Multi-wavelength semiconductor comb lasers
First Claim
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1. A multi-wavelength semiconductor comb laser, comprising:
- a silicon-on-insulator (S01) substrate comprising a lower silicon layer, a buried silicon oxide layer (SiO2), and an upper silicon layer;
a waveguide included in the upper silicon layer of the SOI substrate;
a quantum dot (QD) active gain region above the SOI substrate defining an active section in a laser cavity of the comb laser; and
a dispersion tuning section to tune total cavity dispersion of the comb laser, the dispersion tuning section comprising a vertical slot waveguide, the vertical slot waveguide comprising a lower rail formed in the upper silicon layer of the SOI substrate having a plurality of widths along a length of the lower rail, a plurality of airgaps, a slot region formed in a dielectric layer above the lower rail, and an upper rail formed in a cladding layer above the dielectric layer,wherein the dispersion tuning section is configured to adjust one or more of;
a depth of one or more of the plurality of airgaps, one or more of the plurality of widths of the lower rail, a thickness of the dielectric layer, or a thickness of the cladding layer to tune total cavity dispersion of the comb laser, andwherein the dispersion tuning section is configured to enable tuning of total cavity dispersion of the comb laser for broad comb operation in a wavelength range of 1.3 μ
m to 1.6 μ
m.
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Abstract
Examples disclosed herein relate to multi-wavelength semiconductor comb lasers. In some examples disclosed herein, a multi-wavelength semiconductor comb laser may include a waveguide included in an upper silicon layer of a silicon-on-insulator (SOI) substrate. The comb laser may include a quantum dot (QD) active gain region above the SOI substrate defining an active section in a laser cavity of the comb laser and a dispersion tuning section included in the laser cavity to tune total cavity dispersion of the comb laser.
74 Citations
12 Claims
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1. A multi-wavelength semiconductor comb laser, comprising:
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a silicon-on-insulator (S01) substrate comprising a lower silicon layer, a buried silicon oxide layer (SiO2), and an upper silicon layer; a waveguide included in the upper silicon layer of the SOI substrate; a quantum dot (QD) active gain region above the SOI substrate defining an active section in a laser cavity of the comb laser; and a dispersion tuning section to tune total cavity dispersion of the comb laser, the dispersion tuning section comprising a vertical slot waveguide, the vertical slot waveguide comprising a lower rail formed in the upper silicon layer of the SOI substrate having a plurality of widths along a length of the lower rail, a plurality of airgaps, a slot region formed in a dielectric layer above the lower rail, and an upper rail formed in a cladding layer above the dielectric layer, wherein the dispersion tuning section is configured to adjust one or more of;
a depth of one or more of the plurality of airgaps, one or more of the plurality of widths of the lower rail, a thickness of the dielectric layer, or a thickness of the cladding layer to tune total cavity dispersion of the comb laser, andwherein the dispersion tuning section is configured to enable tuning of total cavity dispersion of the comb laser for broad comb operation in a wavelength range of 1.3 μ
m to 1.6 μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A multi-wavelength semiconductor comb laser, comprising:
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a waveguide included in an upper silicon layer of a silicon on insulator (S01) substrate, the SOI substrate comprising a lower silicon layer, a buried silicon oxide layer (SiO2), and the upper silicon layer; a first mirror and a second mirror at opposite ends of the comb laser defining a laser cavity along a length of the comb laser; a quantum dot (QD) III-V layer above the SOI substrate defining an active section in the laser cavity; and a dispersion tuning section included in the active section of the laser cavity to tune total cavity dispersion of the comb laser, the dispersion tuning section comprising a vertical slot waveguide, the vertical slot waveguide comprising a lower rail formed in the upper silicon layer of the SOI substrate having a plurality of widths along a length of the lower rail, a plurality of airgaps, a slot region formed in a dielectric layer above the lower rail, and an upper rail formed in a cladding layer above the dielectric layer, wherein the dispersion tuning section is configured to adjust one or more of;
a depth of one or more of the plurality of airgaps, one or more of the plurality of widths of the lower rail, a thickness of the dielectric layer, or a thickness of the cladding layer to tune total cavity dispersion of the comb laser, andwherein the dispersion tuning section is configured to enable tuning of total cavity dispersion of the comb laser for broad comb operation in a wavelength range of 1.3 μ
m to 1.6 μ
m. - View Dependent Claims (11, 12)
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Specification