Finite Element Analysis Of Thermal Characteristics in Continuous Wave Long Wavelength Surface Emitting Lasers (I): Dielectric Cavity Structures |
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| Authors: | Toshihiko Baba Tomonobu Kondoh Fumio Koyama Kenichi Iga |
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| Institution: | (1) Division of Electrical and Computer Engineering, Yokohama National University, 156 Tokiwadai, Hodogaya-ku, Yokohama 240, Japan;(2) Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226, Japan |
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| Abstract: | We numerically analyzed the thermal characteristic in continuous wave (cw) GalnAsP/InP surface emitting lasers with dielectric multilayer mirrors by using finite element method. From the simulation of temperature distribution in cw devices, we found that MgO/Si multilayer mirror which has a high thermal conductivity is effective for heat sinking; the thermal resistance of device using MgO/Si mirror is nearly half of that using SiO2/Si one, almost independently of their thicknesses. It was also indicated that the optimum design for other structural parameters, especially the thickness of active region, is important to effectively suppress the temperature increase. The minimum threshold current was estimated to be 3 mA under cw condition for the active region diameter of 4 μm and thickness of 0.5 μm. |
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| Keywords: | surface emitting laser GalnAsP/InP thermal resistance finite element method MgO/Si SiO2/Si |
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