Study of raman enhanced nondegenerate four-wave mixing

Yu, Z. X.; Lu, Hsingmin; Ye, Peixian; Fu, Peng

doi:10.1016/0030-4018(87)90109-x

Cited by 15 publications

(13 citation statements)

References 12 publications

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“…After passing through a polarizer, the RENFWM signal was detected by a photodiode and then fed into an EG8cG 4203 signal averager for data averaging. A computer was used for data processing and for controlling the stepping motor to vary the relative can be suppressed greatly, therefore the RENFWM spectrum has symmetrical line shape [10]. Our results are shown in Fig.…”

Section: Introductionmentioning

confidence: 85%

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Time-delayed Raman-enhanced nondegenerate four-wave mixing with a broadband laser source

Qian

et al. 1993

Phys. Rev. A

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We report an experiment of the time-delayed Raman-enhanced nondegenerate four-wave mixing (RENFWM) with a broadband laser in carbon disulfide (CS2). We studied the RENFWM signal intensity as a function of the relative time delay~between two beams which originate from a single broadband laser source. Our results indicate that the temporal behavior of the RENFWM is asymmetric with the maximum of the signal shifted from~=0. Furthermore, unlike the corresponding coherent Stokes Raman scattering (CSRS) no coherent spike appears at~=0. From our experimental results the relaxation time of the Raman mode can be extracted directly. We present a second-order coherence function theory to elucidate the physics of the basic features of the time-delayed RENFWM. We also discuss the difference between the RENFWM and the CSRS from a physical viewpoint.PACS number(s): 42.65.Dr, 42.65.Hw

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Section: Introductionmentioning

confidence: 85%

“…Section IV is the discussion and conclusion. RENFWM is a third-order nonlinear phenomenon with three incident beams involved [9,10]. The basic geometry is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Time-delayed Raman-enhanced nondegenerate four-wave mixing with a broadband laser source

Qian

et al. 1993

Phys. Rev. A

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“…The most commonly used coherent Raman spectroscopy is coherent anti-Stokes Raman scattering (CARS) [3] and Raman-induced Kerr-eff'ect spectroscopy (RIKES) [4]. Recently, we have made a detailed study of Raman-enhanced nondegenerate fourwave mixing (RENFWM) [5] and demonstrated that it has the features of nonresonant background suppression, free choice of interaction volume, and simple optical alignment.…”

Section: Introductionmentioning

confidence: 99%

Theoretical study of the suppression of thermal background in the Raman-enhanced nondegenerate four-wave-mixing spectrum by a time-delayed method

et al. 1992

Phys. Rev. A

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We have studied theoretically the dependence of the Raman-enhanced nondegenerate four-wavemixing (RENFWM) spectrum on the relative time delay between two pump beams~when a thermal effect exists in the sample. Using the chaotic model for the incident laser beams, we give the conditions that the thermal background can be eliminated completely when the relative time delay is much longer than the laser coherence time. In this limit, the theoretical RENFWM spectra show the normal asymmetry due to the interference between the Raman-resonant term and the nonresonant background originating solely from the molecular-reorientational grating. We then turn our attention to the dependence of the RENFWM signal intensity on the relative time delay when the laser frequencies are fixed. Our results indicate that RENFWM is asymmetric about~=0 and the maximum of the RENFWM signal does not occur at~=0. When the beating frequency between the pump beam and the probe beam is off resonant from the Raman mode, the RENFWM signal exhibits damping oscillation as the time delay increases. We also show that the temporal behavior of the RENFWM signal is drastically different if the laser sources are described by a phase-diffusion model. The different roles of the phase fluctuation and the amplitude fluctuation can be understood in the time domain. PACS number(s): 42.65.Dr, 42.65.Hw

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“…In contrast to the resonance-enhanced NFWM where the dephasing time can be measured [5], Rayleigh-type NFWM is a nonresonant process and can be employed to measure the longitudinal time. We employed Rayleigh-type NFWM to study the ultrafast molecular dynamics in CS 2 .…”

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Rayleigh-Type Nondegenerate Four-Wave Mixing: Ultrafast Measurement and Field Correlation

Jiang

et al. 2002

Phys. Rev. Lett.

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We report on an ultrafast longitudinal time measurement by a nonresonant Rayleigh-type nondegenerate four-wave mixing (NFWM). We investigated the field-correlation effects on Rayleigh-type NFWM by examining the time-delayed dependence of the NFWM spectra. Based on the field-correlation effects, a time-delayed method is proposed to suppress the thermal effect, and ultrafast relaxation time can be measured even in an absorbing medium.

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Study of raman enhanced nondegenerate four-wave mixing

Cited by 15 publications

References 12 publications

Time-delayed Raman-enhanced nondegenerate four-wave mixing with a broadband laser source

Time-delayed Raman-enhanced nondegenerate four-wave mixing with a broadband laser source

Theoretical study of the suppression of thermal background in the Raman-enhanced nondegenerate four-wave-mixing spectrum by a time-delayed method

Rayleigh-Type Nondegenerate Four-Wave Mixing: Ultrafast Measurement and Field Correlation

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