- Jacob B Khurgin: Johns Hopkins University, Baltimore Maryland 21218, USA. jakek@jhu.edu
We predict that employing a Bragg grating to simultaneously phase match and induce large temporal walk-off between the signal and slow propagating pump in a nonlinear crystal can be conducive to development of passively mode locked optical parametric oscillators in which cw near-infrared pump is efficiently converted into short middle-infrared pulses.