Open AccessStudy of data format transform with optical waveguide resonators
Author(s) -
Libin Zhang,
Shaowu Chen,
Yonghao Fei,
T. Cao,
Cao Yan-Mei,
Xun Lei
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.194201
Subject(s) - resonator , waveform , coupling (piping) , optics , transfer function , signal (programming language) , fourier transform , pulse (music) , coupling coefficient of resonators , coupled mode theory , physics , modulation (music) , materials science , acoustics , computer science , refractive index , quantum mechanics , engineering , electrical engineering , voltage , detector , metallurgy , programming language
Based on the linear property of silicon microring resonators, we experimentally observed that such resonator can transform square-wave signal into pulse-wave signal, and the output waveform is strongly dependent on the input wavelength. We then proposed a mathematical model, which utilized linear coupling mode theory, Fourier transform and electro-optical Mach-Zehnder (MZ) intensity modulation functions. The numerical simulation results fit well with the experimental results. Besides, we gave a detailed explanation based on the transfer function of microrings. Furthermore, we have studied the case when the ring resonator is deviated from the critical coupling condition, and found that the coupling state, over coupling or under coupling, can be easily judged through the output waveform.