A novel harmonic mode-locked fiber laser based on nonlinear multimode interference (NL-MMI) in a microfiber-assisted ultrafast optical switch is proposed this Letter. The can be obtained by tapering the splicing point of graded-index (GIMF) and single-mode fiber, which not only helps to shorten self-imaging period GIMF relax strict requirement NL-MMI length but also improves order. In experimen...

We introduce a non-interferometric single beam method for automated spectral phase characterization and adaptive pulse compression of amplified ultrashort femtosecond pulses taking advantage of third order harmonic generation in air. This new method, air-MIIPS, compensates high-order phase distortions based on multiphoton intrapulse interference phase scan (MIIPS).

This extended abstract describes our submission to the MIREX 2008 evaluation task on Audio Melody Extraction. This algorithm has specifically been designed for vocal F0 extraction in the presence of harmonic interference. The results of the evaluation show high pitch estimation accuracy of our method but lower melodic voice detection accuracy than other submissions.

The use of specific symmetry properties of the optical second-harmonic generation (the s,s-exclusion rule) has allowed us to observe high-contrast hyper-Rayleigh interference patterns in a completely diffuse light-an effect having no analog in case of linear (Rayleigh) scattering.

Refractive index measurements of uniaxial media at wavelengths in the I-Rspectrum are described. The experimental technique makes use of the birefringence to generate interference between the extraordinary and ordinary waves created after an incident plane polarized wave enters the crystal. The use of harmonic generation to convert I-Rradiations to

We present experimental data on the coherent control of frequency conversion toward the vacuum-ultraviolet regime in xenon atoms, applying intense ultrashort picoseconds (ps) radiation pulses. We report on quantum interference between two resonantly enhanced frequency conversion processes (i.e., fifth harmonic generation and four-wave mixing). The conversion processes are driven by a fundamenta...