CN201413926Y - Solid laser with frequency doubling crystal and optical fiber pump arrangement - Google Patents

Solid laser with frequency doubling crystal and optical fiber pump arrangement Download PDF

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Publication number
CN201413926Y
CN201413926Y CN2009201530404U CN200920153040U CN201413926Y CN 201413926 Y CN201413926 Y CN 201413926Y CN 2009201530404 U CN2009201530404 U CN 2009201530404U CN 200920153040 U CN200920153040 U CN 200920153040U CN 201413926 Y CN201413926 Y CN 201413926Y
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China
Prior art keywords
gain media
eye
truncated cone
bull
laser
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Expired - Fee Related
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CN2009201530404U
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Chinese (zh)
Inventor
任芝
李松涛
张晓宏
关荣华
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North China Electric Power University
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North China Electric Power University
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Abstract

The utility model discloses a solid laser with a frequency doubling crystal and an optical fiber pump arrangement. The solid laser comprises a plurality of laser diodes, a circular convex lens and a round table-shaped gain medium, wherein the plurality of laser diodes are arranged in a plane; the circular convex lens is positioned between the round table-shaped gain medium and the plane where theplurality of laser diodes are arranged; each output end of the plurality of laser diodes is connected with an optical fiber, the other ends of the optical fibers are integrated into a beam, and the tail end of the integrated beam is provided with a convergent lens that is positioned between the circular convex lens and the tail end of the integrated beam; the distance between the convergent lens and the circular convex lens is more than the sum of the focal distances of the convergent lens and the circular convex lens; the focal distance of the circular convex lens is more than the length of the round table-shaped gain medium, a cross section of the round table-shaped gain medium with large area is positioned at one side close to the circular convex lens, the cross section with large areais parallel to the circular convex lens mutually and the diameter of the cross section of the round table-shaped gain medium with large area is equal to that of the circular convex lens; and the gainmedium and the circular convex lens are placed in a contact way.

Description

The solid state laser of frequency-doubling crystal and optical fiber pump arrangement
Technical field
The utility model relates to a kind of optical fiber pump arrangement, particularly a kind of solid state laser that uses this pump arrangement with frequency-doubling crystal, and medium wherein is a truncated cone-shaped.
Background technology
Use end-pumped solid-state laser, comprise that wherein using lens to be coupled for pump light belongs to technology well known in the art, what pump light source wherein adopted is laser diode or other suitable pumping sources, solid state gain medium is selected different dielectric materials for use according to required Wavelength of Laser, the crystal such as YAG that picture is known all are that those skilled in the art often adopt, wherein the shape of gain media generally all is a round bar shape, perhaps adopt rectangle, cross section wherein is rectangle or square, be provided with cooling system around the gain media, comprise water-cooled and air-cooled, and other suitable cooling devices, but this traditional pump mode and gain media form are easy to generate a problem, be exactly between the internal layer of gain media and skin because the inhomogeneous of the inhomogeneous and cooling of pumping can produce temperature difference, temperature difference in the gain media can produce a lot of problems, for example can produce injury to gain media itself, suppress the raising of laser output power, particularly because the temperature difference also can produce refringence in that gain media is inner, thereby exert an influence for the laser operational mode.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of solid state laser with optical fiber pump arrangement, the gain media of this laser has the structure of truncated cone-shaped, can improve the uniformity of pumping to a great extent, thereby reduce the temperature difference of gain media, with the various influences that reduce to bring by temperature difference.
The purpose of this utility model is achieved through the following technical solutions:
A kind of solid state laser with optical fiber pump arrangement, comprise a plurality of laser diodes, the gain media of bull's-eye and truncated cone-shaped, described a plurality of laser diode is arranged in the plane, described bull's-eye is between the plane at truncated cone-shaped gain media and described a plurality of laser diodes place, wherein, the output of each in described a plurality of laser diode all is connected with an optical fiber, the integrated bundle of an other end of these optical fiber, end at this integrated bundle has convergence lens, this convergent lens is between described bull's-eye and described integrated bundle end, distance between described convergent lens and the described bull's-eye is greater than the focal length sum of the focal length and the described bull's-eye of described convergent lens, the focal length of described bull's-eye is greater than the length of described truncated cone-shaped gain media, the gain media of described truncated cone-shaped have a side that the larger area cross section is positioned at bull's-eye, this has the larger area cross section and described bull's-eye is parallel to each other, and the diameter with larger area cross section of described truncated cone-shaped gain media and the equal diameters of described bull's-eye, described gain media is placed in the mode that contacts with described bull's-eye.
The pump light that sends from described a plurality of laser diodes shines on the described convergent lens through the form with integrated optical source after the fiber optic conduction, this convergent lens is assembled described pump light, assembling later pump light is shining on the described bull's-eye with the form of dispersing after assembling the arrival focus, the pump light that bull's-eye will have divergence form is converged to a circular cone once more, the photocentre of described convergent lens, the photocentre of described bull's-eye and described truncated cone-shaped gain media central axis are point-blank, described truncated cone-shaped gain media is with identical shaped, the mode of identical size overlaps fully with the part of described circular cone, this laser also comprises a frequency-doubling crystal, is used for the laser that the truncated cone-shaped gain media produces is carried out frequency multiplication to obtain frequency doubled light.
By the way solid state gain medium is carried out the uniformity that pumping can significantly improve pumping.Because gain media has adopted truncated conical shape, and pump light is to incide in the gain media with identical shape, reduce with regard to having eliminated the energy that pump light causes along with the increase of propagation distance forward like this, thereby eliminated the pumping inhomogeneities of gain media front and back end, because though pump light can weaken along with the increase of propagation distance forward, but because the sectional area of pump light is also reducing, thereby offset the reduction of unit are self-energy, simultaneously because the optical fiber of conduction pump light is integrated bundle at output, become energy density later on through two Transformation of Lens and in the cross section, be equally distributed pump light, based on above-mentioned 2 reasons, realized the uniformity of laser in the inner pumping of whole gain media.Particularly adopted optical fiber structure,, enlarged the applied environment of laser simultaneously so just in the stability that has significantly improved system for the conduction of pump light.
Description of drawings
Accompanying drawing 1 is the schematic diagram that the utlity model has the solid state laser of frequency-doubling crystal and optical fiber pump arrangement.
Embodiment
Come the utility model made further describing below in conjunction with accompanying drawing 1, so that superiority of the present utility model is better embodied.
Wherein 1 represent a carrier, be furnished with a plurality of laser diodes on the side of this carrier, the output of each laser diode is connected with an optical fiber, the corresponding multifiber of 2 representatives, the integrated bundle of an other end of multifiber, be used for the pump light that a plurality of laser diodes with carrier 1 side arrangement send and be transmitted to convergent lens 3,4 represent bull's-eye, 5 represent the truncated cone-shaped solid state gain medium, wherein the truncated cone-shaped gain media has larger area cross section and bull's-eye 4 and convergent lens 3 and is parallel to each other, distance between bull's-eye 4 and the convergent lens 3 is greater than both focal length sums, and truncated cone-shaped gain media 5 is placed in the mode that contacts with bull's-eye 4, the pump light that a plurality of laser diodes send is propagated forward with the form of directional light after the output of the integrated bundle of conduction optical fiber, directional light becomes converging light later on through the convergence of convergent lens 3, because the distance between convergent lens 3 and the bull's-eye 4 is greater than their focal length sum, after propagating process bull's-eye 4 forward, become circular cone so assemble pump light afterwards through convergent lens 3, the part that this circular cone is positioned near bull's-eye 4 one sides has and truncated cone-shaped gain media 5 identical shape and sizes, truncated cone-shaped gain media 5 wherein is with identical shaped, the mode of identical size overlaps fully with the part of described circular cone, so just realized that pump light is to enter into truncated cone-shaped gain media inside with truncated cone-shaped gain media 5 identical shapes and size, and be to propagate forward in gain media inside with identical shape of truncated cone-shaped gain media and size, 6 represent frequency-doubling crystal, are used for the laser that laser produces is carried out frequency multiplication to obtain the laser of required wavelength.
Be coated with the pump light transmission on the larger area cross section and the optical thin film of the laser-bounce that produces in to gain media having of truncated cone-shaped gain media 5, the semi-transparent semi-reflecting optical thin film of laser that produces on the cross section that has than small size, being coated with to gain media, form resonant cavity with this, the reflectivity that wherein has than the optical thin film on the cross section of small size can change according to the needs of output laser.

Claims (3)

1. solid state laser with frequency-doubling crystal and optical fiber pump arrangement, comprise a plurality of laser diodes, bull's-eye and truncated cone-shaped gain media, it is characterized in that: described a plurality of laser diodes are arranged in the plane, described bull's-eye is between the plane at truncated cone-shaped gain media and described a plurality of laser diodes place, wherein, the output of each in described a plurality of laser diode all is connected with an optical fiber, the integrated bundle of an other end of these optical fiber, end at this integrated bundle has convergence lens, this convergent lens is between described bull's-eye and described integrated bundle end, distance between described convergent lens and the described bull's-eye is greater than the focal length sum of the focal length and the described bull's-eye of described convergent lens, the focal length of described bull's-eye is greater than the length of described truncated cone-shaped gain media, described truncated cone-shaped gain media have a side that the larger area cross section is positioned at bull's-eye, this has the larger area cross section and described bull's-eye is parallel to each other, and the diameter with larger area cross section of described truncated cone-shaped gain media and the equal diameters of described bull's-eye, described truncated cone-shaped gain media is placed in the mode that contacts with described bull's-eye;
The pump light that sends from described a plurality of laser diodes shines on the described convergent lens through the form with integrated optical source after the fiber optic conduction, this convergent lens is assembled described pump light, assembling later pump light shines on the described bull's-eye with the form of dispersing after arriving focus, the pump light that bull's-eye will have divergence form is converged to a circular cone once more, the photocentre of described convergent lens, the photocentre of described bull's-eye and described truncated cone-shaped gain media central axis are point-blank, described truncated cone-shaped gain media is with identical shaped, and the mode of identical size overlaps fully with the part of described circular cone;
Wherein, this solid state laser also comprises a frequency-doubling crystal, is used for the laser that the truncated cone-shaped gain media produces is carried out frequency multiplication to obtain frequency doubled light.
2. the solid state laser with frequency-doubling crystal and optical fiber pump arrangement as claimed in claim 1, it is characterized in that: the having of described truncated cone-shaped gain media is coated with on the larger area cross section to the pump light transmission and to the optical thin film of the laser-bounce that produces in the gain media, having on the cross section than small size of described truncated cone-shaped gain media is coated with the semi-transparent semi-reflecting optical thin film of the laser that produces in the gain media, forms resonant cavity with this.
3. the solid state laser with frequency-doubling crystal and optical fiber pump arrangement as claimed in claim 2 is characterized in that: having than the reflectivity of the optical thin film on the cross section of small size of described truncated cone-shaped gain media can be adjusted according to the needs of output laser.
CN2009201530404U 2009-05-27 2009-05-27 Solid laser with frequency doubling crystal and optical fiber pump arrangement Expired - Fee Related CN201413926Y (en)

Priority Applications (1)

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CN2009201530404U CN201413926Y (en) 2009-05-27 2009-05-27 Solid laser with frequency doubling crystal and optical fiber pump arrangement

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Application Number Priority Date Filing Date Title
CN2009201530404U CN201413926Y (en) 2009-05-27 2009-05-27 Solid laser with frequency doubling crystal and optical fiber pump arrangement

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101572383B (en) * 2009-05-27 2010-11-10 华北电力大学(保定) Solid laser with optical fiber pump arrangement
CN114966981A (en) * 2022-06-13 2022-08-30 安徽大学 Plastic optical fiber micro lens and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101572383B (en) * 2009-05-27 2010-11-10 华北电力大学(保定) Solid laser with optical fiber pump arrangement
CN114966981A (en) * 2022-06-13 2022-08-30 安徽大学 Plastic optical fiber micro lens and preparation method thereof
CN114966981B (en) * 2022-06-13 2023-09-12 安徽大学 Plastic optical fiber micro lens and preparation method thereof

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C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100224

Termination date: 20120527