Brillouin lasers providing extremely narrow-linewidth are emerging as a powerful tool for microwave photonics, coherent communications, quantum processors, and spectroscopy. So far, laser performance and applications have been investigated for a handful of select materials and using guided-wave structures such as micro-resonators, optical fibers, and chip-based waveguides. Here, we report a Brillouin laser based on free-space laser action in an extreme optical material. Continuous-wave lasing 167 GHz from a 532 nm pump is demonstrated in diamond using a doubly resonant ring cavity, generating a pump-limited output power of 11 W. The Brillouin gain coefficient is measured to be 79 cm GW⁻¹ with a linewidth of 12 MHz. These properties, along with an exceptionally high Brillouin frequency and wide transmission range, make diamond Brillouin lasers a promising high-power source of narrow-linewidth output and mm-wave beat notes.

中文翻译：

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可见的钻石布里渊激光器

提供极窄线宽的布里渊激光器正在成为微波光子学，相干通信，量子处理器和光谱学的强大工具。到目前为止，已经针对几种选择的材料并使用诸如微谐振器，光纤和基于芯片的波导之类的导波结构研究了激光器的性能和应用。在这里，我们报告一种基于极端光学材料中自由空间激光作用的布里渊激光器。用双共振环形腔在金刚石中演示了从532 nm泵浦发出的167 GHz连续波激光，产生了11 W的泵浦限制输出功率。布里渊增益系数经测量为79 cm GW ^-1线宽为12 MHz。这些特性以及极高的布里渊频率和宽泛的传输范围，使钻石布里渊激光器成为线宽输出和毫米波拍音的有前途的高功率光源。