title: Mode-selective mapping and control of vectorial nonlinear-optical processes in multimode photonic-crystal fibers.
abstract: We demonstrate an experimental technique that allows a mapping of vectorial nonlinear-optical processes in multimode photonic-crystal fibers (PCFs). Spatial and polarization modes of PCFs are selectively excited in this technique by varying the tilt angle of the input beam and rotating the polarization of the input field. Intensity spectra of the PCF output plotted as a function of the input field power and polarization then yield mode-resolved maps of nonlinear-optical interactions in multimode PCFs, facilitating the analysis and control of nonlinear-optical transformations of ultrashort laser pulses in such fibers.
authors.forename: Ming-Lie
authors.initials: ML
authors.lastname: Hu
authors.forename: Ching-Yue
authors.initials: CY
authors.lastname: Wang
authors.forename: You-Jian
authors.initials: YJ
authors.lastname: Song
authors.forename: Yan-Feng
authors.initials: YF
authors.lastname: Li
authors.forename: Lu
authors.initials: L
authors.lastname: Chai
authors.forename: Evgenii
authors.initials: E
authors.lastname: Serebryannikov
authors.forename: Aleksei
authors.initials: A
authors.lastname: Zheltikov