title: An SOI based polarization insensitive filter for all-optical clock recovery.
abstract: 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.
authors.forename: Jinghui
authors.initials: J
authors.lastname: Zou
authors.forename: Yu
authors.initials: Y
authors.lastname: Yu
authors.forename: Weili
authors.initials: W
authors.lastname: Yang
authors.forename: Zhao
authors.initials: Z
authors.lastname: Wu
authors.forename: Mengyuan
authors.initials: M
authors.lastname: Ye
authors.forename: Guanyu
authors.initials: G
authors.lastname: Chen
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.forename: Shupeng
authors.initials: S
authors.lastname: Deng
authors.forename: Xinliang
authors.initials: X
authors.lastname: Zhang