Optical parametric oscillator pumped at ~1 µm with intracavity mid-IR distinction-frequency generation in OPGaAsWe report on a femtosecond optical parametric oscillator (OPO) to the deep-infrared (deep-IR) based on the Kerr-lens-mode-locked Ti:sapphire laser as being the pump resource. By deploying a novel cascaded intracavity arrangement, compris… Read More