All-solid-state tunable continuous-wave ultraviolet source with high spectral purity and frequency stability.
All-solid-state tunable continuous-wave ultraviolet source with high spectral purity and frequency stability.
复制标题
全固态可调谐连续波紫外光源，具有高光谱纯度和频率稳定性。
作者：
H. Schnitzler;U. Fröhlich;T. Boley;A. E. Clemen;J. Mlynek;A. Peters;S. Schiller
我们提出了一种新的方法来产生高频稳定，广泛可调谐的单频连续紫外光，适用于高分辨率光谱。对两个基波采用单腔谐振的两个固态源的和频产生（SFG）。利用高度稳定的窄线宽倍频连续波Nd:YAG激光器作为主激光器，从SFG腔和Ti：蓝宝石激光器的其他基波，我们在313 nm左右产生了输出功率为33 mw的紫外辐射。另外，我们使用二极管激光器代替钛蓝宝石激光器，在313 nm处产生2.1 mW的输出功率。通过这两种设置，我们获得了> - 15 GHz的连续可调性，亚兆赫范围内的短期频率波动，低于100 MHz/h的长期频率漂移，以及几个小时的稳定运行。给出了优化的双谐振SFG理论。
We present a novel approach for the generation of higly frequency-stable, widely tunable, single-frequency cw UV light that is suitable for high-resolution spectroscopy. Sum-frequency generation (SFG) of two solid-state sources with a single cavity resonant for both fundamental waves is employed. Using a highly stable, narrow-linewidth frequency-doubled cw Nd:YAG laser as a master laser and slaving to it the SFG cavity and the other fundamental wave from a Ti:sapphire laser, we generate UV radiation of 33-mW output power around 313 nm. Alternatively, we use a diode laser instead of the Ti:sapphire laser and produce an output power of 2.1 mW at 313 nm. With both setups we obtain a continuous tunability of >15 GHz, short-term frequency fluctuations in the submegahertz range, a long-term frequency drift below 100 MHz/h, and stable operation for several hours. The theory of optimized doubly resonant SFG is also given.