Isitituto Nazionale di Ottica (INO)-CNR, Largo Fermi 6, 50125 Firenze FI, Italy.
Opt Lett. 2010 Nov 1;35(21):3616-8. doi: 10.1364/OL.35.003616.
A cw mid-IR coherent source based on difference-frequency generation is designed and characterized. For mid-IR generation, a periodically poled MgO:LiNbO(3) crystal is placed inside a compact Ti:sapphire laser cavity. This provides high-power pump radiation for the nonlinear process. Optical injection by an external-cavity diode laser ensures single-frequency operation of the Ti:sapphire laser, while signal radiation is provided by a fiber-amplified Nd:YAG laser. Mid-IR radiation can be generated with 3850-4540 nm tuning range, narrow linewidth, Cs-standard traceability, and TEM(00) spatial mode. 30 mW power is obtained at 4510 nm.
设计并表征了一种基于差频产生的连续波中红外相干光源。为了实现中红外产生，将周期性极化的 MgO:LiNbO(3) 晶体放置在紧凑的钛宝石激光腔内。这为非线性过程提供了高功率的泵浦辐射。外部腔二极管激光器的光注入确保了钛宝石激光的单频操作，而信号辐射则由光纤放大的 Nd:YAG 激光提供。中红外辐射可在 3850-4540nm 的调谐范围内实现，具有窄线宽、铯标准可追溯性和 TEM(00)空间模式。在 4510nm 处获得了 30mW 的功率。
