Femtosecond visible optical parametric oscillator

Ultra-broadband near-infrared NOPAs based on the nonlinear crystals BiBO and YCOB

“…In the software that we developed, the system of equations is solved for the envelope of the fields in a plane wave scenario, and it does not take into account spatial effects like diffraction or birefringence, nor high-order temporal effects such as cascaded nonlinear effects. The only spatial effect taken into account is the walk-off, which, although being a 2D effect, may be inserted as a lossy term [36,37] , with its coefficient estimated as…”

Experimental and theoretical analysis of white-light seeded, collinear phase-matching, femtosecond optical parametric amplifiers

“…where j ϭ P, S, I stand for pump, signal, and idler waves, respectively, A j (z, t) is the field envelope, k j is the wave vector, and j is the carrier frequency of wave j. In the collinear phase-matching configuration the nonlinear coupling equations can be derived as 3,19 ‫ץ‬B…”

“…(5)-(7) can be simplified to those used by other groups of researchers when the phase mismatch is assumed to be zero. 19,20 The third-order nonlinear optical processes in Eqs. (2)-(4) are self-phase and cross-phase modulation.…”

“…Numerical simulations that include material dispersion, field depletion, and other relevant effects have been performed for ultrafast OPA. [18][19][20][21][22] In particular, Bakker et al 18 presented a modified Runge-Kutta method and quantitatively studied the effects of group-velocity mismatch (GVM), phase mismatch, and field depletion on laser pulses in second-order optical processes. 18 Gale et al further incorporated groupvelocity dispersion (GVD) and third-order nonlinearities to compare their simulation results with experimental measurements.…”

“…18 Gale et al further incorporated groupvelocity dispersion (GVD) and third-order nonlinearities to compare their simulation results with experimental measurements. 19,20 They successfully incorporated cascaded second-order optical nonlinearity in simulations to explain pulse self-compression behavior.…”