Tian Yuhang, Wang Yajun, Wang Weijie, Sun Xiaocong, Li Yuhang, Shi Shaoping, Tian Long, Zheng Yaohui
Shanxi University, State Key Laboratory of Quantum Optics Technologies and Devices, Institute of Opto-Electronics, Taiyuan 030006, China.
Shanxi University, Collaborative Innovation Center of Extreme Optics, Taiyuan 030006, China.
Phys Rev Lett. 2025 Jun 20;134(24):243803. doi: 10.1103/3bdr-njhy.
We report the first experimental demonstration of squeezed lasing in a reservoir-engineered optical parametric oscillator (OPO). The OPO provides a basis of squeezed states and parametric amplification in lasing emission, whose vacuum reservoir is coupled to a squeezed vacuum generated by a second OPO. With a precisely controlled squeezing angle and strong squeezing injection, the parametric interaction in the first OPO is exponentially enhanced. It successfully circumvents the decoherence in the system, and eliminates the undesired noise of spontaneous photon emission in the OPO. As a result, the amplified parametric process simultaneously reserves the coherence and quantum properties in the first OPO, and yields a -6.1 dB squeezed laser in optical domain with a narrow linewidth and high brightness. Our work sheds light on potential applications of squeezed lasing in quantum metrology and quantum optics.
我们报告了在一种基于储能工程的光学参量振荡器（OPO）中首次实现压缩激光的实验演示。该OPO为激光发射中的压缩态和参量放大提供了基础，其真空储能与由另一个OPO产生的压缩真空相耦合。通过精确控制压缩角和强压缩注入，第一个OPO中的参量相互作用呈指数增强。它成功地规避了系统中的退相干，并消除了OPO中不需要的自发光子发射噪声。结果，放大的参量过程在第一个OPO中同时保留了相干性和量子特性，并在光域产生了线宽窄且亮度高的-6.1 dB压缩激光。我们的工作为压缩激光在量子计量学和量子光学中的潜在应用提供了启示。
