Moriya Paulo H, Casula Riccardo, Chappell George A, Parrotta Daniele C, Ranta Sanna, Kahle Hermann, Guina Mircea, Hastie Jennifer E
Opt Express. 2021 Feb 1;29(3):3258-3268. doi: 10.1364/OE.416210.
We report the design, growth, and characterization of an AlGaInP-based VECSEL, designed to be optically-pumped with an inexpensive high power blue InGaN diode laser, for emission around 689 nm. Up to 140 mW output power is achieved in a circularly-symmetric single transverse (TEM) and single longitudinal mode, tunable from 683 to 693 nm. With intensity stabilization of the pump diode and frequency-stabilization of the VECSEL resonator to a reference cavity via the Pound-Drever-Hall technique, we measure the power spectral density of the VECSEL frequency noise, reporting sub-kHz linewidth at 689 nm. The VECSEL relative intensity noise (RIN) is <-130 dBc/Hz for all frequencies above 100 kHz. This compact laser system is suitable for use in quantum technologies, particularly those based on laser-cooled and trapped strontium atoms.
我们报告了一种基于AlGaInP的垂直外部腔面发射激光器（VECSEL）的设计、生长和特性，该激光器旨在由廉价的高功率蓝色InGaN二极管激光器进行光泵浦，用于689nm左右的发射。在圆对称单横向（TEM）和单纵向模式下实现了高达140mW的输出功率，波长可在683至693nm之间调谐。通过泵浦二极管的强度稳定以及通过庞德-德雷弗-霍尔技术将VECSEL谐振器的频率稳定到参考腔，我们测量了VECSEL频率噪声的功率谱密度，报告了在689nm处的亚千赫兹线宽。对于高于100kHz的所有频率，VECSEL的相对强度噪声（RIN）小于-130dBc/Hz。这种紧凑型激光系统适用于量子技术，特别是基于激光冷却和捕获锶原子的量子技术。
