Optoelectronic device
First Claim
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1. A detector remodulator comprising:
- a silicon on insulator (SOI) chip having a silicon substrate, an insulator layer and a topmost silicon layer;
a detector coupled to a first input waveguide;
a modulator, coupled to a second input waveguide and an output waveguide; and
an electrical circuit connecting the detector to the modulator;
wherein the modulator includes a waveguide including;
a modulation region at which a semiconductor junction is set across the waveguide of the modulator, the junction comprising a first doped region and a second doped region;
wherein;
the electrical circuit is connected to a first electrical pad on a first side of the modulation region, the first electrical pad forming a contact directly to the first doped region,the electrical circuit is connected to a second electrical pad on a second side of the modulation region, the second electrical pad forming a contact directly to the second doped region, andthe electrical circuit comprises a signal path from the detector to the modulator, the signal path having a portion in an integrated circuit; and
whereinthe modulator is located at a portion of the SOI chip at which the topmost silicon layer and the insulator of the silicon on insulator chip have been replaced by a cladding layer on top of the substrate;
the modulation region of the modulator comprising an optically active region, above the cladding layer;
wherein the cladding layer has a refractive index which is less than a refractive index of the optically active region, such that an optical mode of the modulator is confined to the optically active region.
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Abstract
An optoelectronic device and method of making the same. The device comprising: a substrate; an epitaxial crystalline cladding layer, on top of the substrate; and an optically active region, above the epitaxial crystalline cladding layer; wherein the epitaxial crystalline cladding layer has a refractive index which is less than a refractive index of the optically active region, such that the optical power of the optoelectronic device is confined to the optically active region.
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Citations
16 Claims
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1. A detector remodulator comprising:
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a silicon on insulator (SOI) chip having a silicon substrate, an insulator layer and a topmost silicon layer; a detector coupled to a first input waveguide; a modulator, coupled to a second input waveguide and an output waveguide; and an electrical circuit connecting the detector to the modulator; wherein the modulator includes a waveguide including; a modulation region at which a semiconductor junction is set across the waveguide of the modulator, the junction comprising a first doped region and a second doped region; wherein; the electrical circuit is connected to a first electrical pad on a first side of the modulation region, the first electrical pad forming a contact directly to the first doped region, the electrical circuit is connected to a second electrical pad on a second side of the modulation region, the second electrical pad forming a contact directly to the second doped region, and the electrical circuit comprises a signal path from the detector to the modulator, the signal path having a portion in an integrated circuit; and
whereinthe modulator is located at a portion of the SOI chip at which the topmost silicon layer and the insulator of the silicon on insulator chip have been replaced by a cladding layer on top of the substrate;
the modulation region of the modulator comprising an optically active region, above the cladding layer;
wherein the cladding layer has a refractive index which is less than a refractive index of the optically active region, such that an optical mode of the modulator is confined to the optically active region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A detector remodulator comprising:
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a silicon on insulator (SOI) chip having a silicon substrate, an insulator layer and a topmost silicon layer; a detector coupled to a first input waveguide; a modulator, coupled to a second input waveguide and an output waveguide; and an electrical circuit connecting the detector to the modulator; wherein the modulator includes a waveguide including; a modulation region at which a semiconductor junction is set across the waveguide of the modulator, the junction comprising a first doped region and a second doped region; wherein; the electrical circuit is connected to a first electrical pad on a first side of the modulation region, the first electrical pad forming a contact directly to the first doped region, the electrical circuit is connected to a second electrical pad on a second side of the modulation region, the second electrical pad forming a contact directly to the second doped region, and the electrical circuit comprises a signal path from the detector to the modulator, the signal path having a portion in an integrated circuit; and
whereinthe detector is located at a portion of the SOI chip at which the topmost silicon layer and the insulator of the silicon on insulator chip have been replaced by a cladding layer on top of the substrate;
the detector comprising an optically active region above the cladding layer;
wherein the cladding layer has a refractive index which is less than a refractive index of the optically active region, such that an optical mode of the detector is confined to the optically active region. - View Dependent Claims (14, 15, 16)
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Specification