CN112038874A - Self-pumping SBS pulse compression system of twin-pool - Google Patents
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Abstract
The invention discloses a double-pool self-pumping SBS pulse compression system, which comprises: the tunable laser provides pump light, the pump light passes through the first quarter-wave plate after being analyzed and polarized by the polarizer and is converted into circularly polarized light, and the circularly polarized light is focused into the first medium pool as first pump light after passing through the focusing lens; the compressed pulse after coupling reaction in the first medium pool is output from the front window mirror and passes through the first quarter-wave plate again, the compressed pulse is converted into S-shaped linearly polarized light by circularly polarized light, is reflected by the polaroid, is converted into circularly polarized light again by the reflector and the second quarter-wave plate, and then enters the second medium pool through the beam shrinking structure to serve as second pumping light; fresnel reflection of the refractive index difference between the rear window mirror of the second medium pool and the medium material provides feedback light transmitted in the back direction, a component containing Brillouin frequency shift serves as second pump light transmitted in the front direction, the second pump light is amplified and compressed and then output from the front window mirror of the second medium pool, and the second pump light is converted into P-type linear polarized light through the second quarter wave plate and then output through the reflecting mirror and the polarizing plate.
Description
Technical Field
The invention relates to the field of nonlinear optics, in particular to a dual-cell self-pumped SBS (styrene-butadiene-styrene) pulse compression system.
Background
Hundred picosecond laser pulses have important applications in Doppler laser wind measuring radar, space debris laser radar detection, laser Inertial Confinement Fusion (ICF), laser plasma generation, extreme ultraviolet lithography, various nonlinear optics and laser fine spectrum researches, activation of a photoconductive switch, Thomson scattering laser radar diagnosis, stray loss of long optical fibers, strong radiation proton sources, electron acceleration, laser medical treatment and other aspects.
Based on its wide application, compressing nanosecond-level laser pulses to hundred picosecond-level laser pulses has important and practical significance. The Stimulated Brillouin Scattering (SBS) pulse compression technology is an effective pulse width compression technology for compressing nanosecond long pulses to picosecond short pulses, is simple in structure and low in manufacturing cost, and is a popular technical means and research direction in recent years.
Disclosure of Invention
The invention provides a double-pool self-pumping SBS pulse compression system, and provides a new technical means for realizing the conversion of pulse from nanosecond magnitude to picosecond magnitude and simultaneously improving the stability of the time for generating compressed pulse, which is described in detail as follows:
a dual-cell, self-pumped SBS pulse compression system, the system comprising:
the tunable laser provides pump light, the pump light passes through the first quarter-wave plate after being analyzed and polarized by the polarizer and is converted into circularly polarized light, and the circularly polarized light is focused into the first medium pool as first pump light after passing through the focusing lens;
the compressed pulse after coupling reaction in the first medium pool is output from the front window mirror and passes through the first quarter-wave plate again, the compressed pulse is converted into S-shaped linearly polarized light by circularly polarized light, is reflected by the polaroid, is converted into circularly polarized light again by the reflector and the second quarter-wave plate, and then enters the second medium pool through the beam shrinking structure to serve as second pumping light;
fresnel reflection of the refractive index difference between the rear window mirror of the second medium pool and the medium material provides feedback light transmitted in the back direction, a component containing Brillouin frequency shift serves as second pump light transmitted in the front direction, the second pump light is amplified and compressed and then output from the front window mirror of the second medium pool, and the second pump light is converted into P-type linear polarized light through the second quarter wave plate and then output through the reflecting mirror and the polarizing plate.
Wherein the tunable laser is continuously pulsed, quasi-continuously pulsed, or pulsed in operation.
Furthermore, the included angle between the polaroid and the horizontal direction is a Brewster angle theta, the first medium pool is a focusing medium pool, and the second medium pool is a non-focusing medium pool.
Wherein the beam shrinking structure is a combination of a convex lens and a concave lens.
Further, the rear window mirror of the second medium pool wall is pasted with a high reflection film and used for increasing the reflectivity of the rear window mirror.
Wherein the focal length f of the focusing lens is not more than d + d0+L1，
Wherein, d: the mirror pool spacing; d0: the thickness of a front window mirror of the medium pool; l is1: the length of the focusing medium pool; l is1≥leff，
leff: an effective interaction length; c: the speed of light; n: the brillouin medium refractive index.
Further, the system further comprises: the sampling structure is used for sampling the sample,
the reflected light output by the first medium pool is used as the pumping light of the second medium pool, and the Stokes light is amplified and compressed by the subsequent pumping light, then is output from the front window mirror of the second medium pool, and then is subjected to sampling structure to measure the output pulse waveform and energy.
Wherein the sampling structure comprises: a wedge-shaped plate, an energy meter and a photoelectric detector,
the wedge-shaped plate is arranged between the beam-shrinking structure and the second medium pool and is used for sampling the light pulse of the second pump light,
the waveform of the signal is recorded by an external oscilloscope after the signal is received by the photoelectric detector; measuring the sampled laser pulse energy via the energy meter.
The laser pulse energy measured and sampled by the energy meter is specifically as follows:
the light pulse reflected on the first surface of the wedge-shaped plate enters an energy meter, and a sampling laser energy value E is measured0And when the sampling rate of the wedge-shaped plate is determined to be k, the pumping light energy entering the second medium pool is Ep＝(1-k)·E0。
The technical scheme provided by the invention has the beneficial effects that:
1. the invention firstly provides a double-pool self-pumping SBS pulse compression system optical path structure;
2. similar to conventional SBS reflected light, the pulse width of reflected light from the pumped SBS is also somewhat narrowed relative to the pump pulse width. On the other hand, the self-pumped SBS originates from the feedback of the dielectric pool rear window mirror instead of randomly distributed thermal noise, so that the stability of the time for generating the compression pulse is greatly improved compared with the compression pulse generated by the traditional scheme;
3. in addition, the technology for generating the high-energy hundred picosecond laser pulse has the characteristics of simple structure, convenient operation and the like, and can be expanded to the application aspect of the high-energy pulse compression technology in the future.
Drawings
Fig. 1 is a schematic diagram of a double-cell self-pumping SBS pulse compression structure.
In the drawings, the components represented by the respective reference numerals are listed below:
1: a laser; 2: a polarizing plate;
3: a first quarter wave plate; 4: a focusing lens;
5: a first media pool; 6: a mirror;
7: a second quarter wave plate; 8: a beam shrinking structure;
9: a second medium pool; 10: and (4) sampling structure.
Wherein the content of the first and second substances,
8-1: a convex lens; 8-2: a concave lens;
10-1: a wedge plate; 10-2: a first energy meter;
10-3: a first photodetector; 10-4: a second energy meter;
10-5: a second photodetector.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below.
SBS technology is a very efficient solution for achieving high peak power output of hundreds of picosecond laser pulses. In the early 80 s of the 20 th century, SBS technology was used to obtain high quantum efficiency, high gain phase conjugate light that could repair wavefront aberrations, and thus found great potential for application. Nowadays, the technology has been widely applied to the aspects of imaging distortion correction, laser nuclear fusion, fast and slow light technology, laser pulse compression, laser coherence beam combination and the like. Among them, the SBS compression technology has become one of the most active fields of scientific and technical research and development. The method utilizes the advantages of easy generation and amplification of nanosecond-level long pulse, sufficient energy extraction and the like to obtain high-energy pulse output in a laser amplification link, and then compresses the long pulse to a picosecond level by utilizing SBS pulse compression characteristics at an output end, thereby obtaining high-energy short-pulse high-power laser output.
In a traditional SBS-based one hundred picosecond laser pulse passive generation scheme, the use of a focusing lens easily causes the laser energy near the focal plane to be too large, causing optical breakdown or permanent damage of the nonlinear medium, limiting further increase of the laser energy. In addition, although the SBS pulse compression technology can basically compress pulses to picoseconds, there are many limitations on obtaining ultra-short pulses with high energy of 200ps or less, and the SBS pulse compression technology has disadvantages of being too complicated in apparatus, not high in stability, low in pulse compression rate and energy conversion efficiency, and the like. Therefore, high-energy and more stable hundred picosecond pulse output can be realized by selecting proper laser pumping parameters, experimental device structural parameters and SBS compression medium, and more reliable basis can be provided for the realization of impact ignition.
In order to obtain hundreds of picoseconds compressed pulse output with time stability, the invention provides a novel double-pool self-pumping SBS pulse compression system. Similar to conventional SBS reflected light, the pulse width of reflected light from the pumped SBS is also somewhat narrowed relative to the pump pulse width.
On the other hand, since the self-pumped SBS originates from the feedback of the dielectric pool rear window mirror rather than randomly distributed thermal noise, the time stability of the generated compression pulse is greatly improved compared with that generated by the conventional scheme. In addition, the technology for generating the high-energy hundred picosecond laser pulse has the characteristics of simple structure, convenient operation and the like, and can be expanded to high-energy pulse compression in the future.
Referring to fig. 1, the dual-cell self-pumping SBS pulse compression system includes: the tunable laser 1, a polarizer 2, a first quarter-wave plate 3, a focusing lens 4, a first dielectric pool 5, a mirror 6, a second quarter-wave plate 7, a beam-shrinking structure 8 and a second dielectric pool 9. Wherein, the beam-shrinking structure 8 consists of a convex lens 8-1 and a concave lens 8-2.
The tunable laser 1 is a continuous pulse, quasi-continuous pulse or pulse operation and provides pump light, the pump light is analyzed and polarized through the polarizer 2, then is converted into circularly polarized light through the first quarter-wave plate 3, and is focused into the first mass pool 5 through the focusing lens 4 to be used as first pump light.
Wherein, the included angle between the polaroid 2 and the horizontal direction is a Brewster angle theta. The first medium pool 5 is a focusing medium pool, particularly a Brillouin medium pool in implementation, and the nonlinear medium in the medium pool can be selected from a perfluorinated amine series medium with low absorption, high load and short service life.
The pulse width and waveform modulation means of the tunable laser as the pump light source and the selection criteria of the medium are well known to those skilled in the art, and are not described in detail in the embodiments of the present invention.
Further, the compression pulse after the sufficient coupling reaction in the first brillouin medium pool 5 is output from the front window mirror of the first medium pool 5 and passes through the first quarter-wave plate 3 again, the compression pulse at this time is converted into S-shaped linearly polarized light by circularly polarized light, is reflected by the polarizer 2, is converted into circularly polarized light again by the reflector 6 and the second quarter-wave plate 7, then enters the second medium pool 9 as second pump light after passing through the beam shrinking structure 8, feedback light transmitted in the backward direction is provided by fresnel reflection of the refractive index difference between the rear window mirror of the second medium pool 9 and the medium material, the component with Brillouin frequency shift in the feedback light is that the Stokes seed light is amplified and compressed by the second pump light which is transmitted in the subsequent forward direction, then is output from the front window mirror of the second medium pool 9, is converted into P-type linearly polarized light through the second quarter-wave plate 7, and is output through the reflecting mirror 6 and the polarizing plate 2.
The specific process of generating the compressed pulse after the sufficient coupling reaction in the first brillouin medium pool 5 is as follows:
when strong light passes through a nonlinear medium, medium molecule thermal fluctuation caused by random thermal noise generates spontaneous Brillouin scattering, backward Stokes light generated by the scattering is mutually coupled with pump light, the phonon grating is strengthened through the electrostriction effect, the strengthened phonon grating further increases the intensity of the Stokes light in turn, the two are mutually excited and strengthened, and self-excited SBS is generated when first pump light energy reaches an SBS threshold value, namely the Stokes light intensity reaches 1% of the pump light intensity. In this process, the Stokes light continuously extracts pump light energy in the backward transmission, so that the Stokes light pulse front is effectively amplified and the rising edge becomes steep, thereby forming a typical compression pulse with a steep front.
Suppose that: second pump light Ap; the fresnel reflection of the refractive index difference between the rear window mirror and the dielectric material is r; i.e. feedback light ═ aPR, the feedback light including the clothThe component of the brillouin shift acts as "Stokes" seed light ═ aP·r·η。
Wherein: η is the Stokes energy ratio (i.e. the component of the second pump optical spectrum sideband containing brillouin frequency shift), which can be expressed as:
wherein omegaBIs the brillouin frequency shift of the medium, is the brillouin line width, and f (v) is the spectral distribution of the second pump light.
The second medium pool 9 is a non-focusing medium pool, and is a brillouin medium pool in concrete implementation.
The reflected light from the first dielectric pool 5 (i.e. the compressed pulse after SBS coupling reaction output from the front window mirror of the first dielectric pool 5) is used as the pump light of the second unfocused dielectric pool 9. Wherein, after the "Stokes" light is amplified and compressed by the subsequent pump light and then output from the front window mirror of the second medium pool 9, the output pulse waveform and energy need to be measured through a sampling structure. Meanwhile, the same information is also acquired from the pump source entering the second medium pool 9, i.e. the compressed pulse output from the first medium pool 5 and entering the second medium pool 9 after passing through the beam-shrinking structure 8. Therefore, a wedge-shaped plate 10-1 is inserted between the beam-shrinking structure 8 and the second medium pool 9 to sample the compressed pulse entering from the previous stage, namely the optical pulse of the second-stage pump light, and the waveform of the compressed pulse is recorded by an external oscilloscope after the compressed pulse is received by the photoelectric detector 10-3 (or the photoelectric detector 10-5); measuring the sampled laser pulse energy through an energy meter 10-2 (or an energy meter 10-4); and the other side of the wedge-shaped plate 10-1 can sample the Stokes light pulse output by reflection, similar to the measurement of the pump light parameters.
For the accuracy of the experiment, the types of the energy meters 10-2 and 10-4 and the types of the photodetectors 10-3 and 10-5 after two times of sampling are respectively the same, the two times of sampling are the same, and the embodiment of the invention is only described by taking one time as an example.
Further, the method for acquiring the energy information specifically comprises the following steps:
wedgeThe light pulse reflected by the first surface of the shaped plate 10-1 enters the energy meter 10-2, and the sampled laser energy value E can be measured0. When the sampling rate of the wedge plate 10-1 is determined to be k, the pumping light energy entering the second medium pool 9 is determined to be Ep＝(1-k)·E0。
Wherein, each parameter of the pumping light source laser is as follows:
pulse width tp(ii) a Energy E of the pumpp(ii) a A wavelength λ; the aperture of the light beam phi.
In a specific implementation, one selection method is as follows: the focal length f of the focusing lens 4 is less than or equal to d + d0+L1(d: cell spacing; d0: the thickness of a front window mirror of the medium pool; l is1: the focusing structure medium pool is long. )
Wherein L is1≥leff。
(
leffIs the effective interaction length; c is the speed of light; n is the refractive index of the Brillouin medium, tpIs the pump light pulse width. Cell length L of the unfocused media cell2≥leff。)
Preferably, a combination of a convex lens 8-1 and a concave lens 8-2 is used to reduce the spot area.
Further, the rear window mirror with the wall of the second medium pool 9 is pasted with a high reflection film for increasing the reflectivity of the rear window mirror.
In summary, the present invention first provides a dual-tank self-pumping SBS pulse compression system optical path structure; the conversion of the pulse from nanosecond level to picosecond level is realized. Which helps to improve the stability of the time for generating the compressed pulse. In addition, the system has simple structure and convenient operation, and can be expanded to the application aspect of high-energy pulse compression technology in the future.
In the embodiment of the present invention, except for the specific description of the model of each device, the model of other devices is not limited, as long as the device can perform the above functions.
Those skilled in the art will appreciate that the drawings are only schematic illustrations of preferred embodiments, and the above-described embodiments of the present invention are merely provided for description and do not represent the merits of the embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A dual cell self-pumped SBS pulse compression system, wherein the system comprises:
the tunable laser provides pump light, the pump light passes through the first quarter-wave plate after being analyzed and polarized by the polarizer and is converted into circularly polarized light, and the circularly polarized light is focused into the first medium pool as first pump light after passing through the focusing lens;
the compressed pulse after coupling reaction in the first medium pool is output from the front window mirror and passes through the first quarter-wave plate again, the compressed pulse is converted into S-shaped linearly polarized light by circularly polarized light, is reflected by the polaroid, is converted into circularly polarized light again by the reflector and the second quarter-wave plate, and then enters the second medium pool through the beam shrinking structure to serve as second pumping light;
fresnel reflection of the refractive index difference between the rear window mirror of the second medium pool and the medium material provides feedback light transmitted in the back direction, a component containing Brillouin frequency shift serves as second pump light transmitted in the front direction, the second pump light is amplified and compressed and then output from the front window mirror of the second medium pool, and the second pump light is converted into P-type linear polarized light through the second quarter wave plate and then output through the reflecting mirror and the polarizing plate.
2. The dual cell, self-pumped SBS pulse compression system of claim 1, wherein the tunable laser is continuously pulsed, quasi-continuously pulsed or pulsed in operation.
3. The dual cell self-pumped SBS pulse compression system of claim 1, wherein the polarizer and the horizontal direction are at Brewster's angle θ, the first cell is a focused cell and the second cell is a non-focused cell.
4. The dual cell, self-pumped SBS pulse compression system of claim 1, wherein the beam-reducing structure is a combination of convex and concave lenses.
5. The dual cell, self-pumped SBS pulse compression system of claim 1, wherein the second dielectric cell wall rear window mirror is coated with a highly reflective film for increasing rear window mirror reflectivity.
6. The dual-cell self-pumped SBS pulse compression system according to claim 3, wherein the focal length f of the focusing lens is ≦ d + d0+L1，
Wherein, d: the mirror pool spacing; d0: the thickness of a front window mirror of the medium pool; l is1: the length of the focusing medium pool; l is1≥leff，
leff: an effective interaction length; c: the speed of light; n: the brillouin medium refractive index.
7. The dual cell, self-pumped SBS pulse compression system of claim 1, wherein the system further comprises: the sampling structure is used for sampling the sample,
the reflected light output by the first medium pool is used as the pumping light of the second medium pool, and the Stokes light is amplified and compressed by the subsequent pumping light, then is output from the front window mirror of the second medium pool, and then is subjected to sampling structure to measure the output pulse waveform and energy.
8. The dual cell, self-pumped SBS pulse compression system of claim 7, wherein the sampling structure comprises: a wedge-shaped plate, an energy meter and a photoelectric detector,
the wedge-shaped plate is arranged between the beam-shrinking structure and the second medium pool and is used for sampling the light pulse of the second pump light,
the waveform of the signal is recorded by an external oscilloscope after the signal is received by the photoelectric detector; measuring the sampled laser pulse energy via the energy meter.
9. The dual-cell self-pumped SBS pulse compression system of claim 8, wherein the energy of the energy-meter-measured sampled laser pulses is specifically:
the light pulse reflected on the first surface of the wedge-shaped plate enters an energy meter, and a sampling laser energy value E is measured0And when the sampling rate of the wedge-shaped plate is determined to be k, the pumping light energy entering the second medium pool is Ep＝(1-k)·E0。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114389141A (en) * | 2022-01-13 | 2022-04-22 | 河北工业大学 | Ultrashort pulse laser based on stimulated Raman scattering generation amplification structure |
| CN114389138A (en) * | 2022-01-13 | 2022-04-22 | 河北工业大学 | Pulse width compressor based on stimulated Raman scattering secondary amplification structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1528644A2 (en) * | 2003-10-30 | 2005-05-04 | Metal Improvement Company, LLC. | Stimulated brillouin scattering mirror system, laser system and amplifying method |
| CN1740889A (en) * | 2005-09-22 | 2006-03-01 | 哈尔滨工业大学 | Method for obtaining flat-topped light beam utilizing secondary stimulated Brillouin scattering light amplitude limiting |
| CN101504505A (en) * | 2009-03-16 | 2009-08-12 | 哈尔滨工业大学 | Modulation-eliminating stimulated Brillouin scattering laser pulse compression apparatus |
| CN101887205A (en) * | 2010-03-30 | 2010-11-17 | 南昌航空大学 | Method for amplifying two-cell Brillouin scattering by controlling polarization state |
| CN107121871A (en) * | 2017-06-02 | 2017-09-01 | 中国科学院光电研究院 | A kind of stimulated Brillouin scattering phase conjugate mirror list pool device |
| CN209929677U (en) * | 2019-07-29 | 2020-01-10 | 长春理工大学 | Pulse width adjustable short pulse laser |
| CN212626499U (en) * | 2020-08-03 | 2021-02-26 | 河北工业大学 | Self-pumping SBS pulse compression system of twin-pool |
-
2020
- 2020-08-03 CN CN202010766057.8A patent/CN112038874B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1528644A2 (en) * | 2003-10-30 | 2005-05-04 | Metal Improvement Company, LLC. | Stimulated brillouin scattering mirror system, laser system and amplifying method |
| CN1740889A (en) * | 2005-09-22 | 2006-03-01 | 哈尔滨工业大学 | Method for obtaining flat-topped light beam utilizing secondary stimulated Brillouin scattering light amplitude limiting |
| CN101504505A (en) * | 2009-03-16 | 2009-08-12 | 哈尔滨工业大学 | Modulation-eliminating stimulated Brillouin scattering laser pulse compression apparatus |
| CN101887205A (en) * | 2010-03-30 | 2010-11-17 | 南昌航空大学 | Method for amplifying two-cell Brillouin scattering by controlling polarization state |
| CN107121871A (en) * | 2017-06-02 | 2017-09-01 | 中国科学院光电研究院 | A kind of stimulated Brillouin scattering phase conjugate mirror list pool device |
| CN209929677U (en) * | 2019-07-29 | 2020-01-10 | 长春理工大学 | Pulse width adjustable short pulse laser |
| CN212626499U (en) * | 2020-08-03 | 2021-02-26 | 河北工业大学 | Self-pumping SBS pulse compression system of twin-pool |
Non-Patent Citations (1)
| Title |
|---|
| 王超, 吕志伟, 何伟明: "利用受激布里渊散射获得皮秒激光脉冲", 强激光与粒子束, no. 12, 25 December 2003 (2003-12-25) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114389141A (en) * | 2022-01-13 | 2022-04-22 | 河北工业大学 | Ultrashort pulse laser based on stimulated Raman scattering generation amplification structure |
| CN114389138A (en) * | 2022-01-13 | 2022-04-22 | 河北工业大学 | Pulse width compressor based on stimulated Raman scattering secondary amplification structure |
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