Semiconductor amplifier or laser having integrated lens
First Claim
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1. An optical device comprising:
- a semiconductor optical amplifier; and
a lens for receiving optical energy from the optical amplifier, said lens and said optical amplifier being monolithically integrated on a common substrate, said lens having a focal point located within said common substrate.
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Abstract
An optical device includes a semiconductor optical amplifier and a lens for receiving optical energy from the optical amplifier. The lens and the optical amplifier are monolithically integrated on a common substrate. The optical amplifier may be of the type having a tapered active region. Rather than an optical amplifier, a semiconductor laser may be integrated with the lens. The lens may be formed by changing the refractive index of the waveguide core which is formed in the semiconductor material. This refractive index change may be produced by changing the thickness of a portion of the waveguide core layer.
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Citations
18 Claims
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1. An optical device comprising:
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a semiconductor optical amplifier; and a lens for receiving optical energy from the optical amplifier, said lens and said optical amplifier being monolithically integrated on a common substrate, said lens having a focal point located within said common substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A monolithic semiconductor structure comprising:
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a substrate defining an amplifying section and a passive waveguiding section; a bottom cladding layer, a core layer and a top cladding layer all formed from semiconductor materials and disposed on said amplifying section and said passive waveguiding section of the substrate, the portion of the core layer in the amplifying section including a semiconductor material for supplying gain to an optical signal and the portion of the core layer in the passive waveguiding section forming a passive waveguide layer that does not supply gain; and a lens having a prescribed shape and integrated on said substrate at a location such that optical energy propagating in the core layer passes through said lens, said lens having a focal point located within said structure. - View Dependent Claims (12, 13)
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14. An optical device comprising:
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a semiconductor laser; and a lens for receiving optical energy from the laser, said lens and said laser being monolithically integrated on a common substrate, said lens having a focal point located within said device. - View Dependent Claims (15, 16, 17, 18)
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Specification