Characteristics of Subcarrier Modulation and Its Application in WDM-PONs

Author

Xu, Zhaowen ; Wen, Yang Jing ; Zhong, Wen-De ; Cheng, Tee Hiang ; Attygalle, Manik ; Cheng, Xiaofei ; Yeo, Yong-Kee ; Wang, Yixin ; Chao Lu

Author_Institution

Nanyang Technol. Univ., Singapore, Singapore

Volume

27

Issue

12

fYear

2009

fDate

6/15/2009 12:00:00 AM

Firstpage

2069

Lastpage

2076

Abstract

We mathematically analyze and experimentally investigate the characteristics of subcarrier-modulated (SCM) light. Our investigation shows that the baseband data are also carried on the optical carrier after subcarrier modulation. This residual data introduce crosstalk when the optical carrier is separated from subcarriers and reused for uplink data modulation. The influence of the residual data carried on the optical carrier is studied in three kinds of upstream transmissions based on wavelength-seeded reflective semiconductor optical amplifiers (RSOAs) for carrier-reuse wavelength-division-multiplexed-passive optical networks (WDM-PONs). Results show that the crosstalk can be significantly suppressed with proper selection of the seeding power and operation conditions of downlink Mach-Zehnder modulator (MZM), including driving voltage and bias voltage.

Keywords

optical crosstalk; optical fibre networks; optical modulation; semiconductor optical amplifiers; subcarrier multiplexing; wavelength division multiplexing; Mach-Zehnder modulator; SCM light; WDM-PON; carrier-reuse wavelength-division-multiplexing; optical carrier; optical crosstalk; passive optical network; reflective semiconductor optical amplifiers; subcarrier modulation; uplink data modulation; wavelength-seeded RSOA; Downstream carrier reusing; passive optical network (PON); reflective semiconductor optical amplifier (RSOA); subcarrier modulation (SCM); wavelength-division multiplexing (WDM);

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2008.2006694

Filename

4815478