Title :
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
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);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2006.884565
