dichroic mirror, condenser lens and crystal, output collimating lens and Amici prism frequently; After the upper end dichroic mirror is arranged in the first fundamental light wave system the first output collimating lens, and with 45 ° of inclination angles placements, set gradually condenser lens and frequency crystal and output collimating lens behind the dichroic mirror of upper end, and four are positioned at same collimated light path, behind the output collimating lens Amici prism is set, after the lower end dichroic mirror is arranged in the second fundamental light wave system the second output collimating lens, and with 45 ° of inclination angles parallel are placed on the upper end dichroiscopic under.
This upper end dichroic mirror plating is to the high transmittance film of 1080-1100nm wave band, and plating is to the high-reflecting film of 1550-1560nm wave band; This lower end dichroic mirror plating is to the high-reflecting film of 1550-1560nm wave band; This condenser lens adopts convex lens; Should and the frequently periodic polarized KTP PPKTP of crystal by adopting or periodic polarized lithium niobate PPLN nonlinear crystal; This output collimating lens is single non-spherical lens; This Amici prism adopts quartz prism.
The present invention adopts fiber laser as the fundamental light wave generation device, have advantages such as volume is little, stable performance, good beam quality, power output height, and used fiber laser is ripe at present Yb doping double-cladding optical fiber laser and Yb-Er co-doped double-clad fiber laser, its output beam quality is good and can realize the high power output that hectowatt grade is above, for the generation of high power red ray laser is laid a good foundation; In addition, nonlinear optical technique development at present rapidly, and periodic polarized KTP PPKTP of the present invention or periodic polarized lithium niobate PPLN are non-linear and crystal frequently, itself and efficient is higher frequently, for the generation of high power red ray laser provides assurance.The present invention effectively combines ripe fiber laser and develops nonlinear optical technique rapidly, be laser display especially laser television, laser medicine, applications such as laser demonstration provide that a kind of volume is little, stable performance, red laser generation device that power output is high.
Description of drawings
Accompanying drawing is a structural representation of the present invention;
Below in conjunction with accompanying drawing content of the present invention is described in further detail.
Embodiment
With reference to shown in Figure 1, structure of the present invention is as follows: the fundamental frequency light of the first fundamental light wave system 1 and 2 outputs of the second fundamental light wave system is respectively along two parallel light path directives and system 3 up and down frequently, setting gradually the first laser diode LD pumping source 1-1 from left to right along the upper end parallel light path, first pumping input coupled lens group 1-2, front end double color plate 1-3a, the three is in same collimated light path, the left end of the front end double color plate 1-3a and the first doubly clad optical fiber 1-4 is pasted, the right-hand member of the first doubly clad optical fiber 1-4 and terminal double color plate 1-3b paste, the first output collimating lens 1-5 is set behind the terminal double color plate 1-3b, upper end dichroic mirror 3-1 is set, terminal double color plate 1-3b behind the first output collimating lens 1-5, the first output collimating lens 1-5 and upper end dichroic mirror 3-1 are positioned at same collimated light path; Setting gradually the second laser diode LD pumping source 2-1 from left to right along the lower end parallel light path, second pumping input coupled lens group 2-2, the second front end double color plate 2-3a, the three is in same collimated light path, the left end of the second front end double color plate 2-3a and the second doubly clad optical fiber 2-4 is pasted, the right-hand member of the second doubly clad optical fiber 2-4 and the second terminal double color plate 2-3b paste, the second output collimating lens 2-5 is set behind the second terminal double color plate 2-3b, lower end dichroic mirror 3-2 is set, the second terminal double color plate 2-3b behind the second output collimating lens 2-5, the second output collimating lens 2-5 and lower end dichroic mirror 3-2 are positioned at same collimated light path; Lower end dichroic mirror 3-2 with 45 ° of inclination angles be placed in parallel in upper end dichroic mirror 3-1 under, with the center of lower end light path vertical reflection to upper end dichroic mirror 3-1, vertical reflection once more and upper end light path through upper end dichroic mirror 3-1 are closed bundle, upper end dichroic mirror 3-1 is placed in parallel in directly over the dichroic mirror 3-2 of lower end with 45 ° of inclination angles, its front end is provided with the first output collimating lens 1-5, its rear end sets gradually condenser lens 3-3 and frequency crystal 3-4 and output collimating lens 3-5, and five are positioned at same collimated light path, behind the output collimating lens 3-5 Amici prism 3-6 are set.
The concrete course of work: in the first fundamental light wave system 1, the pump light that the first laser diode LD pumping source 1-1 produces focuses on end face by first pumping input coupled lens group 1-2 coupling and is pasted with in the first doubly clad optical fiber 1-4 inner cladding of double color plate, excite this doubly clad optical fiber, and in the F-P chamber that is constituted by front end double color plate 1-3a, the first doubly clad optical fiber 1-4 and terminal double color plate 1-3b, form the high power fundamental frequency light generation that centre wavelength is 1100nm, after terminal double color plate 1-3b exports this fundamental frequency light; In like manner, the pump light that the second laser diode LD pumping source 2-1 produces in the second fundamental light wave system 2 focuses on end face by second pumping input coupled lens group 2-2 coupling and posts in the inner cladding of the second doubly clad optical fiber 2-4 of double color plate, excite this doubly clad optical fiber, and in the F-P chamber that is constituted by the second front end double color plate 2-3a, the second doubly clad optical fiber 2-4 and the second terminal double color plate 2-3b, form the high power fundamental frequency light generation that centre wavelength is 1560nm, after the second terminal double color plate 2-3b exports the fundamental frequency light of this wave band; The output beam difference directive of the first fundamental light wave system 1 and the second fundamental light wave system 2 and the upper end dichroic mirror 3-1 and the lower end dichroic mirror 3-2 of frequency system 3, through 1100nm fundamental frequency optical transmission effect and the lower end dichroic mirror 3-2 of upper end dichroic mirror 3-1 to 1 output of the first fundamental light wave system, upper end dichroic mirror 3-1 realizes that at dichroic mirror 3-1 place, upper end the light beam of two fundamental frequency light synthesizes after to the vertical reflection effect of the 1560nm fundamental frequency light of the second fundamental light wave system, 2 outputs, should comprise 1100nm and two wave bands of 1560nm by synthetic light beam, the coupling focussing force of line focus lens 3-3 is coupled to and frequently in the crystal 3-4, utilize nonlinear effect realization and frequency with the frequency crystal, produce the red laser of centre wavelength at 645nm, after incide Amici prism 3-6 behind the output collimating lens 3-5 collimation, realization separates with basic frequency laser, obtains the red laser output of 645nm.
The described first fundamental light wave system 1 adopts optical fiber laser structure, output center wavelength is 1100nm, and its formation comprises: the first laser diode LD pumping source 1-1, first pumping input coupled lens group 1-2, front end double color plate 1-3a, terminal double color plate 1-3b, the first doubly clad optical fiber 1-4 and the first output collimating lens 1-5; The fine output of this first laser diode LD pumping source 1-1 magnetic tape trailer, output facula is 800um, and numerical aperture is 0.22, and peak power output is 35W, and centre wavelength is at 975nm, is complementary with the peak absorbtivity wavelength of the first doubly clad optical fiber 1-4 core material; This first pumping input coupled lens group 1-2 adopts the non-spherical lens group; This front end double color plate 1-3a plating is to 975nm high transmittance film (transmitance＞99%), and 1100nm high-reflecting film (reflectivity＞98%), terminal double color plate 1-3b plate 975nm high-reflecting film (reflectivity＞99%), 1100nm anti-reflection film (transmitance=90%); This first doubly clad optical fiber 1-4 is as working-laser material, adopt Yb doping D shape double clad silica fiber, inner cladding is of a size of 350/400um, numerical aperture is 0.46, core diameter is 25um, and numerical aperture is 0.12, and doping content is 6000PPM, length is 20m, and this first output collimating lens 1-5 is single non-spherical lens.
The described second fundamental light wave system 2 adopts optical fiber laser structure, output center wavelength is 1560nm, and its formation comprises: the second laser diode LD pumping source 2-1, second pumping input coupled lens group 2-2, the second front end double color plate 2-3a, the second terminal double color plate 2-3b, the second doubly clad optical fiber 2-4 and the second output collimating lens 2-5; The fine output of this second laser diode LD pumping source 2-1 magnetic tape trailer, output facula is 800um, and numerical aperture is 0.22, and peak power output is 25W, and centre wavelength is at 975nm, is complementary with the peak absorbtivity wavelength of the second doubly clad optical fiber 2-4 core material; This second pumping input coupled lens group 2-2 adopts the non-spherical lens group; This second front end double color plate 2-3a plates 975nm high transmittance film (transmitance＞99%), 1560nm high-reflecting film (reflectivity＞98%), and the second terminal double color plate 2-3b plates 975nm high-reflecting film (reflectivity＞99%), 1560nm anti-reflection film (transmitance=90%); This second doubly clad optical fiber 2-4 is as working-laser material, the D shape double clad silica fiber that adopts Yb-Er to mix altogether, inner cladding is of a size of 350/400um, and numerical aperture is 0.48, and core diameter is 25um, numerical aperture is 0.18, length is 20m, and the Yb ion is as sensitized ions, the absorptive pumping radiation, and shift by energy and to excite the Er ion, this second output collimating lens 2-5 is single non-spherical lens.
Described and system 3 frequently, its formation comprises: upper end dichroic mirror 3-1, lower end dichroic mirror 3-2, condenser lens 3-3 and crystal 3-4, output collimating lens 3-5 and Amici prism 3-6 frequently; This upper end dichroic mirror 3-1 is 45 ° of inclination angles and places, and plates to 1100nm high transmittance film (transmissivity＞99.8%) 1560nm high-reflecting film (reflectivity＞99.9%); This lower end dichroic mirror 3-2 is 45 ° of inclination angles and places, and plating is to 1560nm high-reflecting film (reflectivity＞99.9%); This condenser lens 3-3 adopts convex lens; Should adopt periodic polarized KTP PPKTP nonlinear crystal with frequency crystal 3-4; This output collimating lens 3-5 is single non-globe lens; This Amici prism 3-6 adopts quartz prism, will separate with basic frequency laser with ruddiness frequently.
The high power red ray laser that the exportable several watts of levels of the fiber laser of this example and the device of frequency generation red-light are above, and efficient is higher, good beam quality, and volume is little, is desirable red laser source.
Claims (7)
1, the device of a kind of fiber laser and frequency generation red-light, comprise the first fundamental light wave system (1), it is characterized in that, the first fundamental light wave system (1) is parallel placed side by side with the second fundamental light wave system (2), the first fundamental light wave system (1) and back setting of the second fundamental light wave system (2) and frequency system (3) are on the emergent light difference incident of the first fundamental light wave system (1) and the second fundamental light wave system (2) and the upper end dichroic mirror (3-1) and lower end dichroic mirror (3-2) of frequency system (3).
2, the device of a kind of fiber laser according to claim 1 and frequency generation red-light, it is characterized in that, the described first fundamental light wave system (1) comprises, the first laser diode LD pumping source (1-1), first pumping input coupled lens group (1-2), front end double color plate (1-3a), terminal double color plate (1-3b), first doubly clad optical fiber (1-4) and the first output collimating lens (1-5); First pumping input coupled lens group (1-2) is set behind the first laser diode LD pumping source (1-1), after first pumping input coupled lens group (1-2) front end double color plate (1-3a) is set, the three is positioned at same collimated light path, front end double color plate (1-3a) is pasted with the left end of first doubly clad optical fiber (1-4), the right-hand member of first doubly clad optical fiber (1-4) and terminal double color plate (1-3b) are pasted, and the first output collimating lens (1-5) is set behind the terminal double color plate (1-3b).
3, the device of a kind of fiber laser according to claim 2 and frequency generation red-light, it is characterized in that, the fine output of first laser diode LD pumping source (1-1) magnetic tape trailer, the peak absorbtivity wavelength of centre wavelength and first doubly clad optical fiber (1-4) core material is complementary; This first pumping input coupled lens group (1-2) adopts non-spherical lens group or micro objective group; This front end double color plate (1-3a) plating is to the pump light high transmittance film, and fundamental wave high-reflecting film between 1080-1100nm, terminal double color plate (1-3b) plate the pump light high-reflecting film, fundamental wave anti-reflection film between 1080-1100nm; This first doubly clad optical fiber (1-4) adopts Yb doping double-cladding silica fiber; This first output collimating lens (1-5) adopts single non-spherical lens.
4, the device of a kind of fiber laser according to claim 1 and frequency generation red-light, it is characterized in that, the described second fundamental light wave system (2) comprises, second laser diode (LD) pumping source (2-1), second pumping input coupled lens group (2-2), the second front end double color plate (2-3a), the second terminal double color plate (2-3b), second doubly clad optical fiber (2-4) and the second output collimating lens (2-5); Second pumping input coupled lens group (2-2) is set behind the second laser diode LD pumping source (2-1), after second pumping input coupled lens group (2-2) the second front end double color plate (2-3a) is set, the three is positioned at same collimated light path, the second front end double color plate (2-3a) is pasted with the left end of second doubly clad optical fiber (2-4), the right-hand member of second doubly clad optical fiber (2-4) and the second terminal double color plate (2-3b) are pasted, and the second output collimating lens (2-5) is set behind the second terminal double color plate (2-3b).
5, the device of a kind of fiber laser according to claim 4 and frequency generation red-light, it is characterized in that, the fine output of second laser diode LD pumping source (2-1) magnetic tape trailer, the peak absorbtivity wavelength of centre wavelength and second doubly clad optical fiber (2-4) core material is complementary; This second pumping input coupled lens group (2-2) adopts non-spherical lens group or micro objective group; This second front end double color plate (2-3a) plating is to the pump light high transmittance film, and fundamental wave high-reflecting film between 1550-1560nm, the second terminal double color plate (2-3b) plate the pump light high-reflecting film, fundamental wave anti-reflection film between 1550-1560nm; The double clad silica fiber that this second doubly clad optical fiber (2-4) adopts Yb-Er to mix altogether; This second output collimating lens (2-5) adopts single non-spherical lens.
6, the device of a kind of fiber laser according to claim 1 and frequency generation red-light, it is characterized in that described and frequency system (3) formation comprises: upper end dichroic mirror (3-1), lower end dichroic mirror (3-2), condenser lens (3-3) and frequency crystal (3-4), output collimating lens (3-5) and Amici prism (3-6); After upper end dichroic mirror (3-1) is arranged in the first fundamental light wave system (1) the first output collimating lens (1-5), and with 45 ° of inclination angles placements, set gradually condenser lens (3-3) and frequency crystal (3-4) and output collimating lens (3-5) behind the upper end dichroic mirror (3-1), and four are positioned at same collimated light path, behind the output collimating lens (3-5) Amici prism (3-6) is set, after lower end dichroic mirror (3-2) is arranged in the second fundamental light wave system (2) the second output collimating lens (2-5), and with 45 ° of inclination angles parallel are placed on upper end dichroic mirror (3-1) under.
7, the device of a kind of fiber laser according to claim 6 and frequency generation red-light is characterized in that, upper end dichroic mirror (3-1) plating is to the high transmittance film of 1080-1100nm wave band, and plating is to the high-reflecting film of 1550-1560nm wave band; This lower end dichroic mirror (3-2) plating is to the high-reflecting film of 1550-1560nm wave band; This condenser lens (3-3) adopts convex lens; Should adopt periodic polarized KTP PPKTP or periodic polarized lithium niobate PPLN nonlinear crystal with frequency crystal (3-4); This output collimating lens (3-5) is single non-spherical lens; This Amici prism (3-6) adopts quartz prism.
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| CN 200610043076 CN1885642A (en) | 2006-06-29 | 2006-06-29 | Optical fibre laser and frequency generation red-light device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201640A (en) * | 2011-04-11 | 2011-09-28 | 北京工业大学 | Watt-stage 1,050nm photonic crystal optical fiber pulse laser device and amplifying system thereof |
| CN103022879A (en) * | 2012-12-21 | 2013-04-03 | 中国工程物理研究院应用电子学研究所 | All solid-state sum frequency sodium beacon laser |
| CN115032847A (en) * | 2022-08-10 | 2022-09-09 | 中国工程物理研究院应用电子学研究所 | Sum frequency light output device |
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2006
- 2006-06-29 CN CN 200610043076 patent/CN1885642A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201640A (en) * | 2011-04-11 | 2011-09-28 | 北京工业大学 | Watt-stage 1,050nm photonic crystal optical fiber pulse laser device and amplifying system thereof |
| CN102201640B (en) * | 2011-04-11 | 2012-07-11 | 北京工业大学 | Watt-stage 1,050nm photonic crystal optical fiber pulse laser device and amplifying system thereof |
| CN103022879A (en) * | 2012-12-21 | 2013-04-03 | 中国工程物理研究院应用电子学研究所 | All solid-state sum frequency sodium beacon laser |
| CN115032847A (en) * | 2022-08-10 | 2022-09-09 | 中国工程物理研究院应用电子学研究所 | Sum frequency light output device |
| CN115032847B (en) * | 2022-08-10 | 2022-11-29 | 中国工程物理研究院应用电子学研究所 | Sum frequency light output device |
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