240 Gb/s optical transmission based on an ultrafast silicon microring modulator  

作　　者：YUGUANG ZHANG HONGGUANG ZHANG JUNWEN ZHANG JIA LIU LEI WANG DAIGAO CHEN NAN CHI XI XIAO SHAOHUA YU 

机构地区：[1]State Key Laboratory of Optical Communication Technologies and Networks,China Information and Communication Technologies Group Corporation(CICT),Wuhan 430074,China [2]National Information Optoelectronics Innovation Center,Wuhan 430074,China [3]Key Laboratory of Information Science of Electromagnetic Waves(MoE),Fudan University,Shanghai 200433,China [4]Peng Cheng Laboratory,Shenzhen 518055,China

出　　处：《Photonics Research》2022年第4期1127-1133,共7页光子学研究（英文版）

基　　金：National Key Research and Development Program of China(2019YFB2205200);National Natural Science Foundation of China(U21A20454).

摘　　要：An ultrafast microring modulator(MRM) is fabricated and presented with V_(π)· L of 0.825 V · cm. A 240 Gb/s PAM-8 signal transmission over 2 km standard single-mode fiber(SSMF) is experimentally demonstrated. PN junction doping concentration is optimized, and the overall performance of the MRM is improved. Optical peaking is introduced to further extend the EO bandwidth from 52 to 110 GHz by detuning the input wavelength. A titanium nitride heater with 0.1 nm/m W tuning efficiency is implemented above the MRM to adjust the resonant wavelength. High bit rate modulations based on the high-performance and compact MRM are carried out. By adopting off-line signal processing in the transmitter and receiver side, 120 Gb/s NRZ, 220 Gb/s PAM-4, and240 Gb/s PAM-8 are measured with the back-to-back bit error ratio(BER) of 5.5 × 10^(-4), 1.5 × 10^(-2), and 1.4 × 10^(-2), respectively. A BER with different received optical power and 2 km SSMF transmission is also investigated. The BER for 220 Gb/s PAM-4 and 240 Gb/s PAM-8 after 2 km SSMF transmission is calculated to be 1.7 × 10^(-2), and 1.5 × 10^(-2), which meet with the threshold of soft-decision forward-error correction,respectively.

关 键 词：Gb/s MODULATOR MICRORING 

分 类 号：TN929.1[电子电信—通信与信息系统]