160-GBaud DQPSK Optical Time-Division Demultiplexing Using a Polarization Modulator

Author

Ji, Yu ; Li, Yan ; Wu, Jian ; Luo, Binbin ; Dai, Yitang ; Xu, Kun ; Li, Wei ; Hong, Xiaobin ; Lin, Jintong

Author_Institution

State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China

Volume

24

Issue

9

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

772

Lastpage

774

Abstract

We propose and experimentally demonstrate a scheme for demultiplexing 160-GBaud differential quadrature phase shift keying optical time-division-multiplexing signals to 40-GBaud tributaries based on a polarization modulator (PolM) connected within a fiber loop. The PolM is used instead of a Mach-Zehnder modulator because the PolM reduces the insertion loss and is free from the bias drift problem since no DC bias is required. The generated optical gate is characterized with a pulsewidth of 5.4 ps, an extinction ratio larger than 15 dB, and a signal-to-noise ratio of over 28 dB at 40 GHz. Error-free performance is achieved with a power penalty of 1.8 dB in the worst case.

Keywords

Mach-Zehnder interferometers; modulators; quadrature phase shift keying; time division multiplexing; DQPSK optical time-division demultiplexing; Mach-Zehnder modulator; bias drift problem; differential quadrature phase shift keying; extinction ratio; fiber loop; frequency 40 GHz; optical gate; polarization modulator; power penalty; signal-to-noise ratio; Adaptive optics; Demultiplexing; Optical fibers; Optical modulation; Optical polarization; Demultiplexing; optical time-division multiplexing; polarization modulator;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2188282

Filename

6165332