title: Coherent broadband light generation with a double-path configuration.
abstract: We generate broadband light by focusing two femtosecond pulses into a Raman-active crystal. By reflecting Raman sideband beams together with the two driving beams back to the same crystal (with a slight spatial offset), we generate sidebands covering a broader spectral range, compared to a single pass. In this novel double-path configuration, multiple Raman sideband beams interact with each other since the phase-matching condition is automatically fulfilled. This scheme enables an enhanced cascaded coherent anti-Stokes scattering process and also doubles the interaction length, thus it allows one to use relatively weak energy pump pulses and thereby avoid optical damage.
authors.forename: Kai
authors.initials: K
authors.lastname: Wang
authors.forename: Miaochan
authors.initials: M
authors.lastname: Zhi
authors.forename: Xia
authors.initials: X
authors.lastname: Hua
authors.forename: James
authors.initials: J
authors.lastname: Strohaber
authors.forename: Alexei V
authors.initials: AV
authors.lastname: Sokolov