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Mode-locking by nonlinear polarization rotation in a semiconductor optical amplifier

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7 Author(s)
Zhonggui Li ; Eindhoven Univ. of Technol., Netherlands ; Xuelin Yang ; E. Tangdiongga ; Heongkyu-Ju
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This paper numerically investigates a passive mode-locking system based on nonlinear polarization rotation in a semiconductor optical amplifier (SOA). The principle of polarization-dependent gain saturation induced by the high-intensity part of the optical pulse in a SOA makes it possible to reshape the pulse in such a way that the low-intensity part is cut away. This will result in pulse narrowing and, when realized in a loop with sufficiently high gain, will lead to mode locking. The reshaping is realized by simple polarization controlling elements. Extensive numerical simulations have been done for commercially available SOA with a consistent pulse propagation model.

Published in:

EQEC '05. European Quantum Electronics Conference, 2005.

Date of Conference:

12-17 June 2005