Title :
Emission Directionality of Semiconductor Ring Lasers: A Traveling-Wave Description
Author :
Javaloyes, Julien ; Balle, Salvador
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Glasgow, Glasgow
fDate :
5/1/2009 12:00:00 AM
Abstract :
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.
Keywords :
carrier density; laser beams; laser cavity resonators; optical hole burning; optical losses; optical modulation; ring lasers; semiconductor lasers; carrier density; cavity loss modulation; emission directionality; gain spectrum; light extraction section; semiconductor ring laser; spatial hole burning; thermal shift; traveling-wave description; Clocks; Couplers; Java; Laser feedback; Laser modes; Laser transitions; Optical coupling; Optical waveguides; Ring lasers; Semiconductor lasers; Coupled cavities; ring lasers; semiconductor lasers; thermal effects; traveling-wave modeling;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2009.2014079
