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Proceedings Paper

Radio-over-fiber transmission from an optically injected semiconductor laser in period-one state
Author(s): Sze-Chun Chan; Sheng-Kwang Hwang; Jia-Ming Liu
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Paper Abstract

Nonlinear dynamics of semiconductor lasers has found many interesting applications in microwave photonics technology. In particular, a semiconductor laser under optical injection of proper strength and optical frequency detuning can enter into the dynamical period-one (P1) state through Hopf bifurcation. The resulting optical output carries a broadly tunable high-speed microwave modulation without employing any expensive microwave electronics. It is therefore a desirable source for radio-over-fiber (RoF) applications. The P1 state can also be adjusted to have a nearly single sideband (SSB) optical spectrum. It is an advantageous property for long distance fiber transmission because it minimizes the microwave power penalty that is induced by chromatic dispersion. In this work, we investigate in detail the properties of the P1 state and the effect of fiber dispersion as a function of the injection conditions. Based on a well-established rate equation model, the results show that the generated microwave frequency can be several times higher than the intrinsic relaxation resonance frequency of the laser. With a large injection strength and an injection detuning frequency higher than that required for Hopf bifurcation, the generated microwave power is nearly constant and the optical spectrum is close to SSB. We simulate the effect of fiber chromatic dispersion and the result shows a maximum microwave power penalty of less than 2 dB. The characterization of the P1 state is useful in guiding the design of RoF systems based on optically injected semiconductor lasers.

Paper Details

Date Published: 7 February 2007
PDF: 8 pages
Proc. SPIE 6468, Physics and Simulation of Optoelectronic Devices XV, 646811 (7 February 2007); doi: 10.1117/12.699170
Show Author Affiliations
Sze-Chun Chan, Univ. of California/Los Angeles (United States)
Sheng-Kwang Hwang, National Chung Cheng Univ. (Taiwan)
Jia-Ming Liu, Univ. of California/Los Angeles (United States)

Published in SPIE Proceedings Vol. 6468:
Physics and Simulation of Optoelectronic Devices XV
Marek Osinski; Fritz Henneberger; Yasuhiko Arakawa, Editor(s)

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