Calculated performances of 1.3-μm vertical-cavitysurface-emitting lasers on InGaAs ternary substrates |
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Authors: | Shoji H Otsubo K Fujii T Ishikawa H |
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Affiliation: | Fujitsu Labs. Ltd., Atsugi; |
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Abstract: | 1.3-μm vertical-cavity surface-emitting lasers (VCSEL's) on InGaAs ternary substrates are proposed and designed, It is shown that a deep potential well on the ternary substrate enlarges optical gain of a strained quantum well in the wavelength region of 1.3 μm. A higher reflectivity distributed Bragg reflector (DBR) is also obtained by the use of the ternary substrate because materials with a large refractive-index difference can be used for the DBR. Calculated threshold current density of 1.3-μm VCSEL's on the ternary substrates is much lower than those on the conventional InP substrates. The possibility of extremely low threshold current density below 200 A/cm 2 and temperature-insensitive operation are described |
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