Open AccessAn SOI based polarization insensitive filter for all-optical clock recovery
Author(s) -
Jinghui Zou,
Yu Yu,
Weili Yang,
Zhao Wu,
Mengyuan Ye,
Guanyu Chen,
Lei Liu,
Shuanghui Deng,
Chi Zhang
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.006647
Subject(s) - optics , fiber bragg grating , silicon on insulator , polarization (electrochemistry) , grating , jitter , resonator , clock recovery , materials science , optoelectronics , optical filter , optical amplifier , diffraction grating , physics , clock signal , optical fiber , silicon , laser , computer science , telecommunications , chemistry
We fabricate and demonstrate a compact polarization insensitive filter for all-optical clock recovery (CR) based on silicon-on-insulator (SOI), which consists of a microring resonator (MRR) and two modified two-dimensional (2D) grating couplers. The distributed Bragg reflectors (DBRs) are introduced to improve the coupling efficiency of the 2D grating coupler. The MRR works as a comb filter for CR, while the 2D grating couplers serve as the polarization diversity unit to achieve a polarization insensitive operation. A subsequent semiconductor optical amplifier (SOA) performs the amplitude equalization. Based on this scheme, a good clock signal with 970 fs timing jitter can be achieved at 44 Gb/s from input signals with arbitrary polarization states.