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Widely Tunable Photonic Filter Based on Equivalent Chirped Four-Phase-Shifted Sampled Bragg Gratings
ACS Photonics ( IF 6.5 ) Pub Date : 2025-01-27 , DOI: 10.1021/acsphotonics.4c01899
Simeng Zhu, Bocheng Yuan, Mohanad Al-Rubaiee, Yiming Sun, Yizhe Fan, Ahmet Seckin Hezarfen, Stephen J. Sweeney, John H. Marsh, Lianping Hou

We have developed an integrated dual-band photonic filter (PF) utilizing equivalent chirped four-phase-shifted sidewall-sampled Bragg gratings (4PS-SBG) on a silicon-on-insulator platform. Using the reconstruction equivalent-chirp technique, we designed linearly chirped 4PS Bragg gratings with two π-phase shifts (π-PSs) positioned at 1/3 and 2/3 of the grating cavity, introducing two passbands in the + first order channel. Leveraging the significant thermo-optic effect of silicon, dual-band tuning is achieved through integrated microheaters (MHs) on the chip surface. By varying the injection currents from 0 to 85 mA into the MHs, the device demonstrates continuous and wide-range optical frequency division performance, with the frequency interval between the two passbands adjustable from 52.1 to 439.5 GHz. Four notable frequency division setups at 100, 200, 300, and 400 GHz were demonstrated using a 100 GHz, 1535 nm semiconductor passive mode-locked laser as the light source.

中文翻译:


基于等效啁啾四相移采样布拉格光栅的宽可调光子滤波器



我们开发了一种集成的双波段光子滤波器 (PF),在绝缘体上硅平台上利用等效的啁啾四相移侧壁采样布拉格光栅 (4PS-SBG)。使用重建等效啁啾技术,我们设计了线性啁啾 4PS 布拉格光栅,在光栅腔的 1/3 和 2/3 处有两个π相移 (π-PS),在 + 一阶通道中引入两个通带。利用硅的显著热光效应,通过芯片表面的集成微加热器 (MH) 实现双频调谐。通过将注入 MH 的注入电流从 0 更改为 85 mA,该器件展示了连续和宽范围的光分频性能,两个通带之间的频率间隔可在 52.1 至 439.5 GHz 范围内调节。使用 100 GHz、1535 nm 半导体无源锁模激光器作为光源,演示了 100 GHz 、 200 GHz 、 300 GHz 和 400 GHz 的四种值得注意的频分设置。
更新日期:2025-01-27
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