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- W1602458797 abstract "Recently, it has been shown (Witjaksono and Botez, Appl. Phys. Lett., vol. 78, p. 4088, 2001) that DFB/DBR devices with central (grating) phase shift around /spl pi/ fundamentally favor lasing in an orthonormal, single-lobe beam pattern. Here, we present a study of the novel device's intermodal discrimination and efficiency as a function of the grating duty cycle; the optimization of the device for maximum efficiency; and the first experimental realization of a semiconductor grating incorporating a /spl pi/ phase shift. External differential quantum efficiencies as high as 62% can be obtained from devices with 22 cm/sup -1/ threshold gain." @default.
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- W1602458797 date "2002-11-13" @default.
- W1602458797 modified "2023-09-25" @default.
- W1602458797 title "High-efficiency, single-lobe surface-emitting DFB/DBR lasers" @default.
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- W1602458797 doi "https://doi.org/10.1109/leos.2001.969210" @default.
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