Journal ArticleDOI
Self-, cross-, and induced-phase modulations of ultrashort laser pulse propagation
Robert R. Alfano,Ping Pei Ho +1 more
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In this paper, the spectral broadening of the Raman line produced in an optical fiber is compared to the spectral width of the pump-laser line as evidence for cross-phase modulation.Abstract:
Spectral broadenings of picosecond and femtosecond pulses arising from self-phase modulation, cross-phase modulation, induced-phase modulation, and induced spectral broadening in condensed matter are reviewed. The spectral broadening of the Raman line produced in an optical fiber is compared to the spectral width of the pump-laser line as evidence for cross-phase modulation. Induced-phase modulation of a weak picosecond 527-nm laser pulse in BK-7 glass occurred in the presence of an intense picosecond 1054-nm laser pulse. The induced spectral broadening about a weak nonphase-matched second-harmonic pulse at 527 nm is observed by propagating an intense primary 1054-nm picosecond laser pulse through ZnSe crystals. >read more
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Optical Solitons
TL;DR: The theory of optical solitons as well as their experimental investigation has progressed rapidly as discussed by the authors, and optical soliton concepts applied to the description of intense electromagnetic beams and ultrashort pulse propagation in various media have contributed much to this field.
Journal ArticleDOI
Frequency-domain interferometer for femtosecond time-resolved phase spectroscopy
TL;DR: For the first time to the authors' knowledge, transient oscillations were observed in DPS and the spectral shift of a probe pulse was time resolved together with the rise in DPS, which is clear evidence for induced phase modulation in absorptive materials.
Journal ArticleDOI
Cross phase modulation artifact in liquid phase transient absorption spectroscopy
Katrin Ekvall,P. van der Meulen,C. Dhollande,Lars-Erik Berg,Stanislas Pommeret,Ryszard Naskrecki,J.-C. Mialocq +6 more
TL;DR: In this paper, the experimental results for the cross phase modulation induced transient absorption signal in a 1 mm thick fused silica plate using a white light continuum as a probe were compared with those obtained theoretically by numerically solving the set of nonlinear coupled wave equations describing the propagation of the pump and the probe.
Journal ArticleDOI
Color-center generation in silicate glasses exposed to infrared femtosecond pulses
Oleg M. Efimov,K. Gabel,Sergei V Garnov,Leonid B. Glebov,Steve E. Grantham,Martin Richardson,M. J. Soileau +6 more
TL;DR: In this paper, the optical properties of silicate glasses under high-power, 850-nm femtosecond laser irradiation have been studied and it is believed that these processes result from linear and two-photon absorption of the short-wavelength component of the supercontinuum causing ionization of the glass matrix.
Journal ArticleDOI
Generation of 2.6 fs optical pulses using induced-phase modulation in a gas-filled hollow fiber
TL;DR: In this article, the first pulse compression of ultrabroadband white-light continuum generated using both induced and self-phase modulations in an Ar-gas-filled hollow fiber was demonstrated.
References
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Journal ArticleDOI
Self-phase-modulation in silica optical fibers
Roger H. Stolen,Chinlon Lin +1 more
TL;DR: In this paper, the authors report measurements of frequency broadening due to self-phase modulation (SPM) in optical fibers, using single-mode silica-core fibers and mode-locked argon-laser pulses.
Journal ArticleDOI
Anharmonic Decay of Optical Phonons
TL;DR: In this article, an expression for the lifetime of an optical phonon decaying into two acoustical phonons, and its temperature dependence, was derived from perturbation theory, and the strength of the interaction was expressed in terms of the Gruneisen constant and the effect of a strain, equivalent to the instantaneous strain of a optical mode on the frequency spectrum of a linear chain with alternating force constants.
Journal ArticleDOI
Emission in the Region 4000 to 7000 Å Via Four-Photon Coupling in Glass
Robert R. Alfano,S. L. Shapiro +1 more
TL;DR: In this article, four-photon stimulated scattering has been observed in borosilicate glass under high-power 5300-AA{} picosecond-pulse excitation.
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Observation of Self-Phase Modulation and Small-Scale Filaments in Crystals and Glasses
Robert R. Alfano,S. L. Shapiro +1 more
TL;DR: In this paper, small-scale filaments were observed in calcite, quartz, sodium chloride, and several glasses under picosecond pulse excitation, and the physical mechanism responsible for these processes is the change in refractive index resulting from electronic distortion.
Journal ArticleDOI
Parametric amplification and frequency conversion in optical fibers
TL;DR: In this paper, it was shown that the parametric four-photon gain for light pulses decreases for fibers longer than a characteristic length, which is related to the common experimental observation that stimulated parametric emission is usually prominent only in short fibers while in long fibers stimulated Raman scattering dominates.