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High-speed multi-THz-range mode-hop-free tunable mid-IR laser spectrometer

机译:高速多个THz范围无模跳的可调谐中红外激光光谱仪

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摘要

We report on a widely (2.25 THz or 75 cm~(-1)) and rapidly (4.5 THz/s) mode-hop-free (MHF) tunable mid-IR laser source at ~3.3 μm, consisting of a 5%-MgO:LiNbO_3 singly resonant optical parametric oscillator (SRO) pumped by an automated broadly MHF tunable extended-cavity diode laser (ECDL). The broad and rapid MHF tuning capability of the ECDL is readily transferred to the SRO idler wave owing to the quasi-noncritical pump spectral acceptance bandwidth of the quasi-phase-matching. Fast and broadband high-resolution Doppler spectroscopy measurements of the v_3 band of CH_4 are presented to illustrate the performance of the mid-IR optical parametric oscillator spectrometer.
机译:我们报告了一个宽广的(2.25 THz或75 cm〜(-1))和快速(4.5 THz / s)的无模跳(MHF)可调中红外激光源,波长约3.3μm,由5%的MgO:LiNbO_3单谐振光学参量振荡器(SRO)由自动MHF可调宽腔二极管激光器(ECDL)泵浦。由于准相位匹配的准非临界泵浦频谱接受带宽,ECDL的广泛而快速的MHF调谐能力很容易转移到SRO惰轮上。提出了CH_4 v_3波段的快速宽带高分辨率多普勒光谱测量,以说明中红外光学参量振荡器光谱仪的性能。

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