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
Experimental Determination of the Temperature Distribution in Trench-Confined Oxide Vertical-Cavity Surface-Emitting Lasers / Dabbicco, M.; Spagnolo, V.; Ferrara, M.; Scamarcio, G.. - In: IEEE JOURNAL OF QUANTUM ELECTRONICS. - ISSN 0018-9197. - STAMPA. - 39:6(2003), pp. 701-707. [10.1109/JQE.2003.811600]
Experimental Determination of the Temperature Distribution in Trench-Confined Oxide Vertical-Cavity Surface-Emitting Lasers
Spagnolo, V.;
2003-01-01
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 methodI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.