Performance Evaluation of Electroabsorption Modulators as Optical Transceivers in Radio-Over-Fiber Systems By FDTD Method

Author

Hur, Sub ; Nam, Seungki ; Lee, Hanlim ; Hwang, Seongtaek ; Oh, Yunje ; Jeong, Jichai

Author_Institution

Dept. of Radio Eng., Korea Univ., Seoul

Volume

24

Issue

12

fYear

2006

Firstpage

4953

Lastpage

4958

Abstract

In this paper, the limitations of the performance of electroabsorption modulators (EAMs) as optical transceivers in passive picocell systems by using the finite-difference time-domain (FDTD) method are theoretically investigated. EAMs with no bias voltage are modeled by the FDTD method with consideration of the interaction between electromagnetic fields and optical powers in optical waveguides. Transmission and responsivity of EAMs according to various optical input powers and chip lengths are calculated. Then, power margins of the downlink and uplink paths are estimated to define the service ranges of the passive picocell systems. In addition, EAMs with biased voltage are characterized for comparison. The results suggest that the service range of the passive picocell system using a no-biased EAM can be extended up to 20 m with a chip length of 400 mum and an optical input power larger than 10 dBm

Keywords

electro-optical modulation; electroabsorption; finite difference time-domain analysis; microwave photonics; optical communication equipment; radio-over-fibre; transceivers; 400 mum; EAM; FDTD method; electroabsorption modulator; finite-difference time domain method; optical transceivers; passive picocell systems; performance evaluation; power margins; radio-over-fiber systems; Electromagnetic fields; Electromagnetic modeling; Electromagnetic waveguides; Finite difference methods; Optical modulation; Optical waveguides; Power system modeling; Time domain analysis; Transceivers; Voltage; Electroabsorption modulator (EAM); finite-difference time domain (FDTD); microwave photonics; optical systems; radio-over-fiber (RoF);

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2006.884565

Filename

4063404