title: Very broad gain bandwidth parametric amplification in nonlinear crystals at critical wavelength degeneracy.
abstract: Gain spectra were calculated at critical wavelength degeneracy (CWD) in a collinear phase-matching geometry optical parametric amplification (OPA) process. The frequency bandwidth available through CWD-OPA is broader compared to the gain bandwidth obtained by the non-collinear OPA geometry. A solution for very broad bandwidth chirped pulse amplification based on partially deuterated DKDP (P-DKDP) crystals, pumped by pulsed green lasers, is proposed. 1.38x10(14) Hz frequency bandwidth and peak intensity gain G approximately 62 were calculated in a 5-mm long 58% deuterated DKDP crystal, pumped by 527-nm wavelength at 64-GW/cm2 intensity. Parametric amplification at CWD in few-mm thin P-DKDP crystals, pumped by picosecond pulses of nearly 100-GW/cm2 intensity, possesses a true potential for generating high energy laser pulses compressible to one-cycle duration.
authors.affiliation: National Institute for Laser, Plasma and Radiation Physics, Atomistilor Str. 409, 077125 Bucharest, Romania. razvan.dabu@inflpr.ro
authors.forename: R
authors.initials: R
authors.lastname: Dabu
mesh_terms: D000669:Amplifiers, Electronic; D017076:Computer-Aided Design; D003460:Crystallization; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D017711:Nonlinear Dynamics