능동 어레이 해석법에 의한 굴절율 도파 어레이의 방사빔 특성에 관한 연구 = Study on Far-Field Characteristics of Index-guided Laser Arrays by Active Array Analysis

다국어 초록 (Multilingual Abstract)

In this paper, the near-field intensity and phase profiles and the corresponding far-field intensity patterns of the lasing supermode at threshold for AlGaAs/GaAs index-guided laser arrays with three stripes have been calculated by active array analysis. In order to obtain a sing-lobe far-field an array with net-loss between channels should have a channel width w=3㎛, a channel spacing w＇=3㎛ and an effective refractive index step Δη=0.005. Both an array with w=4㎛, w＇=4㎛ and Δη=0.003 and an array with w=4.5㎛, w＇=3.5㎛ and Δη=0.005 have a twin-lobe far-field. But we can make these two arrays have a single-lobe far-field by increasing the thikness of a passive cladding layer to 1㎛.