CN217469094U - Tunable dual wavelength output slab laser - Google Patents
Tunable dual wavelength output slab laser Download PDFInfo
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- CN217469094U CN217469094U CN202221786740.9U CN202221786740U CN217469094U CN 217469094 U CN217469094 U CN 217469094U CN 202221786740 U CN202221786740 U CN 202221786740U CN 217469094 U CN217469094 U CN 217469094U
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Abstract
The utility model relates to the field of high-power solid lasers, in particular to a tunable dual-wavelength output slab laser, which comprises a seed optical isolation and shaping module, a slab four-way amplification module and a tunable module, wherein the seed optical isolation and shaping module, the slab four-way amplification module and the tunable module are matched with a transmission light path; the seed light isolation and shaping module generates seed light, the seed light is shaped into a rectangular light spot matched with the batten four-way amplification module, the shaped seed light enters the batten four-way amplification module to be amplified, and the amplified seed light enters the adjustable resonance module to be subjected to wavelength adjustment. The utility model discloses a hundred picoseconds of high beam quality list longitudinal mode laser output that repetition frequency, energy and wavelength are all tunable realizes enlargiing the four-way of seed light through lath four-way enlargement module, has effectively improved the power and the beam quality of seed light to the influence of thermal lens effect to the laser instrument has been reduced.
Description
Technical Field
The utility model relates to a high power solid laser field especially relates to tunable dual wavelength output lath laser.
Background
The laser pulse with high pulse energy and short pulse width has wide application prospect in the fields of laser processing, laser ignition, laser radar and the like. In the laser radar field, a sub-nanosecond laser source is used to achieve centimeter-level distance accuracy. In addition, in laser radar applications, high pulse energy is beneficial for improving echo intensity and long-range ranging. The short cavity q-switching technique is a promising short-period laser generation technique. However, the small mode volume in a short length laser cavity limits the increase in pulse energy. Master Oscillator Power Amplifier (MOPA) technology is used to amplify the output energy of a short pulse width laser pulse.
For MOPA technology, the thermal lens effect of the gain module is unavoidable, but the thermal lens effect may deteriorate laser performance and even cause damage to optical elements. The seed light employs multiple stages of amplification, spreading the thermal load across the amplification stages, and adding adjustment elements between the amplification stages to compensate for thermal lens effects. In addition, in order to obtain a high gain coefficient, the pump energy of the gain module is usually very high, and an Amplified Spontaneous Emission (ASE) effect is easily generated. The slab laser has a larger heat dissipation area and a smaller thermal effect, so that the slab laser becomes one of the most effective ways to obtain high-power and high-beam-quality laser output. And the slab laser can realize multi-pass amplification, thereby further improving the gain coefficient.
SUMMERY OF THE UTILITY MODEL
To the great technical problem of current laser instrument heating lens effect influence, the utility model provides a tunable dual wavelength output lath laser instrument realizes high repetition frequency and high energy lath laser instrument four passes through the four passes enlarged module and enlargies simple and easy structure, realizes the tunable of energy and wavelength through design frequency doubling system and energy governing system.
In order to achieve the above purpose, the technical solution of the present invention is realized as follows: the tunable dual-wavelength output slab laser is characterized by comprising a seed optical isolation and shaping module, a slab four-way amplification module and a tunable module, wherein the seed optical isolation and shaping module, the slab four-way amplification module and the tunable module are matched in transmission light path; the seed light isolation and shaping module generates seed light and shapes the seed light into a rectangular light spot matched with the batten four-way amplification module, the shaped seed light enters the batten four-way amplification module for amplification, and the amplified seed light enters the adjustable resonance module for wavelength adjustment.
Seed optical isolation and plastic module is including the single mode laser instrument of indulging, first plastic mirror, second plastic mirror, first speculum and the second mirror that sets gradually, and the central point setting of the single mode laser instrument of indulging, first plastic mirror, second plastic mirror and first speculum is on same water flat line, and first speculum is relative with second mirror central point, and seed light is exported by the second mirror and gets into the lath four ways and enlarge the module.
A first isolator is arranged between the single longitudinal mode laser and the first shaping mirror, and the single longitudinal mode laser, the first isolator and the first shaping mirror are arranged on the same horizontal line.
The first shaping mirror is a spherical plano-concave cylindrical lens, the second shaping mirror is a spherical plano-convex cylindrical lens, and the distance between the first shaping mirror and the second shaping mirror is 139-141 mm.
The slab four-way amplification module comprises a first spatial filter, a first polaroid, a slab amplifier, a first reflection module and a second reflection module, the central points of the first spatial filter, the first polaroid and the slab amplifier are arranged on the same horizontal line, the first reflection module and the second reflection module are matched with a transmission light path of the slab amplifier, and seed light enters the tunable module after being output by the first polaroid.
The first reflecting module comprises a third reflecting mirror and a fourth reflecting mirror, and the third reflecting mirror and the fourth reflecting mirror correspond to the central point of the fourth reflecting mirror; the second reflecting module comprises a fifth reflecting mirror, a sixth reflecting mirror, a second spatial filter, a quarter glass sheet and a zero degree reflecting mirror, the central points of the slab amplifier, the fifth reflecting mirror and the sixth reflecting mirror correspond to each other, and the central points of the sixth reflecting mirror, the second spatial filter, the quarter glass sheet and the zero degree reflecting mirror are arranged on the same horizontal line.
The second isolator is arranged between the first space filter and the first polaroid, the centers of the first space filter, the second isolator and the first polaroid are arranged on the same horizontal line, the first space filter comprises a plano-convex lens I and a plano-convex lens II, and the distance between the plano-convex lens I and the plano-convex lens II is 1120 mm.
The slab amplifier is a double-end pump, the input surface of the double-end pump is plated with a 1064 nm high-transmittance film, and the side surface of the double-end pump is plated with SiO 2 Film on SiO 2 The film is plated with a 808 nm high-permeability film.
The tunable module comprises a second polaroid, an adjustable half glass slide, a third polaroid, a first collimating mirror, a second collimating mirror and a frequency doubling system, wherein the central points of the second polaroid, the adjustable half glass slide, the third polaroid, the first collimating mirror, the second collimating mirror and the frequency doubling system are arranged on the same horizontal line.
The frequency doubling system comprises a movable bottom plate, a frequency doubling crystal and a color separating mirror, wherein the frequency doubling crystal and the color separating mirror are arranged on the movable bottom plate, and the centers of the second collimating mirror, the frequency doubling crystal and the color separating mirror are arranged on the same horizontal line.
Adopt above-mentioned structure the utility model discloses, realize being even rectangle facula with the circular facula plastic of seed light through seed light isolation and plastic module to satisfy the damage threshold value of four-way amplification lath incident surface, compare with traditional beam shaping system, the utility model discloses a structure is simple relatively, and the low price adopts the utility model provides a seed light isolation can realize kilohertz, hundred picoseconds joule level's high beam quality's rectangle facula output with plastic module. And simultaneously, the utility model discloses a lath round trip is enlarged the module and is handled seed light process, realizes enlarging the round trip of seed light, has effectively improved the power and the light beam quality of seed light to the influence of thermal lens effect to the laser instrument has been reduced. Furthermore, the utility model discloses a first space filter and second space filter mating reaction ensure high beam quality output, realize switching the doubling of frequency of output laser through frequency doubling system, effectively widen the utility model discloses an use the scene.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1 is a seed optical isolation and shaping module, 2 is a slab four-way amplification module, 3 is a tunable module, 1-1 is a single longitudinal mode laser, 1-2 is a first isolator, 1-3 is a first shaping mirror, 1-4 is a second shaping mirror, 1-5 is a first reflector, 1-6 is a second reflector, 2-1 is a first spatial filter, 2-2 is a second isolator, 2-3 is a first polarizer, 2-4 is a slab amplifier, 2-5 is a third reflector, 2-6 is a fourth reflector, 2-7 is a fifth reflector, 2-8 is a sixth reflector, 2-9 is a second spatial filter, 2-10 is a quarter glass, 2-11 is a zero degree reflector, 3-1 is a second polarizer, 3-2 is an adjustable half glass slide, 3-3 is a third polaroid, 3-4 is a first collimating mirror, 3-5 is a second collimating mirror, 3-6 is a movable bottom plate, 3-7 is a frequency doubling crystal, and 3-8 is a color separating mirror.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
As shown in fig. 1, the tunable dual-wavelength output slab laser includes a seed optical isolation and shaping module 1, a slab four-way amplification module 2, and a tunable module 3, where the seed optical isolation and shaping module 1, the slab four-way amplification module 2, and the tunable module 3 are matched in transmission optical path.
Wherein, the seed optical isolation and shaping module 1 comprises a single longitudinal mode laser 1-1, a first shaping mirror 1-3, a second shaping mirror 1-4, a first reflector 1-5 and a second reflector 1-6 which are arranged in sequence, a first isolator 1-2 is arranged between the single longitudinal mode laser 1-1 and the first shaping mirror 1-3, the central points of the single longitudinal mode laser 1-1, the first isolator 1-2, the first shaping mirror 1-3, the second shaping mirror 1-4 and the first reflector 1-5 are arranged on the same horizontal line, the central points of the first reflector 1-5 and the second reflector 1-6 are opposite, the transmission height of the seed light can be controlled by the first reflector 1-5 and the second reflector 1-6, and the seed light is output by the second reflector 1-6 and enters the batten four-way amplification module 2. The single longitudinal mode laser 1-1 mainly has the function of generating circular single longitudinal mode S-shaped linearly polarized light serving as seed light, and the repetition frequency of the seed light is tunable within the range of 200 Hz to 1 kHz. The seed light generated by the single longitudinal mode laser 1-1 passes through a first isolator 1-2, a first shaping mirror 1-3 and a second shaping mirror 1-4 in sequence. The primary function of the first isolator 1-2 is to prevent the mirror-reflected beam of the device and the return light of the slab four-way amplification module 2 from damaging the single longitudinal mode laser 1-1. The first shaping mirror 1-3 is a spherical plano-concave cylindrical lens, the second shaping mirror 1-4 is a spherical plano-convex cylindrical lens, and the distance between the first shaping mirror 1-3 and the second shaping mirror 1-4 is 139 and 141 mm. First plastic mirror 1-3 and second plastic mirror 1-4 combined action are the even rectangle facula of 2 mm 18 mm with the circular facula plastic of seed light to match the incident surface of four-way amplification lath 2, satisfy the damage threshold value of four-way amplification lath 2 terminal surfaces, compare with traditional beam shaping system, the utility model discloses a structure is simple relatively, the low price, the utility model discloses a single vertical mode laser 1-1, first isolator 1-2, first plastic mirror 1-3 and second plastic mirror 1-4 handle the rectangle facula output that can realize the high beam quality of hertz, hundred picoseconds joule level. The shaped seed light is reflected by the second mirror 1-6 into the slab four-way magnification module 2.
The slab four-way amplification module 2 comprises a first spatial filter 2-1, a first polaroid 2-3, a slab amplifier 2-4, a first reflection module and a second reflection module, a second isolator 2-2 is arranged between the first spatial filter 2-1 and the first polaroid 2-3, the central points of the first spatial filter 2-1, the second isolator 2-2, the first polaroid 2-3 and the slab amplifier 2-4 are arranged on the same horizontal line, the first reflection module and the second reflection module are matched with a transmission light path of the slab amplifier 2-4, and seed light enters the tunable module 3 after being output by the first polaroid 2-3. The first spatial filter 2-1 comprises a plano-convex lens I and a plano-convex lens II, the distance between the plano-convex lens I and the plano-convex lens II is 1120 mm, and the first spatial filter 2-1 is mainly used for image transmission and filtering, so that distortion-free transmission of seed light is guaranteed. The shaped seed light is output by the first spatial filter 2-1 and then input into the second isolator 2-2, the second isolator 2-2 mainly functions to prevent the return light from entering the single longitudinal mode laser to damage the laser, and then the shaped seed light enters the slab amplifier 2-4 through the first polarizer 2-3 to be amplified in a single pass. The slab amplifier 2-4 is a double-end pump, the input surface of the double-end pump is plated with a 1064 nm high-transmittance film, and the side surface is plated with a 808 nm high-transmittance film and SiO 2 The film is used for preventing evanescent wave loss, and the main function of the 808 nm high-transmittance film is to facilitate the introduction of the pump light into the slab amplifier. The first reflection module comprises a third reflector 2-5 and a fourth reflector 2-6, the third reflector 2-5 and the fourth reflector 2-6 correspond to the central point of the fourth reflector 2-6, and the light path is on the boardThe strip amplifiers 2-4, the third mirrors 2-5 and the fourth mirrors 2-6 are transmitted along triangular paths; the second reflection module comprises a fifth reflection mirror 2-7, a sixth reflection mirror 2-8, a second spatial filter 2-9, a quarter glass slide 2-10 and a zero degree reflection mirror 2-11, the central points of the slab amplifier 2-4, the fifth reflection mirror 2-7 and the sixth reflection mirror 2-8 correspond to each other, and the central points of the sixth reflection mirror 2-8, the second spatial filter 2-9, the quarter glass slide 2-10 and the zero degree reflection mirror 2-11 are arranged on the same horizontal line. The amplified seed light is reflected by the third reflector 2-5 and the fourth reflector 2-6 and enters the slab amplifier 2-4 again for two-pass amplification. The seed light after the second-pass amplification enters a second spatial filter 2-9 for spatial filtering and image transmission after being reflected by a fifth reflector 2-7 and a sixth reflector 2-8, so that the light spots of the seed light are not distorted, and the beam quality of the seed light is optimized. The optimized seed light is output by the second spatial filter 2-9, reflected by the zero degree reflector 2-11 after passing through the quarter glass 2-10, and the quarter wave plate 2-10 is used for changing the polarization state of the laser, so that the laser can be reflected and output through the polaroid 2-3 after being amplified in three-way and four-way. The reflected seed light sequentially passes through a quarter glass 2-10, a second spatial filter 2-9, a sixth reflector 2-8 and a fifth reflector 2-7 and then enters a slab amplifier 2-4 again for three-pass amplification. Through first space filter and second space filter mating reaction, the utility model discloses a high beam quality output. The seed light amplified in the third range is output by the slab amplifier 2-4, reflected by the fourth reflector 2-6 and the third reflector 2-5, and then enters the slab amplifier 2-4 again for amplification in the fourth range, and the seed light amplified in the fourth range is reflected by the first polarizer 2-3 and enters the tunable module 3. Through lath round trip amplification module 2, the utility model discloses a to the round trip amplification of the seed light through the plastic, effectively improved the power and the light beam quality of seed light, lath amplifier 2-4 has effectively reduced the influence of thermal lens effect to the laser instrument simultaneously.
The tunable module 3 comprises a second polaroid 3-1, an adjustable half glass 3-2, a third polaroid 3-3, a first collimating mirror 3-4, a second collimating mirror 3-5 and a frequency doubling system, wherein the central points of the second polaroid 3-1, the adjustable half glass 3-2, the third polaroid 3-3, the first collimating mirror 3-4, the second collimating mirror 3-5 and the frequency doubling system are arranged on the same horizontal line. The frequency doubling system comprises a movable bottom plate 3-6, a frequency doubling crystal 3-7 and a color separation mirror 3-8, wherein the frequency doubling crystal 3-7 and the color separation mirror 3-8 are arranged on the movable bottom plate 3-6, and the centers of the frequency doubling crystal 3-7 and the color separation mirror 3-8 are arranged on the same horizontal line. The seed light after the four-way amplification sequentially comprises a second polaroid 3-1, an adjustable half wave plate 3-2 and a third polaroid 3-3, wherein the adjustable half wave plate 3-2 is mainly used for adjusting the polarization angle of the light beam, and the energy of the seed light after the four-way amplification can be adjusted by matching the adjustable half wave plate 3-2 with the third polaroid 3-3. The seed light after energy adjustment sequentially enters the first collimating mirror 3-4 and the second collimating mirror 3-5, and the first collimating mirror 3-4 and the second collimating mirror 3-5 mainly act to output laser in a collimating manner so as to realize long-distance transmission of the laser. The collimated seed light enters a frequency doubling system and sequentially passes through a frequency doubling crystal 3-7 and a color separation mirror 3-8, the frequency doubling crystal 3-7 is mainly used for doubling the frequency of the seed light with the wavelength of 1064 nm into seed light with the wavelength of 532nm, and the color separation mirror 3-8 is mainly used for reflecting laser with the wavelength of 1064 nm. In the using process, if the laser needs to output high-power laser with the wavelength of 532nm, the movable bottom plate 3-6 is used for moving the frequency doubling system into the optical path, and if the laser needs to output laser with the wavelength of 1064 nm, the movable bottom plate 3-6 is used for moving the frequency doubling system out of the optical path. The utility model discloses a frequency doubling system makes the output laser of laser instrument can be freely switched between for the 1064 nm laser with the wavelength at the wavelength 532nm laser, effectively widens the utility model discloses an use the scene.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The tunable dual-wavelength output slab laser is characterized by comprising a seed optical isolation and shaping module (1), a slab four-way amplification module (2) and a tunable module (3), wherein transmission light paths of the seed optical isolation and shaping module (1), the slab four-way amplification module (2) and the tunable module (3) are matched;
the seed light isolation and shaping module (1) generates seed light, the seed light is shaped into a rectangular light spot matched with the batten four-way amplification module (2), the shaped seed light enters the batten four-way amplification module (2) for amplification, and the amplified seed light enters the tunable module (3) for wavelength adjustment.
2. The tunable dual wavelength output slab laser as claimed in claim 1, wherein the seed optical isolation and shaping module (1) comprises a single longitudinal mode laser (1-1), a first shaping mirror (1-3), a second shaping mirror (1-4), a first reflector (1-5) and a second reflector (1-6) which are arranged in sequence, the central points of the single longitudinal mode laser (1-1), the first shaping mirror (1-3), the second shaping mirror (1-4) and the first reflector (1-5) are arranged on the same horizontal line, the first reflector (1-5) is opposite to the central point of the second reflector (1-6), and the seed light is output by the second reflector (1-6) to enter the slab four-way amplification module (2).
3. The tunable dual wavelength output slab laser according to claim 2, characterized in that a first isolator (1-2) is provided between the single longitudinal mode laser (1-1) and the first shaping mirror (1-3), and the single longitudinal mode laser (1-1), the first isolator (1-2) and the first shaping mirror (1-3) are arranged on the same horizontal line.
4. A tunable dual wavelength output slab laser according to claim 2 or 3, characterized in that the first shaping mirror (1-3) is a spherical plano-concave cylindrical lens, the second shaping mirror (1-4) is a spherical plano-convex cylindrical lens, and the distance between the first shaping mirror (1-3) and the second shaping mirror (1-4) is 139-141 mm.
5. The tunable dual-wavelength output slab laser according to claim 4, wherein the slab four-way amplification module (2) comprises a first spatial filter (2-1), a first polarizer (2-3), a slab amplifier (2-4), a first reflection module and a second reflection module, the central points of the first spatial filter (2-1), the first polarizer (2-3) and the slab amplifier (2-4) are arranged on the same horizontal line, the first reflection module and the second reflection module are matched with the transmission optical path of the slab amplifier (2-4), and the seed light is output by the first polarizer (2-3) and enters the tunable module (3).
6. The tunable dual wavelength output slab laser according to claim 5, wherein the first reflecting module comprises a third mirror (2-5) and a fourth mirror (2-6), the third mirror (2-5) and the fourth mirror (2-6) corresponding to a fourth mirror (2-6) center point;
the second reflection module comprises a fifth reflector (2-7), a sixth reflector (2-8), a second spatial filter (2-9), a quarter glass (2-10) and a zero reflector (2-11), the central points of the slab amplifier (2-4), the fifth reflector (2-7) and the sixth reflector (2-8) are corresponding, and the central points of the sixth reflector (2-8), the second spatial filter (2-9), the quarter glass (2-10) and the zero reflector (2-11) are arranged on the same horizontal line.
7. A tunable dual wavelength output slab laser according to claim 5 or 6, characterized in that a second isolator (2-2) is provided between the first spatial filter (2-1) and the first polarizer (2-3), the centers of the first spatial filter (2-1), the second isolator (2-2) and the first polarizer (2-3) are arranged on the same horizontal line, the first spatial filter (2-1) comprises a plano-convex lens I and a plano-convex lens II, and the distance between the plano-convex lens I and the plano-convex lens II is 1120 mm.
8. The tunable dual wavelength output slab laser of claim 7 wherein the slab amplifier(2-4) double-end pumping, wherein the input surface of the double-end pumping is plated with a 1064 nm high-permeability film, and the side surface of the double-end pumping is plated with SiO 2 Film on SiO 2 The film is plated with a layer of 808 nm high-permeability film.
9. The tunable dual wavelength output slab laser according to any one of claims 1 or 8, wherein the tunable module (3) comprises a second polarizer (3-1), a tunable half glass (3-2), a third polarizer (3-3), a first collimating mirror (3-4), a second collimating mirror (3-5) and a frequency doubling system, and the central points of the second polarizer (3-1), the tunable half glass (3-2), the third polarizer (3-3), the first collimating mirror (3-4), the second collimating mirror (3-5) and the frequency doubling system are arranged on the same horizontal line.
10. The tunable dual wavelength output slab laser according to claim 9, wherein the frequency doubling system comprises a movable base (3-6), a frequency doubling crystal (3-7) and a color separation mirror (3-8), the frequency doubling crystal (3-7) and the color separation mirror (3-8) being arranged on the movable base (3-6), and centers of the second collimating mirror (3-5), the frequency doubling crystal (3-7) and the color separation mirror (3-8) being arranged on the same horizontal line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221786740.9U CN217469094U (en) | 2022-07-12 | 2022-07-12 | Tunable dual wavelength output slab laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221786740.9U CN217469094U (en) | 2022-07-12 | 2022-07-12 | Tunable dual wavelength output slab laser |
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| CN217469094U true CN217469094U (en) | 2022-09-20 |
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