Kiefer Daniel, Hepp Sebastian, Walther Thomas
Opt Lett. 2020 Aug 15;45(16):4488-4491. doi: 10.1364/OL.397893.
This Letter presents a pulsed, Fourier transform limited 1030 nm laser with a variable pulse duration between 47 and 733 ps resulting in a spectral bandwidth of roughly 1 to 10 GHz. The laser system is based on ytterbium-doped fiber amplifiers and acousto-optic and electro-optic modulation technology. The repetition rate can be set arbitrarily between 1 and 10 MHz. After three sequential amplifier stages, the average output power reaches a maximum of over 60 W. The particular fiber amplifier geometry allows to prevent the emergence of unwanted nonlinear effects. Due to its unique features, the laser system lends itself to a variety of applications wherever flexibility in terms of pulse duration and corresponding Fourier limited bandwidth are required, such as laser cooling at storage rings, lidar applications, or coherent molecular spectroscopy.
本信函介绍了一种脉冲式、傅里叶变换受限的1030纳米激光器，其脉冲持续时间在47至733皮秒之间可变，光谱带宽约为1至10吉赫兹。该激光系统基于掺镱光纤放大器以及声光和电光调制技术。重复频率可在1至10兆赫兹之间任意设定。经过三级连续放大后，平均输出功率最高可达60瓦以上。特殊的光纤放大器结构可防止出现不必要的非线性效应。由于其独特特性，该激光系统适用于各种需要脉冲持续时间和相应傅里叶受限带宽灵活性的应用，如储存环中的激光冷却、激光雷达应用或相干分子光谱学。
