Analysis of Thermal Properties of 940-nm Vertical Cavity Surface Emitting Laser Arrays

The output characteristics of vertical cavity surface emitting lasers (VCSELs) arrays are largely influenced by temperature. We systematically studied thermal properties in 20-element oxide-confined VCSEL arrays via both theory and experiment. The output power, conversion efficiency, and threshold current dependent on ambient temperatures were measured. According to the relationship of wavelength shift and dissipated power, the device thermal resistance dependent on ambient temperature was obtained. The actual temperature in active region was successfully extracted. A 3-D heat diffusion model was established to simulate temperature distribution accurately.

Automated summary

The output characteristics of vertical cavity surface emitting lasers arrays are influenced by temperature, and thermal properties were systematically studied in a 20-element oxide-confined VCSEL arrays through theory and experiment. Output power, conversion efficiency, and threshold current were measured depending on ambient temperatures. The relationship between wavelength shift, dissipated power, and device thermal resistance depending on ambient temperature was obtained, with the actual temperature in the active region successfully extracted. A 3-D heat diffusion model was established for accurate simulation of temperature distribution.