Theory of sound amplification by stimulated emission of radiation with consideration for coagulation

Volkov, I. V.; Zavtrak, S. T.; Kuten, I. S.

doi:10.1103/physreve.56.1097

Cited by 7 publications

(7 citation statements)

References 5 publications

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“…This results in more than three orders of magnitude radiating species in the bubble than the earlier SBSL-produced process. Larger bubble volume makes the LI-SCBL method even more attractive, especially for the recent application of sound amplification by stimulated emission of radiation (SASER) due to its larger SASER cavity [31,32]. In spite of the larger bubble radius induced by laser, the bubble interior pressure and temperature are smaller than the ones for SBSL.…”

Section: Introductionmentioning

confidence: 97%

Quasiadiabatic approach for laser-induced single-bubble sonoluminescence

et al. 2012

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The luminescence parameters of laser-induced bubble in the presence of an acoustic field in water are studied. A comparison is made between parameters such as bubble radius, interior temperature, and pressure of the bubble induced by laser and an acoustic field influenced by different driving pressure amplitudes. It is found that the bubble volume induced by laser at the collapse instant is more than 10(6) times larger than the one induced by an acoustic field. It is also noticed, by increasing the driving pressure amplitude, the bubble radius decreases in both cases, however, the bubble interior pressure and temperature increase.

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Section: Introductionmentioning

confidence: 97%

Quasiadiabatic approach for laser-induced single-bubble sonoluminescence

et al. 2012

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“…By changing the width of the superlattice layers, the amplified phonon frequency can be chosen in a wide range. Our amplification concept holds potential for intense sources of coherent acoustic phonons in the sub-THz frequency range and may become a key ingredient of devices based on sound amplification by stimulated emission of radiation (SASER) [23,24]. With such sources of sub-THz coherent phonons it will be possible to study phonon propagation and dephasing with much higher sensitivity and precision than presently possible.…”

mentioning

confidence: 99%

Strong Amplification of Coherent Acoustic Phonons by Intraminiband Currents in a Semiconductor Superlattice

et al. 2016

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Sound amplification in an electrically biased superlattice (SL) is studied in optical experiments with 100 fs time resolution. Coherent SL phonons with frequencies of 40, 375, and 410 GHz give rise to oscillatory reflectivity changes. With currents from 0.5 to 1.3 A, the Fourier amplitude of the 410 GHz phonon increases by more than a factor of 2 over a 200 ps period. This amplification is due to stimulated Čerenkov phonon emission by electrons undergoing intraminiband transport. The gain coefficient of 8×10^{3} cm^{-1} is reproduced by theoretical calculations and holds potential for novel sub-THz phonon emitters.

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“…Classical laser designs [13][14][15][16][17][18][19] have been proposed but little has yet been realized in the laboratory. Here we report construction of nonlinear electronic oscillators coupled piezoelectrically to an elastic body and capable of both spontaneous and stimulated emission.…”

Section: Introductionmentioning

confidence: 99%

“…Laser oscillation is not necessarily a quantum phenomenon. Classical laser designs [1][2][3][4][5][6] have pedagogic value but no devices have yet been constructed, and the designs have played no role in laser research. Here we report construction of nonlinear classical oscillators in contact with an acoustic cavity and capable of both spontaneous and stimulated emission.…”

Section: Introductionmentioning

confidence: 99%

Entrainment and stimulated emission of ultrasonic piezoelectric auto-oscillators

Weaver

Lobkis

Yamilov

2007

The Journal of the Acoustical Society of America

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Theoretical modeling and laboratory tests are conducted for nonlinear auto-oscillating piezoelectric ultrasonic devices coupled to reverberant elastic bodies. The devices are shown to exhibit behavior familiar from the theory of coupled auto-oscillators. In particular, these spontaneously emitting devices adjust their limit-cycle frequency to the spectrum of the body. It is further shown that the auto-oscillations can be entrained by an applied field; an incident wave at a frequency close to the frequency of the natural limit cycle entrains the oscillator. Special attention is paid to the phase of entrainment. Depending on details, the phase is such that the oscillator can be in a state of stimulated emission: the incident field amplifies the ultrasonic power emitted by the oscillator. These behaviors are essential to eventual design of an ultrasonic system that would consist of a number of such devices all synchronized to their mutual field, a system that would be an analog to a laser. A prototype uaser is constructed.

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Theory of sound amplification by stimulated emission of radiation with consideration for coagulation

Cited by 7 publications

References 5 publications

Quasiadiabatic approach for laser-induced single-bubble sonoluminescence

Quasiadiabatic approach for laser-induced single-bubble sonoluminescence

Strong Amplification of Coherent Acoustic Phonons by Intraminiband Currents in a Semiconductor Superlattice

Entrainment and stimulated emission of ultrasonic piezoelectric auto-oscillators

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