材料科学
硅光子学
带宽(计算)
光电子学
谐振器
绝缘体上的硅
相位调制
光子学
光学
光纤布拉格光栅
调制(音乐)
硅
物理
电信
计算机科学
相位噪声
波长
声学
作者
Omid Jafari,Wei Shi,Sophie LaRochelle
标识
DOI:10.1109/lpt.2020.2978793
摘要
We experimentally demonstrate a silicon photonic Mach-Zehnder modulator (MZM) assisted by phase-shifted Bragg gratings. Coupled resonators are inserted in the Bragg grating structure to significantly enhance the phase modulation efficiency, while maintaining a wide optical bandwidth compared to other resonator-based modulators. Fabricated using a CMOS-compatible foundry process, the device achieved a small-signal V π × L of 0.18 V.cm, which is seven times lower than a conventional silicon MZM fabricated with the same process. The device has a compact footprint, with a length of only 162 μm, and shows a modulation bandwidth of 28 GHz at a reverse bias of 1 V. Non-return-to-zero modulation is demonstrated at 30 Gb/s with a bit-error-rate (BER) below the 7%-overhead forward error correction (FEC) threshold over a bandwidth of 3.5 nm. This bandwidth should translate into an operating temperature range greater than 40 °C.
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