title: Simultaneous second-harmonic generation with two orthogonal polarization states in periodically poled KTP.
abstract: Simultaneous generation of second-harmonic light with orthogonal polarizations in the blue spectral region is demonstrated by use of typeII and typeI quasi-phase matching for the nonlinear coefficients d(33) , d(24) , and d(32) in periodically poled KTP. The second-harmonic power ratio in both polarization states can be tuned by the fundamental polarization and (or) the periodically poled KTP temperature. Femtosecond pulse frequency-doubling efficiencies of as much as 39.5% W (-1) and 8.1% W (-1) are demonstrated in 7-mm periodically poled KTP for typeI and typeII processes, respectively. The efficiency limitations caused by various effects of the group-velocity mismatch are discussed.
authors.forename: V
authors.initials: V
authors.lastname: Pasiskevicius
authors.forename: S J
authors.initials: SJ
authors.lastname: Holmgren
authors.forename: S
authors.initials: S
authors.lastname: Wang
authors.forename: F
authors.initials: F
authors.lastname: Laurell