Ion-implanted planar-buried-heterostructure diode laser
First Claim
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1. A semiconductor laser device comprising:
- (a) an optical resonant cavity;
(b) a optical waveguide layer of a high refractive index;
(c) an upper optical waveguide cladding layer having a low refractive index and a first type of electrical conductivity, said upper cladding layer above said optical waveguide layer of high refractive index;
(d) a lower optical waveguide cladding layer having a low refractive index and a second type of electrical conductivity, said lower cladding layer below said optical waveguide layer of high refractive index;
(e) an active region coincident with said optical waveguide layer of high refractive index for conversion of injected current into light, said active region confined vertically by said lower and upper cladding layers;
(f) electrode means for applying current to said device; and
(g) reversed-biased junctions laterally adjacent to and in the plane of the active region for constraining current to flow through said active region.
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Abstract
A Planar-Buried-Heterostructure, Graded-Index, Separate-Confinement-Heterostructure semiconductor diode laser 10 includes a single quantum well or multi-quantum well active stripe 12 disposed between a p-type compositionally graded Group III-V cladding layer 14 and an n-type compositionally graded Group III-V cladding layer 16. The laser 10 includes an ion implanted n-type region 28 within the p-type cladding layer 14 and further includes an ion implanted p-type region 26 within the n-type cladding layer 16. The ion implanted regions are disposed for defining a lateral extent of the active stripe.
84 Citations
10 Claims
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1. A semiconductor laser device comprising:
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(a) an optical resonant cavity; (b) a optical waveguide layer of a high refractive index; (c) an upper optical waveguide cladding layer having a low refractive index and a first type of electrical conductivity, said upper cladding layer above said optical waveguide layer of high refractive index; (d) a lower optical waveguide cladding layer having a low refractive index and a second type of electrical conductivity, said lower cladding layer below said optical waveguide layer of high refractive index; (e) an active region coincident with said optical waveguide layer of high refractive index for conversion of injected current into light, said active region confined vertically by said lower and upper cladding layers; (f) electrode means for applying current to said device; and (g) reversed-biased junctions laterally adjacent to and in the plane of the active region for constraining current to flow through said active region. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In a Planar-Buried-Heterostructure, Graded-Index, Separate-Confinement-Heterostructure semiconductor diode laser, a multi-quantum well active stripe disposed between a p-type compositionally graded Group III-V cladding layer and an n-type compositionally graded Group III-V cladding layer, said laser including an ion implanted n-type region within said p-type cladding layer and further including an ion implanted p-type region within said n-type cladding layer, said regions being disposed for defining a lateral extent of said active stripe.
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8. In a semiconductor laser device, an arrangement comprising:
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(a) an active region; (b) electrode means for applying current to said device; (c) means for constraining current to flow through said active region, said means further comprising a first cladding layer of a first type of electrical conductivity and having a first impurity compensated region laterally adjacent to said active region, said first cladding layer disposed beneath said active region, and a second cladding layer of a second type of electrical conductivity and having a second impurity compensated region laterally adjacent to, said second cladding layer disposed above said active region. - View Dependent Claims (9, 10)
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Specification