All-optical switching and passive mode-locking based on non-linear polarization rotation in a semiconductor quantum well amplifier |
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| Authors: | C. C. Yang Choong-Wen Lay Ming-Shan Lin Ding-Wei Huang |
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| Affiliation: | (1) Institute of Electro-Optical Engineering, National Taiwan University, Taipei, Taiwan, People's Republic of China;(2) Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan, People's Republic of China |
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| Abstract: | ![]()
Owing to differences in the selection rules of electron transitions between TE and TM modes in a quantum well structure, and optical amplifier with such a structure manifests linear birefringence and anisotropy of gain-absorption saturation. The anisotropy leads to the evolution of power-dependent polarization in the optical amplifier. We demonstrate experimentally efficient non-linear self-switching based on this phenomenon in an InGaAs/GaAs single quantum well amplifier. Also, by utilizing the non-linear polarization evolution, we show numerically passive mode-locking of a semiconductor laser with a ring cavity. |
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