CN101364700A - Four-path incoherent co-beam MOPA high-capacity laser system - Google Patents
Four-path incoherent co-beam MOPA high-capacity laser system Download PDFInfo
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- CN101364700A CN101364700A CNA2008101572638A CN200810157263A CN101364700A CN 101364700 A CN101364700 A CN 101364700A CN A2008101572638 A CNA2008101572638 A CN A2008101572638A CN 200810157263 A CN200810157263 A CN 200810157263A CN 101364700 A CN101364700 A CN 101364700A
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Abstract
The invention relates to a laser system for four incoherent combined beams MOPA with high power. The laser system is composed of a main oscillation system, a PCM power amplifying system and a reflecting prism, wherein the main oscillation system comprises an oscillator 10, beam splitters 11, 12 and 13 and a main total reflection plane mirror 14; the PCM power amplifying system comprises four amplifying systems 2-1, 2-2, 2-3 and 2-4; each amplifying system is an optical system composed of an SBS phase-conjugation mirror, a convex lens, two amplifiers, a rotator, polarization beam splitters and auxiliary total reflection plane mirrors; optical axes are symmetrically distributed in the positions of the four edges of a rectangular prism; each auxiliary total reflection plane mirror respectively forms an included angle of 45 degrees with the optical axes; each beam splitter is respectively opposite and orthogonal to each polarization beam splitter; each auxiliary total reflection plane mirror is respectively arranged opposite and in parallel to corresponding edge plane total reflection mirrors 31, 32, 33 and 34; and four incoherent laser combined beams. The laser system has the advantages of high laser output power and good beam quality, and is applied in the military field, the industrial field and the like.
Description
Technical field
The invention belongs to a kind of laser output system, four tunnel incoherent bundle MOPA (master oscillator-power amplification) high power laser systems that close based on SBS (stimulated Brillouin scattering) wave distortion compensation principle of specifically a kind of high light beam quality, high power laser light output.
Background technology
We know, at present, the incoherent bundle MOPA system of closing based on the SBS principle adopts the two-way power amplifying system to obtain the mutually perpendicular polarised light in two bundle polarization directions more, make this two bundles incoherent light superposition close bundle again, having a shortcoming but adopt polarizer to close bundle, is exactly that to close Shu Jiguang be two bundles to maximum.At present, the MOPA polarization of the employing SBS that has reported closes beam system, and the output average laser power has reached 500W, but it is very big to continue to improve the power output difficulty.By the applicant's " four-path incoherent Co-beam MOPA laser system " patent in first to file, application number is 2006100444563, partial content ambiguous statement Chu in the former specification and can't realizing.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned the deficiencies in the prior art, and a kind of four-path incoherent co-beam MOPA high-capacity laser system that is combined into a branch of high light beam quality, high-output power by four bundles based on the incoherent laser superposition of SBS is provided
The technical scheme that the present invention solves the problems of the technologies described above employing is: a kind of four-path incoherent co-beam MOPA high-capacity laser system, it is made up of main oscillating system, PCM power amplifying system, reflecting prism, it is characterized in that: main oscillating system by oscillator, down beam splitter, towards left beam splitter, beam splitter, main fully-reflected plane mirror are formed up, down beam splitter, towards left beam splitter, up beam splitter, main fully-reflected plane mirror be distributed on the primary optical axis of oscillator successively and successively respectively towards following, left, last, right tilts and primary optical axis between angle at 45; The PCM power amplifying system is by following, a left side, on, the right wing amplification system is formed, each road amplification system is by the SBS phase-conjugate mirror, single convex lens, the A amplifier, biconvex lens, the B amplifier, circulator, polarizing beam splitter mirror, propping up fully-reflected plane mirror forms, SBS phase-conjugate mirror in each road amplification system, single convex lens, the A amplifier, biconvex lens, the B amplifier, circulator, polarizing beam splitter mirror, propping up fully-reflected plane mirror is distributed on one optical axis successively, the optical axis of each road amplification system is parallel to each other and is be symmetrically distributed successively following four-prism shape of central shaft with the primary optical axis in the main oscillating system, a left side, on, right seamed edge position, a fully-reflected plane mirror of each road amplification system props up optical axis angle at 45 with its place respectively; Described reflecting prism is by following, a left side, on, right faceted pebble completely reflecting mirror is formed, down, a left side, on, each isosceles triangle base of right faceted pebble completely reflecting mirror surrounds the square bottom surface of reflecting prism, down, a left side, on, right faceted pebble completely reflecting mirror is successively respectively towards following, a left side, on, the square bottom surface of right-hand inclination and reflecting prism angle at 45, the center coplane of a fully-reflected plane mirror in the mid point of high line and the Ge Lu amplification system on each faceted pebble completely reflecting mirror isosceles triangle base, the plane, place, center of a fully-reflected plane mirror is vertical with an optical axis of each road amplification system in each road amplification system, a polarizing beam splitter mirror in each road amplification system and an optical axis angle at 45 and parallel with the fully-reflected plane mirror in the optical axis of place; In the main oscillating system down, towards a left side, up beam splitter, main fully-reflected plane mirror successively respectively with down, a left side, go up, the relative and direction quadrature of corresponding polarizing beam splitter mirror in the right wing amplification system, down, a left side, go up, each fully-reflected plane mirror in the right wing amplification system successively respectively with reflecting prism corresponding down, left, upward, right faceted pebble completely reflecting mirror is relative and parallel.
An optical axis of the primary optical axis in the main oscillating system of the present invention and following road amplification system, the amplification system of setting out on a journey, down the high line on the faceted pebble completely reflecting mirror base, go up high line on the faceted pebble completely reflecting mirror base in same plane; An optical axis of primary optical axis in the main oscillating system and left road amplification system, right wing amplification system, the high line on the left faceted pebble completely reflecting mirror base, the high line on the right faceted pebble completely reflecting mirror base are in same plane.
The present invention can obtain the incoherent laser superposition of four bundles by four tunnel amplification systems and close bundle, has the advantage of laser output power height, good beam quality.Be suitable for doing high power laser, be applied to fields such as military affairs, industry.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the floor map that stereo optical path of the present invention distributes;
Fig. 2 is high line on road amplification system under the present invention, the amplification system of setting out on a journey, the following faceted pebble completely reflecting mirror base, goes up the light path distribution schematic diagram in the plane, high line place on the faceted pebble completely reflecting mirror base;
Fig. 3 is the light path distribution schematic diagram in the plane, high line place on high line, the right faceted pebble completely reflecting mirror base on the present invention left side road amplification system, right wing amplification system, the left faceted pebble completely reflecting mirror base;
Fig. 4 is the light path distribution schematic diagram that each road amplification system of the present invention is propped up plane, high line mid point place on each faceted pebble completely reflecting mirror base of fully-reflected plane mirror center and reflecting prism;
Fig. 5 is the incoherent sharp combiner near field of light field patterns of the present invention's four bundles;
Fig. 6 is the incoherent sharp combiner of the present invention's four bundles far field optical field distribution figure.
Embodiment
Embodiment 1: shown in Fig. 1, Fig. 2,3, a kind of four-path incoherent co-beam MOPA high-capacity laser system is made up of main oscillating system 1, PCM power amplifying system 2, reflecting prism 3.Described main oscillating system 1 by oscillator 10, down beam splitter 11, towards left beam splitter 12, beam splitter 13, main fully-reflected plane mirror 14 are formed up, down beam splitter 11, towards left beam splitter 12, beam splitter 13, the main fully-reflected plane mirror 14 primary optical axis 1-1 that is distributed in oscillator 10 successively goes up and angle at 45 between following, left, last, right-hand inclination and primary optical axis 1-1 respectively successively up; Described PCM power amplifying system 2 is by following road amplification system 2-1, left side road amplification system 2-2, the amplification system of setting out on a journey 2-3, right wing amplification system 2-4 forms, following road amplification system 2-1 is by SBS phase-conjugate mirror 211, single convex lens 221, A amplifier 231, biconvex lens 2212, B amplifier 2312, circulator 241, polarizing beam splitter mirror 251, prop up fully-reflected plane mirror 261 and form SBS phase-conjugate mirror 211, single convex lens 221, A amplifier 231, biconvex lens 2212, B amplifier 2312, circulator 241, polarizing beam splitter mirror 251, propping up fully-reflected plane mirror 261 is distributed on one the optical axis 2-1-1 successively; Left side road amplification system 2-2 is made up of SBS phase-conjugate mirror 212, single convex lens 222, A amplifier 232, biconvex lens 2222, B amplifier 2322, circulator 242, polarizing beam splitter mirror 252, a fully-reflected plane mirror 262, and SBS phase-conjugate mirror 212, single convex lens 222, A amplifier 232, biconvex lens 2222, B amplifier 2322, circulator 242, polarizing beam splitter mirror 252, a fully-reflected plane mirror 262 are distributed on one the optical axis 2-2-2 successively; The amplification system of setting out on a journey 2-3 is made up of SBS phase-conjugate mirror 213, single convex lens 223, A amplifier 233, biconvex lens 2232, B amplifier 2332, circulator 243, polarizing beam splitter mirror 253, a fully-reflected plane mirror 263, and SBS phase-conjugate mirror 213, single convex lens 223, A amplifier 233, biconvex lens 2232, B amplifier 2332, circulator 243, polarizing beam splitter mirror 253, a fully-reflected plane mirror 263 are distributed on one the optical axis 2-3-3 successively; Right wing amplification system 2-4 is made up of SBS phase-conjugate mirror 214, single convex lens 224, A amplifier 234, biconvex lens 2242, B amplifier 2342, circulator 244, polarizing beam splitter mirror 254, a fully-reflected plane mirror 264, and SBS phase-conjugate mirror 214, single convex lens 224, A amplifier 234, biconvex lens 2242, B amplifier 2342, circulator 244, polarizing beam splitter mirror 254, a fully-reflected plane mirror 264 are distributed on one the optical axis 2-4-4 successively; Optical axis 2-1-1, the 2-2-2 of each road amplification system 2-1,2-2,2-3,2-4,2-3-3,2-4-4 be parallel to each other and with the primary optical axis 1-1 in the main oscillating system be central shaft be symmetrically distributed successively four-prism shape following, left, on, right seamed edge position, down, a left side, upward, each fully-reflected plane mirror 261,262,263,264 and its place of right wing amplification system 2-1,2-2,2-3,2-4 prop up optical axis angle at 45; Described reflecting prism 3 is by following, a left side, on, right faceted pebble completely reflecting mirror 31,32,33,34 form, down, a left side, on, right faceted pebble completely reflecting mirror 31,32,33,34 isosceles triangle base surrounds the square bottom surface 30 of reflecting prism 3, down, a left side, on, right faceted pebble completely reflecting mirror 31,32,33,34 successively respectively towards following, a left side, on, square bottom surface 30 angles at 45 of right-hand inclination and reflecting prism 3, down, a left side, on, right each faceted pebble completely reflecting mirror 31,32,33, the mid point 3A of high line on 34 the isosceles triangle base, 3B, 3C, 3D and following, a left side, on, right wing amplification system 2-1,2-2,2-3, the fully-reflected plane mirror 261 of 2-4,262,263,264 center 2a, 2b, 2c, the 2d coplane, at the light path distribution schematic diagram on this plane as shown in Figure 4, down, a left side, on, a fully-reflected plane mirror 261 of right wing amplification system, 262,263,264 center 2a, 2b, 2c, plane, 2d place is with following, a left side, on, right wing amplification system 2-1,2-2,2-3, each of 2-4 optical axis 2-1-1,2-2-2,2-3-3,2-4-4 is vertical; The polarizing beam splitter mirror 251 relative and direction quadratures of the beam splitter down 11 of main oscillating system 1 and following road amplification system 2-1, the polarizing beam splitter mirror 253 relative and direction quadratures of the beam splitter up 13 of main oscillating system 1 and the amplification system 2-3 that sets out on a journey, main oscillating system 1 towards the polarizing beam splitter mirror 252 relative and direction quadratures of left beam splitter 12 with left road amplification system 2-2, the polarizing beam splitter mirror 254 relative and direction quadratures of the main fully-reflected plane mirror 14 of main oscillating system 1 and right wing amplification system 2-4; Polarizing beam splitter mirror 251,252,253,254 among following, left, last, right wing amplification system 2-1,2-2,2-3, the 2-4 props up optical axis angle at 45 and parallel with the fully-reflected plane mirror 261,262,263,264 in the optical axis of place with each place respectively; Following, left, on, each fully-reflected plane mirror 261,262,263,264 among the right wing amplification system 2-1,2-2,2-3,2-4 successively respectively with pairing down, a left side, on, right faceted pebble completely reflecting mirror 31,32,33,34 is relative and parallel.
Embodiment 2: as embodiment 1 described four-path incoherent co-beam MOPA high-capacity laser system, high line on the optical axis 2-3-3 of optical axis 2-1-1, the amplification system of the setting out on a journey 2-3 of primary optical axis 1-1 in the main oscillating system 1 and following road amplification system 2-1, following faceted pebble completely reflecting mirror 31 bases of reflecting prism 3, the high line on last faceted pebble completely reflecting mirror 33 bases are in same plane, at the light path distribution schematic diagram on this plane as shown in Figure 2; High line on the optical axis 2-4-4 of optical axis 2-2-2, the right wing amplification system 2-4 of primary optical axis 1-1 in the main oscillating system 1 and left road amplification system 2-2, left faceted pebble completely reflecting mirror 32 bases of reflecting prism 3, the high line on right faceted pebble completely reflecting mirror 34 bases are in same plane, at the light path distribution schematic diagram on this plane as shown in Figure 3.
The above-mentioned said oscillator 10 of the present invention, down beam splitter 11, towards left beam splitter 12, building blocks such as beam splitter 13, main fully-reflected plane mirror 14, SBS phase-conjugate mirror, convex lens, A amplifier, B amplifier, circulator, polarizing beam splitter mirror belong to prior art up.For the heat load, thermal lensing effect and the heat that reduce laser medium to fevering sodium effect, raise the efficiency, master oscillator 10 can adopt diode pumping with each amplifier.
Operation principle of the present invention is: the high-quality laser beam that oscillator 10 sends is respectively by down, towards a left side, beam splitter 11 up, 12,13, main fully-reflected plane mirror 14 is divided into the four part laser beams that intensity equates, incide down respectively, a left side, on, right wing amplification system 2-1,2-2,2-3, each polarizing beam splitter mirror 251 of 2-4,252,253, on 254, through each polarizing beam splitter mirror 251,252,253, vertical and the plane of incidence of the direction of vibration of the polarised light of 254 reflections, through each SBS phase-conjugate mirror 211,212,213,214 wave distortions compensation, each A amplifier 231,232,233,234, B amplifier 2312,2322,2332, after 2342 round trips are amplified, pass through each circulator 241 again, 242,243,244 make the polarization direction of four bundle laser angled before closing bundle respectively, in order to avoid each road light beam interferes with each other in closing bundle superposed process, again respectively by each fully-reflected plane mirror 261,262,263,264 reflex to accordingly down, a left side, on, right faceted pebble completely reflecting mirror 31,32,33, export high light beam quality respectively through reflection on 34, the laser of high luminous power, this four bundles laser propagation direction is identical, at a distance of nearer, overlapping behind the propagation certain distance is a light beams, thereby obtains the high light beam quality, high-power laser output.
The present invention can obtain the incoherent laser superposition of four bundles by four tunnel amplification system 2-1,2-2,2-3,2-4 and close bundle, has the advantage of laser output power height, good beam quality.
The present invention is in order to analyze the beam quality of the incoherent laser beam of four bundles, numerical simulation the near field of synthetic light beam and the optical field distribution in far field.The laser of each road amplification system output Gaussian beam, the optical field distribution of closing bundle back laser near-field as shown in Figure 5, as can be seen from Figure 5 four bundle laser faculas by reflecting prism reflection back outgoing are symmetrical distribution, facular area is divided obviously.After one section larger distance of transmission, laser light field distributes as shown in Figure 6, and as can be seen from Figure 6 four bundle laser have synthesized beam of laser in the far field, and hot spot presents nearly gaussian beam profile.The incoherent bundle that closes of this explanation multiple beam can obtain high light beam quality, the output of high-power laser.
The present invention is that example is introduced with above-mentioned four-path incoherent Co-beam MOPA laser system.Also can increase the way of amplification system, reflecting prism 3 can be a multiaspect, and one road laser can be reflected in each surface, can realize that like this multiple lasers such as 3 tunnel, 4 tunnel, 5 tunnel, 6 tunnel, 7 tunnel, 8 tunnel close bundle, can obtain the above output of average power KW level.
Claims (2)
1. four-path incoherent co-beam MOPA high-capacity laser system, it is made up of main oscillating system, PCM power amplifying system, reflecting prism, it is characterized in that: main oscillating system by oscillator, down beam splitter, towards left beam splitter, beam splitter, main fully-reflected plane mirror are formed up, down beam splitter, towards left beam splitter, beam splitter, main fully-reflected plane mirror are distributed on the primary optical axis of oscillator and angle at 45 between following, left, last, right-hand inclination and primary optical axis respectively successively successively up; The PCM power amplifying system is by following, a left side, on, the right wing amplification system is formed, each road amplification system is by the SBS phase-conjugate mirror, single convex lens, the A amplifier, biconvex lens, the B amplifier, circulator, polarizing beam splitter mirror, propping up fully-reflected plane mirror forms, the SBS phase-conjugate mirror of each road amplification system, single convex lens, the A amplifier, biconvex lens, the B amplifier, circulator, polarizing beam splitter mirror, propping up fully-reflected plane mirror is distributed on one optical axis successively, the optical axis of each road amplification system is parallel to each other and is be symmetrically distributed successively following four-prism shape of central shaft with the primary optical axis in the main oscillating system, a left side, on, right seamed edge position, down, a left side, on, optical axis angle at 45 is propped up at a fully-reflected plane mirror and its place of right wing amplification system; Described reflecting prism is by following, a left side, on, right faceted pebble completely reflecting mirror is formed, down, a left side, on, each isosceles triangle base of right faceted pebble completely reflecting mirror surrounds the square bottom surface of reflecting prism, down, a left side, on, right faceted pebble completely reflecting mirror respectively with the square bottom surface of reflecting prism angle at 45, down, a left side, on, the mid point of high line and following on the right faceted pebble completely reflecting mirror isosceles triangle base, a left side, on, the center coplane of each fully-reflected plane mirror of right wing amplification system, down, a left side, on, the plane, place, center of each fully-reflected plane mirror of right wing amplification system is vertical with an optical axis of each road amplification system, down, a left side, on, each polarizing beam splitter mirror in the right wing amplification system is parallel with each fully-reflected plane mirror in the optical axis of place respectively; Main oscillating system down, towards a left side, up beam splitter, main fully-reflected plane mirror successively respectively with down, a left side, go up, the relative and direction quadrature of corresponding polarizing beam splitter mirror of right wing amplification system, down, a left side, go up, each fully-reflected plane mirror of right wing amplification system successively respectively with reflecting prism corresponding down, left, upward, right faceted pebble completely reflecting mirror is relative and parallel.
2. four-path incoherent co-beam MOPA high-capacity laser system according to claim 1 is characterized in that: an optical axis of the primary optical axis in the main oscillating system and following road amplification system, the amplification system of setting out on a journey, down the high line on the faceted pebble completely reflecting mirror base, go up high line on the faceted pebble completely reflecting mirror base in same plane; High line on an optical axis of primary optical axis in the main oscillating system and left road amplification system, right wing amplification system, left faceted pebble completely reflecting mirror, the right faceted pebble completely reflecting mirror base is in same plane.
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| CNA2008101572638A CN101364700A (en) | 2008-09-27 | 2008-09-27 | Four-path incoherent co-beam MOPA high-capacity laser system |
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| CNA2008101572638A CN101364700A (en) | 2008-09-27 | 2008-09-27 | Four-path incoherent co-beam MOPA high-capacity laser system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801106A (en) * | 2012-07-30 | 2012-11-28 | 中国人民解放军国防科学技术大学 | Multi-chain lath laser coherence control common-aperture polarization synthesis method |
| CN106773072A (en) * | 2016-12-13 | 2017-05-31 | 中国科学院光电研究院 | The detection means of laser shaping system and laser shaping system |
| CN113346337A (en) * | 2021-05-31 | 2021-09-03 | 中国航空制造技术研究院 | High peak power pulse laser coherent synthesis device |
| CN117381212A (en) * | 2023-11-23 | 2024-01-12 | 江阴创可激光技术有限公司 | Laser processing device for emitting light of double lasers |
| CN117381212B (en) * | 2023-11-23 | 2024-05-10 | 江阴创可激光技术有限公司 | Laser processing device for emitting light of double lasers |
-
2008
- 2008-09-27 CN CNA2008101572638A patent/CN101364700A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801106A (en) * | 2012-07-30 | 2012-11-28 | 中国人民解放军国防科学技术大学 | Multi-chain lath laser coherence control common-aperture polarization synthesis method |
| CN102801106B (en) * | 2012-07-30 | 2014-05-28 | 中国人民解放军国防科学技术大学 | Multi-chain lath laser coherence control common-aperture polarization synthesis method |
| CN106773072A (en) * | 2016-12-13 | 2017-05-31 | 中国科学院光电研究院 | The detection means of laser shaping system and laser shaping system |
| CN113346337A (en) * | 2021-05-31 | 2021-09-03 | 中国航空制造技术研究院 | High peak power pulse laser coherent synthesis device |
| CN117381212A (en) * | 2023-11-23 | 2024-01-12 | 江阴创可激光技术有限公司 | Laser processing device for emitting light of double lasers |
| CN117381212B (en) * | 2023-11-23 | 2024-05-10 | 江阴创可激光技术有限公司 | Laser processing device for emitting light of double lasers |
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