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Summary form only given. Potassium titanyl arsenate (KTA) has the advantage of enhanced transparency in the mid-infrared region (3 /spl mu/m) over KTP, which is the well established material for up-converting 1-/spl mu/m laser radiation into the 1.5-/spl mu/m region. Although parametric oscillation in KTP at 3.26 /spl mu/m has been demonstrated: the absorption of the idler wavelength is critical in...
Summary form only given. We present results obtained with a system where a Ti:sapphire-pumped femtosecond optical parametric oscillator (OPO) based on critically phase-matched KTiOAsO/sub 4/ (KTA) generates pulses covering the 2.8-4-/spl mu/m region in the idler branch and 1.08-1.2 /spl mu/m in the signal branch. Similar devices based on KTA and KTP have previously produced idler pulses of up to 1...
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