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Static and dynamic analysis of tunable two-section high-speed distributed feedback laser utilizing the gain lever effect

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2 Author(s)
Griffel, G. ; Polytechnic Univ., Brooklyn, NY, USA ; Chih-Hsiao Chen

Analysis of a novel semiconductor laser structure designed for obtaining wide tuning range along with high speed modulation response is presented. The laser consists of a composite cavity structure with two active (gain) sections. One of the sections has a grating corrugation while the other is flat. A detailed round-trip analysis is combined with the rate equations, which include sublinear gain/carrier relation, to perform steady-state and small-signal analysis. It is shown that the biasing (dc) condition of the different sections plays a critical role in the determination of the dynamic response of the device. In addition, we show that the gain-lever effect can be utilized for a considerable enhancement of the frequency modulation (FM) response. Other critical structural parameters such as the grating coupling coefficient and device geometry are discussed

Published in:

Quantum Electronics, IEEE Journal of  (Volume:32 ,  Issue: 1 )

Date of Publication:

Jan 1996

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