Modeling of light generation in planar waveguide dielectric lasers
Paweł Szczepański , Wiesław Woliński , Michał Malinowski
AbstractAn approximate model of light generation in planar waveguide dielectric lasers with Fabry-Perot as well as distributed feedback lasers is presented. In particular the threshold analysis based on the spectral shape of the emission and absorption cross-section of the active medium is developed, which allows us to predict the threshold gain as well as the oscillation wavelength. Moreover, an approximate expression relating the small signal gain to the output power and characteristic parameters of the laser system is derived. It is used for design optimal planar laser structure (i.e., to calculate optical feedback and optimal thin film thickness) providing the maximal power efficiency. Also the dynamic behavior of the planar waveguide laser is discussed. Especially, the influence of the real system parameters on the relaxation oscillations and modulation bandwidth is analyzed. It is shown that the compromise between the optimal power efficiency and maximal modulation bandwidth is required. Furthermore the statistical properties of the generated light are investigated. In particular the effect of the characteristic parameters of the laser structure on the mean laser intensity, variation of the intensity fluctuation and correlation functions of the mode amplitude (which determines laser linewidth), and of the mode intensity fluctuation.
|Corporate author||Institute of Microelectronics and Optoelectronisc (IMiO)|
|Book||Woliński Wiesław, Malinowski Michał (eds.): Proceedings of SPIE Laser Technology V: Physics and Research and Development Trends, vol. 3186, 1997, P.O. Box 10, Bellingham, Washington 98227-0010 USA, SPIE, ISBN 9780819426024, 448 p.|
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