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A new pulsed spectroscopic technique combines optical heterodyne detection with frequency binning. Its utility is demonstrated via Doppler-free two-photon excitation in cesium using an injection-seeded pulsed optical parametric oscillator, operated close to the Fourier-transform limit.
A dramatic enhancement of harmonics and the extension of cutoff were observed in a linearly polarized two-color laser field below 10 nm. The intense soft X-ray supercontinuum provides an alternative for the attosecond generation.
Polarization gated high harmonic generation was phase matched to produce 104 XUV photons per shot. This allowed us to observe the dependence of the XUV supercontinuum on the carrier envelope phase of the laser pulses.
When the laser field consisting of sub-10-fs fundamental and its second harmonic was used for high harmonic generation, a continuum centered at 30 nm with a spectral bandwidth of 8 nm was obtained with an energy of 10 nJ.
Recent work in frequency-conversion of pulsed fiber-amplifiers is reviewed. Design criteria of frequency converters for fiber sources in operating the wavelength range between 1 um and 2 um are discussed.
We report on the generation of 550 mW of 460 nm blue radiation by single pass frequency doubling the picosecond pulses of a mode-locked InGaAs diode laser MOPA system in periodically poled KTP.
Computational study of nanosecond pulse laser radiation in periodically poled LiNbO3 crystals reveals the complex spatio-temporal evolution of the 1.064 mum fundamental harmonic and second harmonic energy fields with associated temperature fields, leading to the thermal dephasing and inhibition of second harmonic generation.
High-harmonic generation is achieved at 100 MHz repetition rates by utilizing a femtosecond enhancement cavity to increase peak intensities from a mode-locked laser. This provides a coherent frequency comb in the VUV for high-resolution spectroscopy.
We study adiabatic soliton compression of femtosecond pulses in second harmonic generation by using chirped quasi-phase-matching gratings in the absence of group velocity mismatching. Two GV-matching schemes on collinear and non-collinear QPM are numerically investigated.
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