Reduction of interchannel interference noise in a two-channel grating-based OCDMA system using a nonlinear optical loop mirror

被引：17

作者：

Lee, JH ^{[1
]}

Teh, PC ^{[1
]}

Petropoulos, P ^{[1
]}

Ibsen, M ^{[1
]}

Richardson, DJ ^{[1
]}

机构：

[1] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2001年 / 13卷 / 05期

关键词：

gratings; optical fiber communication; optical fiber devices; optical signal processing; optical switching;

D O I：

10.1109/68.920775

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We show that a nonlinear optical switch can be used to suppress the interchannel noise generated under multiuser operation within a coherent, direct-sequence optical code-division multiple-access (OCDMA) system. By incorporating a simple nonlinear optical loop mirror (NOLM) within the receiver, we demonstrate a 3.6-dB power penalty reduction in a two-channel 1.25-Gb/s 64-chip 160-Gchip/s grating-based direct-sequence OCDMA system. Even greater improvements in system performance were obtained at a data rate of 2.5 Gb/s, where the noise due to the overlap of adjacent decoded data bits also needs to be suppressed. In both instances, the system performance under two-channel operation with nonlinear filtering was shown to be comparable to that achieved under single-channel operation using the conventional matched-filter approach.

引用

页码：529 / 531

页数：3