论文标题
狭窄线宽rydberg eIT光谱的腔内频率两倍的VECSEL系统
Intra-Cavity Frequency-Doubled VECSEL System for Narrow Linewidth Rydberg EIT Spectroscopy
论文作者
论文摘要
相对于其他激光技术，垂直的外腔发射激光器（vecsels）增强了被腔内非线性光学频率转换增强，作为紫外线的有吸引力的紫外线源，可见光，可见光，相对于其他激光技术。它们在简单且廉价的系统体系结构中提供高功率，低相位噪声，频率可调性和出色的光束质量。在这里，我们使用延迟的自生态技术在475 nm处具有690 MW的输出功率的频率频率两倍的VECSEL的频率稳定性，并与商业外部腔二极管激光（ECDL）直接比较。我们将基本的Lorentzian线宽衡量为$2π\ times5.3（2）$ kHz，总线宽为$2π\ times23（2）$ kHz。此外，我们通过电磁诱导的透明度（EIT）执行Rydberg-State光谱，观察到狭窄的3.5 MHz全宽度半最大EIT。通过这样做，我们证明了腔内频率的vecsels可以在MHz水平上执行精确光谱，并且是当代和未来的量子技术的有前途的工具。
Vertical external-cavity surface-emitting lasers (VECSELs) augmented by intra-cavity nonlinear optical frequency conversion have emerged as an attractive light source of ultraviolet to visible light for demanding scientific applications, relative to other laser technologies. They offer high power, low phase noise, wide frequency tunability, and excellent beam quality in a simple and inexpensive system architecture. Here, we characterize the frequency stability of an intra-cavity frequency-doubled VECSEL with 690 mW of output power at 475 nm using the delayed self-heterodyne technique and direct comparison with a commercial external-cavity diode laser (ECDL). We measure the fundamental's Lorentzian linewidth to be $2π\times5.3(2)$ kHz, and the total linewidth to be $2π\times23(2)$ kHz. In addition, we perform Rydberg-state spectroscopy via electromagnetically induced transparency (EIT), observing narrow 3.5 MHz full-width half-maximum EIT. By doing so, we demonstrate that intra-cavity frequency-doubled VECSELs can perform precision spectroscopy at the MHz level, and are a promising tool for contemporary, and future, quantum technologies.
