| Citation: |
Cao Yulian, Li Hui, He Guorong, Wang Xiaodong, Wang Qing, Wu Xuming, Song Guofeng, Chen Lianghui. Theoretical Optimization of an 808nm Large Optical CavityQuantum Well Laser[J]. Journal of Semiconductors, 2006, In Press.
Cao Y L, Li H, He G R, Wang X D, Wang Q, Wu X M, Song G F, Chen L H. Theoretical Optimization of an 808nm Large Optical CavityQuantum Well Laser[J]. Chin. J. Semicond., 2006, 27(12): 2173.
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Theoretical Optimization of an 808nm Large Optical CavityQuantum Well Laser
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Abstract
An optimized 808nm InGaAsP/InGaP/AlGaAs laser diode structure with a large optical cavity is analyzed.To achieve single-transverse mode lasing,the thickness of the cladding layers and cap layers are optimized to improve the modal discrimination.The optimal thicknesses are 0.8,0.6,and 0.11μm for the upper cladding layer,lower cladding layer,and cap layers,respectively.An ohmic contact layer with a high refractive index surrounded by the metal layer and cladding layer acts as a secondary waveguide.A leaky wave forms a parasitical mode in the secondary waveguide.The modal loss dependence on the cap thickness is periodic.The first resonance occurs when the cap thickness is λ1/4,and the interval between resonances is λ1/2,where λ1 is the perpendicular projected wavelength of the leaky wave for some mode. -
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