Method and system for hybrid integration of a tunable laser
First Claim
1. A tunable laser comprising:
- a substrate comprising a silicon material and a recess region having an interface;
a gain medium coupled to the substrate and having a facet spatially separated from the interface by an index matching region, wherein the gain medium includes a compound semiconductor material;
a waveguide disposed in the substrate and optically coupled to the gain medium;
a first wavelength selective element characterized by a first reflectance spectrum and disposed in the substrate, wherein the first wavelength selective element comprises a first modulated grating reflector comprising a superstructure grating characterized by a first wavelength spacing between modes;
a second wavelength selective element characterized by a second reflectance spectrum and disposed in the substrate, wherein the second wavelength selective element comprises a second modulated grating reflector;
an optical coupler disposed in the substrate and joining the first wavelength selective element, the second wavelength selective element, and a phase adjustment section disposed in the silicon material substrate between the waveguide and the optical coupler, the phase adjustment section having a heating element; and
an output mirror.
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Accused Products
Abstract
A tunable laser includes a substrate comprising a silicon material and a gain medium coupled to the substrate. The gain medium includes a compound semiconductor material. The tunable laser also includes a waveguide disposed in the substrate and optically coupled to the gain medium, a first wavelength selective element characterized by a first reflectance spectrum and disposed in the substrate, and a second wavelength selective element characterized by a second reflectance spectrum and disposed in the substrate. The tunable laser further includes an optical coupler disposed in the substrate and joining the first wavelength selective element, the second wavelength selective element, and the waveguide and an output mirror.
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Citations
19 Claims
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1. A tunable laser comprising:
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a substrate comprising a silicon material and a recess region having an interface; a gain medium coupled to the substrate and having a facet spatially separated from the interface by an index matching region, wherein the gain medium includes a compound semiconductor material; a waveguide disposed in the substrate and optically coupled to the gain medium; a first wavelength selective element characterized by a first reflectance spectrum and disposed in the substrate, wherein the first wavelength selective element comprises a first modulated grating reflector comprising a superstructure grating characterized by a first wavelength spacing between modes; a second wavelength selective element characterized by a second reflectance spectrum and disposed in the substrate, wherein the second wavelength selective element comprises a second modulated grating reflector; an optical coupler disposed in the substrate and joining the first wavelength selective element, the second wavelength selective element, and a phase adjustment section disposed in the silicon material substrate between the waveguide and the optical coupler, the phase adjustment section having a heating element; and an output mirror. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of operating a tunable laser, the method comprising:
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tuning, using a first resistive thermal device, a first modulated grating reflector, wherein the first modulated grating reflector is characterized by a first reflectance spectra including a first plurality of reflectance peaks; tuning, using a second resistive thermal device, a second modulated grating reflector, wherein the second modulated grating reflector is characterized by a second reflectance spectra including a second plurality of reflectance peaks; generating optical emission from a gain medium comprising a compound semiconductor material; adjusting a phase of the optical emission from the gain medium through a phase adjustment section integrated in a silicon layer using a heating element; waveguiding the phase adjusted optical emission to pass through an optical waveguide in the silicon layer to an optical coupler; reflecting a portion of the optical emission having a spectral bandwidth defined by an overlap of one of the first plurality of reflectance peaks and one of the second plurality of reflectance peaks; transmitting the portion of the optical emission through an index matching region disposed between the optical waveguide in the silicon layer and the gain medium; amplifying the portion of the optical emission in the gain medium; and transmitting a portion of the amplified optical emission through an output mirror. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification