CN100461556C - Bimirror nonplanar ring laser for one-point output multi-point end face pumping - Google Patents
Bimirror nonplanar ring laser for one-point output multi-point end face pumping Download PDFInfo
- Publication number
- CN100461556C CN100461556C CNB2005101091757A CN200510109175A CN100461556C CN 100461556 C CN100461556 C CN 100461556C CN B2005101091757 A CNB2005101091757 A CN B2005101091757A CN 200510109175 A CN200510109175 A CN 200510109175A CN 100461556 C CN100461556 C CN 100461556C
- Authority
- CN
- China
- Prior art keywords
- laser
- output
- gain medium
- pumping
- plane
- 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
Abstract
One piece of output coupling lens and one piece of laser gain medium form resonant cavity of laser. The coupling lens is a concave spherical mirror; and inner surface of the laser gain medium is a plane, and the outer surface is a convex spherical surface. Anti-reflection film is coated on the plane. Reflective coating, which is total reflection for laser generated from cavity, and high transmissive for LD pumping light, is coated on the convex surface. There are multiple reflection points on the convex spherical surface. End face pumping is carried out for each reflection point by a LD. reflective coating with two reflectivities is coated on concave spherical mirror of the coupling lens so as to divide the reflective coating into output section and reflection section. The output section is corresponding section for only receiving light beam with only one reflection point, and other part in reflection section. Features are: output power of single light beam, and reducing heat effect.
Description
Technical field
The invention belongs to laser technology field, the particularly belt laser structure design of bimirror on-plane surface.
Background technology
General, all solid state laser is only exported beam of laser from output coupling mirror and is beneficial to use.In most cases, the laser beam that all solid state laser produces only has a pip on output coupling mirror, and in this pip output beam of laser, then power output all concentrates in this light beam, helps using.
In all solid state laser of semiconductor laser (LD) end-pumping, the radiation laser beam of LD can well mate with the pattern of the laser beam that produces in the chamber, obtain higher pumping efficiency and better beam quality. but all solid state laser of common end-pumping has serious thermal effect when pumping light power is big, laser performance is reduced, even can damage gain medium.When the restriction that is subjected to the gain medium thermal effect when the power that carries out end-pumping LD at a point should not increase again, can continue to improve power output by the number that increases pumping point, both ends of the surface optically pumped laser as shown in Figure 1, it constitutes " L " type resonant cavity by three speculums 12,13,14, can be respectively from both direction 15,16 couples of gain medium 11 usefulness LD carry out end-pumping simultaneously, have improved draw power, thereby improve power output.But the number of this laser end face pumping LD only is two, can not further increase, and has limited the further raising of power output.
In order further to increase the LD number that is used for end-pumping in the laser, the present application people has proposed the belt laser (number of patent application: CN03146397.5) of a kind of multiend-pumped bimirror on-plane surface, the structure of one 3 the belt lasers of end-pumping bimirror on-plane surface is wherein disclosed, as shown in Figure 2, this laser resonant cavity is made of an output coupling mirror 21 and a gain medium 23.Described output coupling mirror has a concave spherical surface 22, and being coated with on the described concave spherical surface 22 the generation laser reflectivity is 98% equally distributed reflectance coating.Described gain medium 23 has a plane 26 and a protruding sphere 25.Be coated with the anti-reflection film that generation laser is had high-transmission rate (T〉99.5%) on the described plane 26, plating is to the laser total reflection that produces in the chamber (R〉99.8%), simultaneously to the reflectance coating of the high transmission of LD pumping light (T〉95%) on the described protruding sphere 25.The determined straight line in summit of described concave spherical surface 22 and described protruding sphere 25 is a chamber axle 29.Distance between two sphere summits is exactly the chamber axial length of this laser.The laser beam that laser produced is advanced along on-plane surface belt line 27, and three pips are arranged on the protruding sphere 25 of gain medium 23, and described three pips constitute one on described protruding sphere be the equilateral triangle at center with the chamber axle.Carry out end-pumping with three LD28 respectively at these three pips.This laser can improve power output, reduces thermal effect.The laser beam that is produced in this laser has two relative directions of propagation, thereby from six outgoing laser beams 24 of output coupling mirror 21 outputs.Also can carry out the multiple spot pumping by the parameter of resonant cavity being selected be provided with 4,5,6 even the pip of the multiple number of dozens of.But laser each pip on output coupling mirror that produces all has laser power output, and this will disperse power output, is unfavorable for using.
In addition, need to use mode-locked laser to produce ultrashort pulse in some fields such as ultrafast optics, its repetition rate is generally hundred megahertzes, needs to use long laserresonator.For example repetition rate is the mode-locked laser of 150MHz, and the length of its resonant cavity is 1 meter.Because this type of laser chamber is longer, overall dimension is bigger, and its commercial product is general to adopt many refrative cavities to reduce device size.Many refrative cavities folding times is many more, and the extra speculum that increases is just many more, and its structure is complicated more, and stability is poor more.
Summary of the invention
The objective of the invention is for overcoming the weak point of prior art, propose a kind of belt laser of bimirror on-plane surface of single-point output multiend-pumped, not only can improve power output, reduce thermal effect, and simplified structure, stability improved, realize the single beam power output, help using.
The belt laser of bimirror on-plane surface of a kind of single-point output multiend-pumped that the present invention proposes, constitute resonant cavity by an output coupling mirror and a gain medium, described output coupling mirror is a concave spherical mirror, the inner surface of described gain medium is the plane, and outer surface is protruding sphere; Be coated with the anti-reflection film that generation laser is had high-transmission rate on the plane of described gain medium, plating is to the laser total reflection that produces in the chamber, simultaneously to the reflectance coating of the high transmission of LD pumping light on the protruding sphere of described gain medium; On the protruding sphere of gain medium, a plurality of pips are arranged, carry out end-pumping with a LD at this each pip; It is characterized in that, be coated with the reflectance coating of two kinds of reflectivity on the concave spherical surface of described output coupling mirror, this reflectance coating is divided into output area and echo area, this output area is for only receiving the corresponding region of the light beam of a pip, and other parts are the echo area.Said structure is the output of single-point dual-beam.
On the basis of said structure, add a light isolator in any light path in described resonant cavity, then laser only therein a direction of propagation produce oscillating laser, output coupling mirror is only exported an output beam.
Characteristics of the present invention and effect:
The present invention improves the structure of the belt laser of existing multiend-pumped bimirror on-plane surface, be coated with the reflectance coating of two kinds of reflectivity on the concave spherical surface with output coupling mirror, realized the output of single-point dual-beam, and further in resonant cavity, add a light isolator, realized the output of single-point single beam.
Single-point output multiend-pumped bimirror on-plane surface of the present invention goes in ring laser when guaranteeing high pumping efficiency, has improved laser output power, reduces the laser working medium influence of thermal effect, and has realized energy concentration output.
Structure of the present invention also is adapted to need to use mode-locked laser to produce the occasion of ultrashort pulse in some fields such as ultrafast optics, and its physical dimension is significantly reduced, and simple in structure, and stability is high.
Description of drawings
Fig. 1 is an existing both ends of the surface optically pumped laser structural representation.
Fig. 2 is the structure side view of the belt laser of existing 3 end-pumping bimirror on-plane surfaces, and the belt pip number of closed light path on output coupling mirror of on-plane surface is three among the figure.
Fig. 3 a is a single-point dual-beam output multiend-pumped laser structure schematic diagram of the present invention.
Fig. 3 b is a kind of concrete plated film mode schematic diagram of output coupling mirror of single-point dual-beam output multiend-pumped laser of the present invention.
Fig. 4 a is a single-point single beam output multiend-pumped laser structure schematic diagram of the present invention.
Fig. 4 b is a kind of concrete plated film mode schematic diagram of output coupling mirror of single-point single beam output multiend-pumped laser of the present invention.
Embodiment
The belt laser of single-point output multiend-pumped bimirror on-plane surface that the present invention proposes reaches attached circle in conjunction with the embodiments and is described in detail as follows:
Embodiments of the invention 1 are the belt lasers of 3 end-pumping bimirror on-plane surfaces of a single-point dual-beam output, its structure is shown in Fig. 3 a, the basic structure of this laser resonant cavity is identical with the belt laser of 3 end-pumping bimirror on-plane surfaces of existing six light beams output, and an output coupling mirror 31 and a gain medium 33 of being 25 millimeters by diameter constitute.It is 50 millimeters concave spherical surface 32 that described output coupling mirror has a radius of curvature, 3 millimeters of described gain medium 33 center thicknesses, and it is 50 millimeters protruding sphere 35 that a plane 36 and radius of curvature are arranged.Be coated with the anti-reflection film that generation laser is had high-transmission rate (T〉99.5%) on the described plane 36, plating is to the laser total reflection that produces in the chamber (R〉99.8%), simultaneously to the reflectance coating of the high transmission of LD pumping light (T〉95%) on the described protruding sphere 35.The determined straight line in summit of described concave spherical surface 32 and described protruding sphere 35 is a chamber axle 39.The length of the summit line of described concave spherical surface 32 and described protruding sphere 35 is exactly the chamber axial length of this laser, is 18.4 millimeters.The laser beam 37 that laser produced is advanced along on-plane surface belt line 37, three pips are arranged on the protruding sphere 35 of gain medium 33, the distance of described three pips and chamber axle 39 is 6 millimeters, and constituting one on 35 on the protruding sphere of mirror is the equilateral triangle at center with the chamber axle.Carry out end-pumping with three LD 28 respectively at these three pips, can improve power output, reduce thermal effect.Be unfavorable for the problem used for solving existing multiple spot output, present embodiment changes the even distribution of output coupling mirror concave spherical surface reflectance coating reflectivity in the existing laser, designs a kind of reflectance coating and has the output coupling mirror that two kinds of reflectivity distribute, shown in Fig. 3 b.The concave spherical surface 32 of output coupling mirror 31 is divided into two zones according to the reflectivity difference of reflectance coating: zone 321 is fan-shaped for 345 ° at central angle, rete is high reflection (R〉99.8%) to the laser that produces in the chamber on it, zone 322 is the fan-shaped of 15 ° at central angle, and rete is part transmission (T=5%) to the laser that produces in the chamber on it.The laser beam 37 that described laser produces has three pips on described output coupling mirror 31, wherein have and only have a pip to be in zone 322, and this pip is the laser power output point; All the other pips all are on the highly reflecting films, will not have laser output at these some places.Because the laser beam that produced in the described ring laser this moment has two relative directions of propagation, from two outgoing laser beams 34 of output coupling mirror 31 outputs.
Embodiments of the invention 2 are the belt lasers of 3 end-pumping bimirror on-plane surfaces of a single-point single beam output, its structure is shown in Fig. 4 a, with the main difference part of embodiment 1 is to add a light isolator 40 in the laser resonant cavity of embodiment 1 in any light path, and guaranteeing only to make beam of laser by described smooth isolator (can realize) by adjusting to design of light isolator cross sectional dimensions and position, described smooth isolator 40 comprises a half-wave plate 401 and a Faraday rotator 402 of being made up of the TGG crystal that is placed in the magnetic field.Described Faraday rotator 402 make pass through 7 ° of the polarization direction rotations of laser.The concave spherical surface 42 of output coupling mirror 41 is divided into two zones according to the reflectivity difference of reflectance coating among the embodiment 2, shown in Fig. 4 b: zone 422 is border circular areas of 5 millimeters of diameters, rete is part transmission (T=5%) to the laser that produces in the chamber on it, zone 422 also can be other arbitrary shape, zone 421 be on the concave spherical surface 42 except that the remainder in zone 422, rete reflects (R〉99.8%) to the laser that produces in the chamber for height it on.The laser beam 47 that laser produces has three pips on described output coupling mirror 41, (zone 422 also can be other arbitrary shape wherein to have and only have a pip to be in zone 422, as triangle, square, rectangle, ellipse etc., have and only have a pip to be in this zone as long as guarantee), this pip is unique laser power output point; All the other pips all are on the highly reflecting films, will not have laser output at these some places.Owing to added a light isolator 40 in the chamber, laser only therein a direction of propagation produce oscillating laser, output beam 44 of 41 output of output coupling mirror,
Single-point single beam output multiend-pumped bimirror on-plane surface of the present invention goes in ring laser when guaranteeing high pumping efficiency, has improved laser output power, reduces the laser working medium influence of thermal effect, and has realized energy concentration output.
Claims (2)
1. the bimirror on-plane surface of the single-point output multiend-pumped laser that goes in ring, constitute resonant cavity by an output coupling mirror and a gain medium, described output coupling mirror is a concave spherical mirror, and the inner surface of described gain medium is the plane, and outer surface is protruding sphere; Be coated with the anti-reflection film that generation laser is had high-transmission rate on the plane of described gain medium, plating is to the laser total reflection that produces in the chamber, simultaneously to the reflectance coating of the high transmission of LD pumping light on the protruding sphere of described gain medium; On the protruding sphere of gain medium, a plurality of pips are arranged, at this each pip with a capable end-pumping of LD; It is characterized in that, be coated with the reflectance coating of two kinds of different reflectivities on the concave spherical surface of described output coupling mirror, this reflectance coating is divided into output area and echo area, this output area is for only receiving the corresponding region of the light beam of a pip, and other parts are the echo area.
2. the belt laser of bimirror on-plane surface of single-point output multiend-pumped as claimed in claim 1 is characterized in that, adds a light isolator in any light path in described resonant cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101091757A CN100461556C (en) | 2005-10-20 | 2005-10-20 | Bimirror nonplanar ring laser for one-point output multi-point end face pumping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101091757A CN100461556C (en) | 2005-10-20 | 2005-10-20 | Bimirror nonplanar ring laser for one-point output multi-point end face pumping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1776975A CN1776975A (en) | 2006-05-24 |
| CN100461556C true CN100461556C (en) | 2009-02-11 |
Family
ID=36766339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101091757A Expired - Fee Related CN100461556C (en) | 2005-10-20 | 2005-10-20 | Bimirror nonplanar ring laser for one-point output multi-point end face pumping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100461556C (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS605578A (en) * | 1984-05-30 | 1985-01-12 | Matsushita Electric Ind Co Ltd | Output coupling mirror |
| CN1477738A (en) * | 2003-07-11 | 2004-02-25 | 清华大学 | Double-mirror ring travelling-wave laser |
-
2005
- 2005-10-20 CN CNB2005101091757A patent/CN100461556C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS605578A (en) * | 1984-05-30 | 1985-01-12 | Matsushita Electric Ind Co Ltd | Output coupling mirror |
| CN1477738A (en) * | 2003-07-11 | 2004-02-25 | 清华大学 | Double-mirror ring travelling-wave laser |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1776975A (en) | 2006-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2517963C1 (en) | Disc-shaped solid laser | |
| US4050036A (en) | Optical system for lasers | |
| US4433418A (en) | Off-axis astigmatic unstable laser resonator | |
| KR100267126B1 (en) | Compact diode pumped solid state laser | |
| CN205790924U (en) | A kind of pyramid formula many strokes pumping video disc laser instrument | |
| CN106684687B (en) | A kind of disc solid laser amplifier | |
| US5432811A (en) | Laser rod with polyhedron shaped ends | |
| CN103311789A (en) | Thin laser medium laser device | |
| CN100461556C (en) | Bimirror nonplanar ring laser for one-point output multi-point end face pumping | |
| JP2007511081A (en) | Optically pumped semiconductor laser device | |
| CN109510056B (en) | A kind of while output the hollow laser of dual wavelength | |
| CN210182771U (en) | Light beam near-field intensity distribution self-homogenizing high-energy laser | |
| JP2000506676A (en) | Optical resonator with helical optical element | |
| CN110380327A (en) | Light beam near-field intensity distribution self-homogenizing high-energy laser | |
| CN104717019A (en) | High-precision collimation optical antenna transmitting system capable of loading radial radiation light source | |
| CN202025978U (en) | Unstable resonant cavity used for transverse flow carbon dioxide laser | |
| CN104577681A (en) | Axial cone, optical resonator and laser device | |
| CN103904536B (en) | Laser instrument | |
| CN1332482C (en) | Unstable laser cavity tunned by grating | |
| CN104300348A (en) | Inner conical W-shaped combined lens structure used for selecting angular polarization | |
| CN201323376Y (en) | Inner cavity frequency-doubling blue light optical-fiber laser | |
| CN109659803B (en) | high-polarization-purity polarization-direction-adjustable rotationally-symmetric polarization hollow laser | |
| CN100373712C (en) | Laser-beam group-beam composite plate chamber | |
| CN110600980B (en) | Thin tube laser beam quality self-compensation method | |
| CN103904537B (en) | Laser instrument |
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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090211 Termination date: 20091120 |