论文标题
集成的Pockels激光器
Integrated Pockels Laser
论文作者
论文摘要
综合半导体激光器的开发使传统的笨重激光系统微型化，从而实现了广泛的光子应用。从基于III-V的激光器到III-V/外部空腔结构的进展已在不同的材料系统中利用低损失的波导，从而显着改善了激光相干性和稳定性。但是，尽管取得了这些成功，但仍然没有关键功能。在这项工作中，我们通过将Pockels效应整合到半导体激光器中来解决一个严重的缺失功能。使用混合综合的III-V/Niobate结构，我们演示了以前的集成激光器中不存在的几种基本功能。其中包括创纪录的频率调制速度为2 exahertz/s（2.0 $ \ times $ 10 $^{18} $ hz/s）和50 MHz的快速切换，这两种都可以通过集成电子光效应而成为可能。此外，该设备通过第二谐波频率转换过程（第一个集成的多色激光器）在红外线和可见频率上共同循环。结合其狭窄的线宽和广泛的可调性，这种新型的集成激光器对许多应用，包括Lidar，Microwave Photonics，Atomic Physics和AR/VR有望。
The development of integrated semiconductor lasers has miniaturized traditional bulky laser systems, enabling a wide range of photonic applications. A progression from pure III-V based lasers to III-V/external cavity structures has harnessed low-loss waveguides in different material systems, leading to significant improvements in laser coherence and stability. Despite these successes, however, key functions remain absent. In this work, we address a critical missing function by integrating the Pockels effect into a semiconductor laser. Using a hybrid integrated III-V/Lithium Niobate structure, we demonstrate several essential capabilities that have not existed in previous integrated lasers. These include a record-high frequency modulation speed of 2 exahertz/s (2.0$\times$10$^{18}$ Hz/s) and fast switching at 50 MHz, both of which are made possible by integration of the electro-optic effect. Moreover, the device co-lases at infrared and visible frequencies via the second-harmonic frequency conversion process, the first such integrated multi-color laser. Combined with its narrow linewidth and wide tunability, this new type of integrated laser holds promise for many applications including LiDAR, microwave photonics, atomic physics, and AR/VR.
