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US 2006/0215720 A1Published application
Quantum cascade laser with grating formed by a periodic variation in doping
OwnerScott Corzine, David Bour +1inventors
InventorsScott Corzine, David Bour, Gloria Hofler
Life of this patent
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Abstract
Doped diffraction gratings for use in quantum cascade lasers and mid-infrared wavelength vertical cavity surface emitting lasers can be made by introducing periodic variations in the doping levels that result in periodic refractive index variations. Doping is typically accomplished by use of an n type dopant.
Claims22
An edge emitting semiconductor laser comprising:
- a waveguide layer comprising a cladding layer and a waveguide core;
- and
- a distributed Bragg reflector positioned in said waveguide layer to control an emission wavelength, said distributed Bragg reflector comprised of a plurality of mirror pairs wherein a first member of said mirror pair differs from a second member of said mirror pair by a higher doping level to produce a difference of refractive index.
A vertical cavity surface emitting laser comprising:
- an active region;
- and
- a distributed Bragg reflector positioned on one side of said active region to control an emission wavelength, said distributed Bragg reflector comprised of a plurality of mirror pairs wherein a first member of said mirror pair differs from a second member of said mirror pair by a higher doping level to produce a difference of refractive index.
A method for an edge emitting semiconductor laser comprising:
- providing a waveguide layer;
- and
- providing a distributed Bragg reflector positioned in said waveguide layer to control an emission wavelength, said distributed Bragg reflector comprised of a plurality of mirror pairs wherein a first member of said mirror pair differs from a second member of said mirror pair by a higher doping level to produce a difference of refractive index.
A method for a vertical cavity surface emitting laser comprising:
- providing an active region;
- and
- placing a distributed Bragg reflector positioned on one side of said active region to control an emission wavelength, said distributed Bragg reflector comprised of a plurality of mirror pairs wherein a first member of said mirror pair differs from a second member of said mirror pair by a higher doping level to produce a difference of refractive index.
Dependencies are inferred from the claim text.