A reconfigurable multi-channel on-chip photonic filter for programmable optical frequency division

IF 6.6 2区 物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Simeng Zhu, Bocheng Yuan, Yizhe Fan, Mohanad Al-Rubaiee, Xiao Sun, Zhibo Li, Ahmet Seckin Hezarfen, Anthony E. Kelly, John H. Marsh, Lianping Hou
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Abstract

Recent advancements have broadened the application of photon filters based on Bragg gratings within optical communication networks and optical input/output interfaces. Traditional gratings, however, suffer from a fixed refractive index modulation distribution once manufactured, constraining their adaptability and flexibility. This study introduces a reconfigurable multi-channel photon filter on a silicon nitride on insulator platform. The filter incorporates an equivalent linearly chirped four-phase-shifted sampled Bragg grating with micro-heaters to enable thermo-optic tuning, facilitating programmable control over transmission spectral features. Experimental outcomes indicate the filter’s capability to seamlessly transition among single, dual, and quad-band configurations, as well as a band-stop mode, with independent tuning of each band. Moreover, optical frequency division multiplexing experiments using a 50 GHz semiconductor mode-locked laser have affirmed the filter’s tunability. In quad-band mode, band separations of 50, 100, and 150 GHz are achievable; in dual and single-band modes, band intervals extend from 150 to 250 GHz, allowing for precise single-wavelength selection. Featuring high tunability, minimal insertion losses, and superior signal side-mode suppression ratio, this filter structure supports the integration of programmable photonic devices into space optical communications, photonic integrated networks, and elastic optical networks.
用于可编程光分频的可重构多通道片上光子滤波器
近年来的进展扩大了基于布拉格光栅的光子滤波器在光通信网络和光输入/输出接口中的应用。然而,传统光栅的折射率调制分布是固定的,限制了其适应性和灵活性。介绍了一种基于绝缘体氮化硅平台的可重构多通道光子滤波器。该滤波器集成了一个等效线性啁啾的四相移采样布拉格光栅与微加热器,以实现热光调谐,便于可编程控制传输光谱特征。实验结果表明,该滤波器具有在单频段、双频段和四频段配置之间无缝转换的能力,以及带阻模式,每个频段都可以独立调谐。利用50 GHz半导体锁模激光器进行的光频分复用实验验证了该滤波器的可调性。在四频带模式下,可以实现50ghz、100ghz和150ghz的频带分离;在双频段和单频段模式中,频段间隔从150 GHz扩展到250 GHz,允许精确的单波长选择。该滤波器结构具有高可调性、最小的插入损耗和优越的信号侧模抑制比,支持可编程光子器件集成到空间光通信、光子集成网络和弹性光网络中。
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来源期刊
Nanophotonics
Nanophotonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
13.50
自引率
6.70%
发文量
358
审稿时长
7 weeks
期刊介绍: Nanophotonics, published in collaboration with Sciencewise, is a prestigious journal that showcases recent international research results, notable advancements in the field, and innovative applications. It is regarded as one of the leading publications in the realm of nanophotonics and encompasses a range of article types including research articles, selectively invited reviews, letters, and perspectives. The journal specifically delves into the study of photon interaction with nano-structures, such as carbon nano-tubes, nano metal particles, nano crystals, semiconductor nano dots, photonic crystals, tissue, and DNA. It offers comprehensive coverage of the most up-to-date discoveries, making it an essential resource for physicists, engineers, and material scientists.
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