Coherent light generators – Particular active media – Semiconductor
Patent
1994-12-27
1998-06-09
Bovernick, Rodney B.
Coherent light generators
Particular active media
Semiconductor
H01S 319
Patent
active
057646686
ABSTRACT:
To overcome the dilemma on device design in control of waveguide mode experienced in the conventional weak wave-guide-laser and SCH structure laser, realize higher output and lower dispersion of radiation beam, and improve the waveguide mode, on both sides of an active layer, carrier blocking layers for reducing the waveguide function of the active layer are provided, and waveguide layers are provided on both outer sides of the carrier blocking layers, and cladding layers are provided on both outer sides of the waveguide layers, the active layer is lamination of side barrier layers and a quantum well layer sandwiched therebetween, or side barrier layers, and a quantum well layer and a barrier layer sandwiched therebetween, the composition of the quantum well layer is Ga.sub.y In.sub.1-y As (0.6<y<1.0), and the carrier blocking layers are made of a material having a wider band gap and a lower refractive index than the material of the waveguide layers.
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Fujimoto Tsuyoshi
Ishizaka Shoji
Muro Kiyofumi
Yamada Yoshikazu
Bovernick Rodney B.
Mitsui Petrochemical Industries Ltd.
Song Yisun
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