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首页> 外文期刊>Optics Letters >Broadband, rapidly tunable Ti:sapphire-pumped BiB_(3)O_(6) femtosecond optical parametric oscillator
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Broadband, rapidly tunable Ti:sapphire-pumped BiB_(3)O_(6) femtosecond optical parametric oscillator

机译：宽带，可快速调谐的Ti：蓝宝石泵浦BiB_（3）O_（6）飞秒光学参量振荡器

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摘要

We report a femtosecond optical parametric oscillator (OPO) based on the nonlinear material BiB_(3)O_(6) (BIBO) pumped directly by a Kerr lens mode-locked Ti:sapphire laser. Using a 1.5mm long BIBO crystal cut at theta velence 11.4 deg for collinear type I (e -> o + o) phase matching in the xz optical plane, femtosecond signal pulses across 1.4-1.6 (mu)m, and idler pulses across 1.6-1.87 (mu)m spectral range are generated, limited by the reflectivity bandwidth of the OPO mirrors. The high nonlinear gain and large spectral acceptance for type I interaction in the xz plane of BIBO permit rapid and continuous tuning across the entire range by simple fine adjustment of OPO cavity delay or through small changes in the pump wavelength, without varying any other parameters. Additionally, owing to the near-zero group velocity mismatch and dispersion, the OPO supports broad spectrum as wide as 33 nm, which results in self-compressed signal pulses. For 150 fs pump pulses, signal pulses with durations down to 106 fs with a time-bandwidth product of 0.48 are obtained without the need for intracavity dispersion compensation.
机译：我们报告飞秒光学参量振荡器（OPO）基于由Kerr透镜锁模Ti：蓝宝石激光器直接泵浦的非线性材料BiB_（3）O_（6）（BIBO）。在xz光学平面中，使用以11.4度角切割的1.5mm长BIBO晶体进行共线I（e-> o + o）相位共线匹配，飞秒信号脉冲跨度为1.4-1.6μm，空转脉冲跨度为1.6产生-1.87μm的光谱范围，受到OPO镜的反射带宽的限制。 BIBO的xz平面中I型相互作用的高非线性增益和大光谱接受度允许通过简单的OPO腔延迟微调或通过泵浦波长的微小变化而在不改变任何其他参数的情况下，在整个范围内进行快速连续的调谐。此外，由于接近零的群速度失配和色散，OPO支持高达33 nm的宽光谱，从而导致自压缩信号脉冲。对于150 fs的泵浦脉冲，无需腔内色散补偿即可获得持续时间低至106 fs且时间带宽积为0.48的信号脉冲。

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