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- W3007431392 abstract "First, it has been made clear that the important parameters of the SE laser are its active layer thickness d and the mirror reflectivity R. The required values of three parameters such as threshold gain gth, threshold current density Jth, and differencial quantum efficiency ηd are obtained for d=2~3 µm and R=95%. At this condition gth is estimated as 300 cm-1 (Nth=3×1018 cm-3), Jth is 25~30 kA/cm2, and ηd is 40%. Next, in order to obtain a reflectivity as high as 95%, a TiO2/SiO2 multilayer Bragg reflector was introduced. It was found that a good quality TiO2 film could be evaporated by leaking oxygen through a variable leak valve to hold 1×10-4 Torr. Then, a 7-pair TiO2/SiO2 multilayer Bragg reflector was fabricated; its peak reflectivity was 95% at 8800 A. A room-temperature pulsed operation of a GaAlAs/GaAs SE layer was achieved and the minimum threshold current was reduced to as low as 150 mA when a round mesa was fabricated to 20 µm in diam." @default.
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- W3007431392 date "1986-01-01" @default.
- W3007431392 modified "2023-09-23" @default.
- W3007431392 title "GaAlAs/GaAs surface emitting laser with high-reflective TiO2/SiO2 multilayer Bragg reflector" @default.
- W3007431392 cites W2046390381 @default.
- W3007431392 doi "https://doi.org/10.1364/cleo.1986.thk11" @default.
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