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Low thermal resistance high-speed top-emitting 980-nm VCSELs

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6 Author(s)
Al-Omari, A.N. ; Electr. & Comput. Eng. Dept., Colorado State Univ., Fort Collins, CO ; Carey, G.P. ; Hallstein, S. ; Watson, J.P.
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Increasing copper plated heatsink radii from 0 to 4 mum greater than the mesa in vertical-cavity surface-emitting lasers (VCSELs) reduced the measured thermal resistance for a range of device sizes to values 50% lower than previously reported over a range of device sizes. For a 9-mum diameter oxide aperture, the larger heatsink increases output power and bandwidth by 131% and 40%, respectively. The lasers exhibit a 3-dB modulation frequency bandwidth up to 9.8 GHz at 10.5 kA/cm2. The functional dependence of thermal resistance on oxide aperture diameter indicates the importance of lateral heat flow to mesa sidewalls

Published in:

Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 11 )

Date of Publication:

June 2006

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