The spatiotemporal modeling of oxide-confined Vertical-Cavity Surface-Emitting Lasers

• Main Author: 羅俊麟
• Other Authors: 郭浩中
• Format: Others
• Language: en_US
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/84755940839138895249

碩士 === 國立交通大學 === 電機資訊學院碩士在職專班 === 92 === The spatiotemporal simulation for weakly index-guided vertical-cavity surface-emitting lasers ( VCSELs ) are presented in this work. A three dimensional model (2 dimension in space domain and 1 dimension in time domain) is proposed based on physical and geometrical properties of oxide confined VCSELs. By solving carrier and photon rate equations numerically with thermal effect, current leakage effect, current spreading effect and carrier diffusion effect, we demonstrated the simulation capability including the multimode transient response of output power, light-current (LI) characteristics, optical mode competition, spatial hole burning (SHB), and small-signal modulation of VCSELs. The influence of spreading current was found to be more dominative over carrier diffusion on dynamic response while the carrier transport is neglected. A higher bandwidth and better low frequency response are obtained under low current spreading condition that increases the current concentrated in the core region of the active layer results in low threshold current. Design and fabrication of VCSELs, is expensive, time-consuming, and needs iterative process. This simulation tool provides an accurate and efficient device modeling, and can help on shortening the design cycle, and speed up the development process.