Title: Design and analysis of surface emitting distributed feedback laser for radio over fiber (ROF)

Authors: Gunawan Witjaksono, Irma Saraswati

Addresses: MIMOS Berhad, Technology Park Malaysia, 5700 Kuala Lumpur, Malaysia; Electrical Engineering Department, Faculty of Engineering, University of Indonesia, Kampus UI Depok 16424, Indonesia. ' Faculty of Engineering, Universitas Sultan Ageng Tirtayasa, Jln. Raya Jakarta Km 4, Serang 42116, Banten, Indonesia

Abstract: This research is focused on design and analysis of semiconductor laser for ROF application. The alternative and advanced laser is designed for high performance operation and ease in manufacturing; that is a surface emitting distributed feedback (SEDFB) laser. Optimisation is performed at the wavelength of 1.55 µm using the horizontal-cavity structure. This device contains an active region by means of multi-quantum well (MQWs) structure and a separated confinement heterostructure (SCH) in order to optimise its performance. The simulation results in a ridge SEDFB structure producing a single-mode, 1550-nm output operation with optical confinement factor of 0.186, and far-field angle divergence of 450. The transverse edge loss is 0.031 cm−1. An optimum grating duty cycle is in the interval of 0.5-0.6, with a surface loss of 24cm−1. The resulting laser design has a single-lobe pattern with a differential quantum efficiency of 41.3%.

Keywords: distributed feedback lasers; surface-emitting semiconductor lasers; radio over fibre; ROF; confinement factor; near field; far field; optimisation; simulation; laser design; single-lobe pattern.

DOI: 10.1504/IJCNDS.2008.020714

International Journal of Communication Networks and Distributed Systems, 2008 Vol.1 No.3, pp.330 - 349

Published online: 12 Oct 2008 *

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