通过注入锁定到光子集成电路光学参量振荡器实现高功率可见光激光

中文摘要 AI 辅助

Kerr光子集成电路光学参量振荡器（PIC OPO）为相干可见光产生提供了一个有前景的平台，具有宽波长可及性和低频率噪声，适用于量子信息处理、精密计量、光谱学和传感等应用。然而，实现大的光纤耦合输出功率和高转换效率仍然具有挑战性，影响了这些光源的实际部署。在这里，我们演示了一种商用可见光法布里-珀罗（FP）激光二极管对PIC OPO的光学注入锁定，实现了一种结合非线性频率转换与半导体激光技术互补优势的混合激光器。使用25 μW的注入PIC OPO信号，我们在635 nm处产生相干可见光，光纤耦合输出功率约为40 mW，边模抑制比≥36.3 dB。注入锁定的FP激光器忠实地继承了PIC OPO信号的低频率噪声特性，实现了714 Hz²/Hz的频率噪声底限。我们进一步展示了≥1 GHz的宽锁定带宽，无需主动PIC OPO稳定即可实现稳定注入锁定，同时具有6 nm的粗波长调谐范围，并保持高输出功率和光谱纯度。我们的结果确立了将光学注入锁定与非线性光源相结合作为相干、高功率和波长可调谐集成相干可见光源的有力选择。

英文摘要

Kerr photonic integrated circuit optical parametric oscillators (PIC OPOs) provide a promising platform for coherent visible-light generation, offering broad wavelength accessibility and low frequency noise for applications in quantum information processing, precision metrology, spectroscopy, and sensing. However, achieving large fiber-coupled output powers and high conversion efficiency remains challenging, impacting the practical deployment of these sources. Here we demonstrate optical injection locking of a commercially available visible Fabry-Pérot (FP) laser diode to a PIC OPO, realizing a hybrid laser that combines the complementary strengths of nonlinear frequency conversion with those of semiconductor laser technologies. Using 25 $μ$W of injected PIC OPO signal, we generate coherent visible-light at 635 nm with a fiber-coupled output power of $\approx$ 40 mW and side-mode suppression ratio $\gtrsim$ 36.3 dB. The injection-locked FP laser faithfully inherits the low frequency noise characteristics of the PIC OPO signal, achieving a frequency noise floor of 714 Hz$^2$/Hz. We further demonstrate $\gtrsim1$ GHz wide locking bandwidths that enable stable injection locking without active PIC OPO stabilization, together with coarse wavelength tunability over 6 nm while preserving both high output power and spectral purity. Our results establish optical injection locking with nonlinear light sources as a compelling option for coherent, high-power, and wavelength-agile integrated coherent visible sources.

发表机构

• National Institute of Standards and Technology（美国国家标准与技术研究院）
• Joint Quantum Institute, NIST/University of Maryland（NIST/马里兰大学联合量子研究所）
• Tsinghua University（清华大学）

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