论文标题
基于薄膜锂Niobate中的动态调制，可见telecom宽带光学隔离器
Visible-telecom broadband optical isolator based on dynamic modulation in thin-film lithium niobate
论文作者
论文摘要
光学隔离器是光子系统的重要组成部分。由于严格的相匹配条件，谐振结构或材料吸收，当前的集成光学隔离器具有有限的带宽。在这里，我们演示了薄膜锂光子学中的超宽带集成的光学隔离器。我们在串联配置中使用动态站立波调制来打破洛伦兹的互惠并实现隔离。对于1550 nm的设计波长，我们测量15 dB的隔离比和插入损失低于0.5 dB。此外，我们通过实验表明，该隔离器可以在可见的和电信波长的情况下同时运行，并且性能可比性。在可见波长和电信波长可以同时实现隔离带宽〜100 nm。我们设备的较大带宽，高灵活性和实时可调性可以在集成的光子平台上实现新颖的非重点功能。
Optical isolators are an essential component of photonic systems. Current integrated optical isolators have limited bandwidths due to stringent phase-matching conditions, resonant structures, or material absorption. Here, we demonstrate an ultra-broadband integrated optical isolator in thin-film lithium niobate photonics. We use dynamic standing-wave modulation in a tandem configuration to break Lorentz reciprocity and achieve isolation. We measure an isolation ratio of 15 dB and insertion loss below 0.5 dB for a design wavelength of 1550 nm. In addition, we experimentally show that this isolator can simultaneously operate at visible and telecom wavelengths with comparable performance. Isolation bandwidths ~100 nm can be achieved simultaneously at both visible and telecom wavelengths. Our device's large bandwidth, high flexibility, and real-time tunability can enable novel non-reciprocal functionality on integrated photonic platforms.
