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Optical parametric oscillator pumped at ~one µm with intracavity mid-IR difference-frequency technology in OPGaAsWe report on the femtosecond optical parametric oscillator (OPO) for your deep-infrared (deep-IR) based on the Kerr-lens-mode-locked Ti:sapphire laser since the pump source. By deploying a novel cascaded intracavity arrangement, compris