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Emission Directionality of Semiconductor Ring Lasers: A Traveling-Wave Description

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2 Author(s)
Javaloyes, J. ; Dept. of Electron. & Electr. Eng., Univ. of Glasgow, Glasgow ; Balle, S.

We use a traveling-wave model for explaining the experimentally observed changes in the directionality of the emission of semiconductor ring lasers and its different behavior when current is increased or decreased. The modulation of the cavity losses imposed by the light extraction sections together with the thermal shift of the gain spectrum and spatial hole burning in the carrier density play a crucial role in the directionality of the emission and its changes with operation current. The differences as the current is increased or decreased correspond to the different role played by spatial hole burning.

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Quantum Electronics, IEEE Journal of  (Volume:45 ,  Issue: 5 )