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Proceedings Paper • Open Access

Web-based interactive educational software introducing semiconductor laser dynamics: Sound of Lasers (SOL)
Author(s): Antonio Consoli; Jorge Rodero Sanchez; Paloma R. Horche; Ignacio Esquivias

Paper Abstract

presented. The proposed tool is addressed to the students of optical communication courses, encouraging self consolidation of the subjects learned in lectures. The semiconductor laser model is based on the well known rate equations for the carrier density, photon density and optical phase. The direct modulation of the laser is considered with input parameters which can be selected by the user. Different options for the waveform, amplitude and frequency of the injected current are available, together with the bias point. Simulation results are plotted for carrier density and output power versus time. Instantaneous frequency variations of the laser output are numerically shifted to the audible frequency range and sent to the computer loudspeakers. This results in an intuitive description of the “chirp” phenomenon due to amplitude-phase coupling, typical of directly modulated semiconductor lasers. In this way, the student can actually listen to the time resolved spectral content of the laser output. By changing the laser parameters and/or the modulation parameters, consequent variation of the laser output can be appreciated in intuitive manner. The proposed educational tool has been previously implemented by the same authors with locally executable software. In the present manuscript, we extend our previous work to a web based platform, offering improved distribution and allowing its use to the wide audience of the web.

Paper Details

Date Published: 17 July 2014
PDF: 5 pages
Proc. SPIE 9289, 12th Education and Training in Optics and Photonics Conference, 92891S (17 July 2014); doi: 10.1117/12.2070560
Show Author Affiliations
Antonio Consoli, Univ. Politécnica de Madrid (Spain)
Jorge Rodero Sanchez, Univ. Politécnica de Madrid (Spain)
Paloma R. Horche, Univ. Politécnica de Madrid (Spain)
Ignacio Esquivias, Univ. Politécnica de Madrid (Spain)

Published in SPIE Proceedings Vol. 9289:
12th Education and Training in Optics and Photonics Conference
Manuel F. P. C. Martins Costa; Mourad Zghal, Editor(s)

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