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Critically phase-matched Ti:sapphire-laser-pumped deep-infrared femtosecond optical parametric oscillator based on CdSiP2

机译:批判性相匹配的Ti:基于CDSIP2的蓝宝石激光泵浦深红外飞秒光学参数振荡器

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We report a high-repetition-rate femtosecond optical parametric oscillator (OPO) for the deep-infrared (deep-IR) based on type-I critical phase-matching in CdSiP2 (CSP), pumped directly by a Ti: sapphire laser. Using angle-tuning in the CSP crystal, the OPO can be continuously tuned across 7306-8329 nm (1201-1369 cm(-1)) in the deep-IR. It delivers up to 18 mW of idler average power at 7306 nm and 7 mW beyond 8000 nm at 80.5 MHz repetition rate, with the spectra exhibiting bandwidths of 150 nm across the tuning range. Moreover, the signal is tunable across 1128 1150 nm in the near-infrared, providing up to 35 mW of average power in similar to 266 fs pulses at 1150 nm. Both beams exhibit single-peak Gaussian distribution in TEM00 spatial profile. With an equivalent spectral brightness of similar to 5.6 x 10(20) photons s(-1) mm(-2) sr(-1) 0.1% BW-1, this OPO represents a viable alternative to synchrotron and supercontinuum sources for deep-IR applications in spectroscopy, metrology, and medical diagnostics. (c) 2018 Optical Society of America
机译:我们以CDSIP2(CSP)中的I型关键相位匹配,直接通过Ti:蓝宝石激光泵送的I型关键相位匹配,向深红色(Deep-IR)报告一个高重复率的飞秒光学参数振荡器(OPO)。在CSP晶体中使用角度调谐,可以在Deep-IR中横跨7306-8329 nm(1201-1369cm(-1))连续调整OPO。它提供高达惰平均功率的18毫瓦7306 nm和大于7毫瓦超过8000纳米的在80.5兆赫重复率,与光谱表现出&GT的带宽;在整个调谐范围为150nm。此外,在近红外线的1128 1150nm上可调谐信号,其在1150nm处提供高达35 mw的平均功率,类似于266 fs脉冲。两个光束都在TEM00空间轮廓中展示了单峰高斯分布。具有与5.6×10(20)光子S(-1)mm(-2)SR(-1)0.1%BW-1相似的相同光谱亮度,该OPO代表了Synchrotron和SuperContinuum来源的可行替代方案IR在光谱,计量和医疗诊断中的应用。 (c)2018年光学学会

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