Stimulated Thermal Rayleigh Scattering

Rank, D. H.; Cho, C. W.; Foltz, N. D.; Wiggins, T. A.

doi:10.1103/physrevlett.19.828

Cited by 112 publications

(27 citation statements)

References 6 publications

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“…If such a liquid were present in the laser cavity a dynamic increase in feedback would be expected. A 2 cm cell containing a solution of iodine in carbon tetrachloride (as used for the reported observation of stimulated thermal Rayleigh scattering [25]) when placed in the ruby laser cavity did show some pulse sharpening (width approximately 150 nsec). However, solutions having an absorption coefficient greater than 0.1 cm -1 were required for observing the stimulated Rayleigh effect [24,25], whereas pulse sharpening behaviour occurs in liquids with an absorption as low as 0.01 cm -1 (using the neodymium laser).…”

Section: Discussionmentioning

confidence: 98%

Laser Q-switching by organic solvents

1969

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The role of the solvent in the passive Q-switching of lasers by solutions of organic dyes has been examined in detail. It was found that several pure organic solvents could themselves partially Q-switch the laser, in the absence of the dye. This behaviour was observed for both ruby and neodymium : glass lasers. Pulse-widths as short as 20 nsec were occasionally recorded. Peak powers up to 2 MW have been observed using 1-chloronaphthalene to switch a ruby laser. It is proposed that Q-switching arises from an enhancement of reflectivity of the liquid, during the evolution of the laser pulse, through the formation of a periodic refractive index modulation in the liquid by the action of standing waves.

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Section: Discussionmentioning

confidence: 98%

Laser Q-switching by organic solvents

1969

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“…Another less known type of stimulated scattering is the so-called stimulated thermal Rayleigh scattering (STRS) that was observed in linearly (one-photon) absorbing media and was originally attributed to light-induced thermal (temperature) fluctuation. [9][10][11] In this case an unusual * E-mail: gshe@acsu.buffalo.edu feature was the anti-Stokes frequency-shift of the stimulated scattering predicted by the original theory 9 . The predicted frequency-shift value was about a half of the spectral line-width of the pump laser, which was partially proven by the earliest experimental results obtained in I 2 -added solvents (such as CCl 4 ).…”

Section: Introductionmentioning

confidence: 94%

Two-photon absorption induced stimulated Rayleigh-Bragg scattering

Prasad

2005

SPIE Proceedings

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A frequency-unshifted and backward stimulated scattering can be efficiently generated in one-photon-absorption free but two-photon absorbing materials. Using a number of novel two-photon absorbing dye solutions as the scattering media and nanosecond pulsed laser as the pump beams, a highly directional backward stimulated scattering at the exact pump wavelength can be readily observed once the pump intensity is higher than a certain threshold level. The spectral and spatial structures as well as the temporal behavior and optical phase-conjugation property of this new type of backward stimulated scattering have been experimentally studied. This stimulated scattering phenomenon can be explained by using a model of two-photon-excitation enhanced standing-wave Bragg grating initially formed by the strong forward pump beam and much weaker backward Rayleigh scattering beam; the partial reflection of the pump beam from this grating provides an positive feedback to the initial backward Rayleigh scattering beam without suffering linear attenuation influence.Comparing to other known stimulated (Raman, Brillouin, Rayleigh-wing, and Kerr) scattering effects, the stimulated Rayleigh-Bragg scattering exhibits the advantages of no frequency-shift, low pump threshold, and low spectral linewidth requirement.

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“…The existence of a large gain was first experimentally demonstrated by Rank et al [9]. They used a single mode ruby giant pulse laser delivering up to 50 MW peak power and a pulse duration of 14 ns which was focused onto a cell of 10 em length filled with various organic liquids.…”

Section: Sts I N Absorbing Liquidsmentioning

confidence: 98%

Stimulated thermal scattering of light

Batra

Enns

Pohl

1971

Physica Status Solidi (b)

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c) Stimulated Thermal Scattering of Light BY I. P. BATRA (a), R. H. ENNS (b), and D. POHL (c) Contents I . Zntroductioii 2. Theory 2.1 Basic description of the scattering problem 2.2 Solution of equations 2.3 Steady state theory 2.4 Transient theory 2.5 Eleetrocaloric effect 2.6 Picosecond pulses 3. Experiment 3.1 General considerations 3.2 Generator experiments 3.3 Amplifier experiments 3.4 STS of short pulses 4. Rliscellaneotcs experiments involving S T S and relnted effects 4.1 The transitory hologram 4.2 Amplitude or phase grating ? 4.3 Passive &-switching and STS 4.4 Stimulated concentration scattering (SCS) Conclusion rlppendia:References [8]. The latter referred to this scattering as stimulated thermal scattering (STS). Jn the Russian literature, it is referred to as STS-TT t o distinguish i t from STS-T.

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Stimulated Thermal Rayleigh Scattering

Cited by 112 publications

References 6 publications

Laser Q-switching by organic solvents

Laser Q-switching by organic solvents

Two-photon absorption induced stimulated Rayleigh-Bragg scattering

Stimulated thermal scattering of light

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