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 μm and an optical input power larger than 10 dBm.

© 2006 IEEE

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Electron. Lett. (2)

D. Wake, D. Johansson, D. G. Moodie, "Passive picocell: A new concept in wireless network infrastructure," Electron. Lett. 33, 404-405 (1997).

A. J. Motley, J. M. P. Keenan, "Personal communication radio coverage in buildings at 900 MHz and 1700 MHz," Electron. Lett. 24, 763-764 (1988).

IEEE J. Quantum Electron. (2)

J. Buus, "The effective index method and its application to semiconductor lasers," IEEE J. Quantum Electron. QE-18, 1083-1089 (1982).

Y. Kim, H. Lee, J. Lee, J. Han, T. W. Oh, J. Jeong, "Chirp characteristics of 10-Gb/s electro-absorption modulator integrated DFB lasers," IEEE J. Quantum Electron. 36, 900-908 (2000).

IEEE J. Sel. Topics Quantum Electron. (1)

S. Nam, Y. Kim, J. Lee, M. Kim, J. Jeong, "Performance of traveling-wave electroabsorption modulators depending on microwave properties of waveguides calculated using the FDTD method," IEEE J. Sel. Topics Quantum Electron. 9, 763-769 (2003).

J. Lightw. Technol. (1)

D. G. Moodie, M. J. Harlow, M. J. Guy, S. D. Perrin, C. W. Ford, M. J. Robertson, "Discrete electroabsorption modulators with enhanced modulation depth," J. Lightw. Technol. 14, 2035-2043 (1996).

Other (6)

A. Taflove, Computational Electrodynamic: The Finite-Difference Time-Domain Method (Artech House, 1995).

S. Hur, H. Jang, Y. Kim, S. Nam, J. Jeong, "Transmission characteristics of passive pico-cell systems with radio-over-fiber technique using an electroabsorption modulator," Proc. Opto-Electron. and Commun. Conf. (2005) pp. 786-787.

Q. Xin, P. Hartmann, A. Wonfor, J. D. Ingham, R. V. Penty, I. H White, "Microwave signal transmission over a directly-modulated radio-over-fiber link using cascaded semiconductor optical amplifiers," Optical Fiber Communication Conf. (2005) pp. 77-82.

C. K Sim, M. L. Yee, B. Luo, L. C. Ong, M. Y. W. Chia, "Performance evaluation for wireless LAN, Ethernet and UWB co-existence on hybrid radio-over-fiber picocells," Proc. Optical Fiber Communication Conf. (2005) pp. 534-536.

T. Niiho, M. Nakaso, K. Masuda, H. Sasai, K. Utsumi, M. Fuse, "Multi-channel wireless LAN distributed antenna system based on radio-over-fiber techniques," Proc. Annu. Meeting IEEE LEOS (2004) pp. 57-58.

M. Maeda, T. Nakatogawa, K. Oyamada, "Optical fiber transmission technology for terrestrial digital broadcasting signals in Japan," Proc. Meeting Microw. Photon. (2004) pp. 177-180.

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