Title :
Experimental determination of the temperature distribution in trench-confined oxide vertical-cavity surface-emitting lasers
Author :
Dabbicco, Maurizio ; Spagnolo, Vincenzo ; Ferrara, Michele ; Scamarcio, Gaetano
Author_Institution :
Dipt. Interuniversitario di Fisica, Univ. e Politecnico di Bari, Italy
fDate :
6/1/2003 12:00:00 AM
Abstract :
We measured the temperature profile of operating vertical-cavity surface-emitting lasers by means of a contactless optical micro-probe technique, based on the analysis of spectral features in the spontaneous electroluminescence escaping the top Bragg mirror. Increasing the injected current above threshold in the range of 4-10 mA leads to a progressively nonuniform and bell-shaped distribution of temperatures with the laser center ∼40% warmer than the edges. These results validate previous numerical calculations and show the usefulness of the proposed technique compared with the laser wavelength shift method.
Keywords :
electroluminescence; laser variables measurement; spectral methods of temperature measurement; spontaneous emission; surface emitting lasers; temperature distribution; 4 to 10 mA; contactless optical micro-probe technique; edges; injected current; laser center; nonuniform bell-shaped distribution; spectral features; spontaneous electroluminescence; temperature distribution; temperature profile; threshold; top Bragg mirror; trench-confined oxide vertical-cavity surface-emitting lasers; Laser modes; Microscopy; Mirrors; Optical arrays; Optical surface waves; Stimulated emission; Surface emitting lasers; Temperature distribution; Temperature measurement; Vertical cavity surface emitting lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2003.811600
