基于薄膜PZT的超快且长期稳定的集成普克尔斯激光器
Ultrafast and long-term stability Integrated Pockels laser with thin-film PZT
AI总结：
利用薄膜锆钛酸铅（PZT）的普克尔斯效应实现频率捷变混合外腔激光器，具有82 nm调谐范围、5.5 ns波长切换时间和超过56.7 dB的边模抑制比。
摘要：
集成可调谐激光器是相干通信、波长路由光互连、光谱学和调频连续波激光雷达的核心，然而芯片级光源很少能同时实现宽波长覆盖、纳秒级切换、高光谱纯度和稳定的高功率运行。本文展示了一种频率捷变混合外腔激光器，该激光器利用薄膜锆钛酸铅（PZT）中的普克尔斯效应实现。PZT的强线性电光响应提供了对紧凑型微环谐振器的直接、非热调谐，波长调谐效率为17 pm/V。与传统的各向异性普克尔斯材料相比，薄膜PZT的近各向同性面内电光行为放宽了晶轴布局约束，允许在紧凑型环形腔中进行高效的Vernier波长选择。PZT谐振器在运行过程中也没有表现出可测量的光折变谐振畸变和可分辨的直流偏置漂移，保持了稳定的波长选择性反馈。所演示的激光器实现了82 nm的调谐范围、5 mW的光纤耦合输出功率、超过56.7 dB的边模抑制比（SMSR）和5.5 ns的波长切换时间。这些结果确立了薄膜PZT光子学作为紧凑、高功率和频率捷变集成激光源的有力电光平台。
英文摘要：
Integrated tunable lasers are central to coherent communications, wavelength-routed optical interconnects, spectroscopy and frequency-modulated continuous-wave LiDAR, yet chip-scale sources rarely combine broad wavelength coverage, nanosecond switching, high spectral purity and stable high-power operation. Here we demonstrate a frequency-agile hybrid external-cavity laser enabled by the Pockels effect in thin-film lead zirconate titanate (PZT). The strong linear electro-optic response of PZT provides direct, non-thermal tuning of compact microring resonators with a wavelength-tuning efficiency of 17 pm/V. In contrast to conventional anisotropic Pockels materials, the near-isotropic in-plane electro-optic behaviour of thin-film PZT relaxes crystal-axis layout constraints, allowing efficient Vernier wavelength selection in compact ring cavities. The PZT resonators also show no measurable photorefractive resonance distortion and no resolvable DC-bias drift during operation, preserving stable wavelength-selective feedback. The demonstrated laser achieves an 82 nm tuning range, a 5 mW fiber-coupled output power, a side-mode suppression ratio (SMSR) exceeding 56.7 dB, and a wavelength-switching time of 5.5 ns. These results establish thin-film PZT photonics as a powerful electro-optic platform for compact, high-power, and frequency-agile integrated laser sources.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
