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Thermal management of VCSEL-based optoelectronic modules

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6 Author(s)
Yung-Cheng Lee ; Center for Optoelectron. Comput. Syst., Colorado Univ., Boulder, CO, USA ; S. E. Swirhun ; W. S. Fu ; T. M. Keyser
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Thermal management is critical to reliable optoelectronic modules based on vertical-cavity surface-emitting lasers (VCSELs). One critical thermal path to be managed is from a VCSEL to a case (heat sink), which is affected by packaging technologies and materials The measured VCSEL-to-case resistance of a laser with 8-μm aperture was 1650°C/W, and that of a 20-μm device was 1070°C/W. These thermal resistances are much larger than those for the edge-emitting lasers; advanced device and packaging technologies are being developed to reduce these resistances. To study the packaging effects, a three-dimensional (3-D) numerical model has been developed and calibrated by the measured data. The calibrated model was used to understand the difference in thermal behavior: 1) between a wire-bonded and a flip-chip VCSEL module, 2) between a single-VCSEL and an 8×8 VCSEL module, and 3) between a bottom-cooled and a top-cooled module

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IEEE Transactions on Components, Packaging, and Manufacturing Technology: Part B  (Volume:19 ,  Issue: 3 )