Ru Q, Kawamori T, Schunemann P G, Vasilyev S, Mirov S B, Vodopyanov K L
Opt Lett. 2021 Feb 15;46(4):709-712. doi: 10.1364/OL.403910.
We report a subharmonic (frequency-divide-by-2) optical parametric oscillator (OPO) with a continuous wavelength span of 3 to 12 µm (-37 level) that covers most of the molecular rovibrational "signature" region. The key to obtaining such a wide spectral span is the use of an OPO with a minimal dispersion-through the choice of intracavity elements, the use of all gold-coated mirrors, and a special "injector" mirror. The system delivers up to 245 mW of the average power with the conversion efficiency exceeding 20% from a 2.35 µm Kerr-lens mode-locked pump laser.
我们报道了一种亚谐波（二分频）光学参量振荡器（OPO），其连续波长范围为3至12微米（-37能级），覆盖了大部分分子振转“特征”区域。获得如此宽光谱范围的关键在于使用具有最小色散的OPO——通过选择腔内元件、使用全镀金反射镜以及一个特殊的“注入器”反射镜。该系统从一台2.35微米克尔透镜锁模泵浦激光器获得了高达245毫瓦的平均功率，转换效率超过20%。
