Operating characteristics of single-quantum-well AlGaAs/GaAs high-power lasers
The operating characteristics of six types of graded-index separate confinement heterostructure single-quantum-well wide-stripe lasers grown by metalorganic chemical chemical vapor deposition are reported. The lasers exhibit intrinsic mode losses as low as 3 cm/sup -1/ and internal quantum efficiencies near unity. Measured differential gain coefficients range from 3.7 to 6.5 cm/A, and extrapolated transparency current densities range from 54 to 145 A/cm/sup 2/. These wide-stripe lasers are typically multilongitudinal mode and exhibit narrowing of the gain envelope and lateral far-field pattern as the cavity length increases. The high value of T/sub 0/ (>200 K) at long cavity lengths in conjunction with the low current density permits junction-side-up operation to CW optical powers of 0.5 - 0.7 W/facet, at which level catastrophic facet damage occurs on the uncoated devices. A maximum power conversion efficiency of 57 percent was measured on the laser structure exhibiting the lowest threshold current.
- Research Organization:
- Applied Solar Energy Corp., City of Industry, CA (US)
- OSTI ID:
- 6841863
- Journal Information:
- IEEE J. Quant. Electron.; (United States), Vol. 24:7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
SEMICONDUCTOR LASERS
QUANTUM MECHANICS
ALUMINIUM ARSENIDES
CHEMICAL VAPOR DEPOSITION
CRYSTAL GROWTH
GALLIUM ARSENIDES
LASER CAVITIES
PERFORMANCE
QUANTUM EFFICIENCY
ALUMINIUM COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
CHEMICAL COATING
DEPOSITION
EFFICIENCY
GALLIUM COMPOUNDS
LASERS
MECHANICS
PNICTIDES
SEMICONDUCTOR DEVICES
SURFACE COATING
420300* - Engineering- Lasers- (-1989)
657002 - Theoretical & Mathematical Physics- Classical & Quantum Mechanics