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- W3150225944 abstract "Strained, self-aligned, and self-isolated V-groove lasers, operating near 980 nm with a minimum threshold current of 203 pA, have been fabricated using molecular-beam epitaxy. The structures nominally employ Gaa.8Ino.2As as the active gain medium. The lasing wavelength is a function of operating current and varies by a few nm. The far-field patterns are nearly circular. The characteristic temperature of the lasers is =184 K and under application of external uniaxial stress from compressive to tensile conditions, the threshold current increases monotonically. Transmission electron microscopy reveals increase in well-width at bottom of grooves and decrease along the walls. The low threshold current, lowest reported to date for a semiconductor laser, with or without the use of high reflectivity mirrors, and the other observations, are consistent with effects of single dimensionality due to confinement, effects of strain, and a reduction in parasitic recombination and leakage current. The optical power per facet is approximately 10 pW and the 3-dB small-signal modulation frequency is below 10 GHz. The latter, lower than that of strained ridge laser structures, is believed to be dominated by capture and transmission-line effects." @default.
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- W3150225944 date "1992-01-01" @default.
- W3150225944 modified "2023-09-24" @default.
- W3150225944 title "203 FA Threshold Current Strained V-Groove Lasers" @default.
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