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Dynamics of Broad-Area Semiconductor Lasers With Short Optical Feedback

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4 Author(s)
Tachikawa, T. ; Fac. of Eng., Shizuoka Univ., Shizuoka, Japan ; Takimoto, S. ; Shogenji, R. ; Ohtsubo, J.

The dynamics of filamentations in broad-area semiconductor lasers with short optical feedback were numerically studied. Regular pulse packages similar to those observed in narrow-stripe edge-emitting semiconductor lasers were found as the feedback reflectivity is increased. However, the regular pulse packages consisted of a periodic envelope of the external cavity frequency and fine pulse trains of periodic filaments, which is different from the regular pulse packages observed in narrow-stripe edge-emitting semiconductor lasers. From the analysis for spatio-temporal near-field patterns, we found periodic undulations of the spatial and temporal filament sizes as the external mirror reflectivity was changed. We also investigated filtered optical feedback, where a part of the emitted beam is fed back into the laser cavity. The time-averaged near-field pattern was found to have a strong dependence on the feedback level in the case of spatial filtered optical feedback.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:46 ,  Issue: 2 )

Date of Publication:

Feb. 2010

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