Low-threshold gain-guided coupled-stripe quantum well diode lasers by laser-assisted processing
Journal Article
·
· Appl. Phys. Lett.; (United States)
The first coupled-stripe laser diodes fabricated by a laser-assisted process are reported. In this process, a focused laser beam is scanned across AlGaAs-GaAs heterostructure material to pattern a shallow resistive region in the GaAs cap layer. In this manner, the distribution of the injected current is patterned to fabricate gain-guided four-stripe diode lasers. The devices operate continuously (cw) at room temperature with a low threshold current (36 mA) and high differential quantum efficiency (80%). A maximum cw power efficiency of 48% is obtained at 350 mA. The gain-guided structure favors the lower order array modes, thus the far-field pattern is dominated by a central lobe.
- Research Organization:
- Xerox Palo Alto Research Center, Palo Alto, California 94304
- OSTI ID:
- 6410718
- Journal Information:
- Appl. Phys. Lett.; (United States), Vol. 51:8
- Country of Publication:
- United States
- Language:
- English
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