High quality long wavelength lasers grown by atmospheric pressure MOCVD with liquid group V sources

The authors have achieved low threshold In/sub x/Ga/sub 1-x/As/InP quantum well laser diodes, grown in a non-hydride metalorganic chemical vapor deposition system at atmospheric pressure using tertiarybutylarsine and tertiarybutylphosphine. Broad area laser diodes, emitting at 1.3 /spl mu/m, with a 1500 /spl Aring/ GaInAsP active region achieved threshold current densities of 1.25 kA/cm/sup 2/ for 400 micron cavity length. Strained and unstrained quantum wells with luminescence at 1.55 /spl mu/m have been incorporated into the active regions of laser diodes. Lattice matched In/sub 0.53/Ga/sub 0.47/As/InP single quantum well lasers exhibited extremely low threshold current densities of 220 A/cm/sup 2/ for broad area devices 3.5 mm in cavity length. Compressively strained 4 quantum wells devices displayed excellent threshold current densities of 300 A/cm/sup 2/ for 3 mm cavity lengths.<
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