Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2007-05-15
2007-05-15
Rodriguez, Armando (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S045010, C372S050100
Reexamination Certificate
active
10918358
ABSTRACT:
A semiconductor laser device according to the present invention comprises an optical waveguide laminated structure having: a first first-cladding layer made up of a p-InP layer; a double heterojunction layer of p-AlGaInAs; a second first-cladding layer made up of a p-InP layer; a first light confining layer of p-InGaAsP; an active layer of InGaAsP having a quantum well structure; a second light confining layer of n-InGaAsP; and a second-cladding layer made up of an n-InP layer, and heterojunctions of the second kind are formed at the interfaces between the first first-cladding layer and the double heterojunction layer and between the double heterojunction layer and the second first-cladding layer.
REFERENCES:
patent: 6974974 (2005-12-01), Sato et al.
patent: 2001-320125 (2001-11-01), None
McDermott Will & Emery LLP
Rodriguez Armando
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