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公开(公告)号：US20250076727A1
公开(公告)日：2025-03-06
申请号：US18241193
申请日：2023-08-31
Applicant: Tin Komljenovic , Ali Eshaghian Dorche , Minh Tran
Inventor： Tin Komljenovic , Ali Eshaghian Dorche , Minh Tran
Abstract: A device has a dual-geometry waveguide structure with an input, an output and two coupler structures optically coupled using arms of different optical path lengths. Each arm has a first passive waveguide having a first length and a dual-core waveguide geometry, coupled by a transition structure to a second passive waveguide having a second length and a single-core waveguide geometry. Optical mode confinement is larger in the first passive waveguide than in the second passive waveguide. The first and second lengths are selected such that a temperature sensitivity of optical path length difference of the dual-geometry waveguide structure is lower than a temperature sensitivity of optical path length difference that would characterize a standard waveguide structure differing from the dual-geometry waveguide structure in that no transition structure is present within either arm of the standard waveguide structure, each arm of the standard waveguide structure either excluding any waveguide having a dual-core waveguide geometry or excluding any waveguide having a single-core waveguide geometry.
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公开(公告)号：US12206221B2
公开(公告)日：2025-01-21
申请号：US17468953
申请日：2021-09-08
Applicant: Minh Tran , Tin Komljenovic
Inventor： Minh Tran , Tin Komljenovic
IPC: H01S5/0687 , H01S5/026
Abstract: A device comprises three elements, realized as photonic integrated circuits. The first element comprises a tunable semiconductor laser emitting light at a laser output wavelength. The second element comprises a wavelength selective element, coupled to the first element. The third element comprises N photodetectors where N>=2, coupled to the second element. Light coupled into the second element from the first element is de-multiplexed by the wavelength selective element such that a ratio of light power coupled from the second element into one of the N photodetectors to light power coupled from the second element into another one of the N photodetectors is a function of the laser output wavelength. The responses of the N photodetectors facilitate at least one of measurement and control of the laser output wavelength.
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公开(公告)号：US20240418937A1
公开(公告)日：2024-12-19
申请号：US18337008
申请日：2023-06-18
Applicant: Tin Komljenovic , Minh Tran , Zeyu Zhang , Chong Zhang
Inventor： Tin Komljenovic , Minh Tran , Zeyu Zhang , Chong Zhang
IPC: G02B6/27
Abstract: A device has first, second and third elements fabricated on a common substrate. The first element supports a first optical mode in an active waveguide structure characterized by a mesa. The second element supports a second optical mode in a passive waveguide structure. The third element, at least partly butt-coupled to the first element, supports an intermediate optical mode in an intermediate waveguide structure characterized by a waveguide core cross section including a shallow step. A tapered waveguide structure in at least one of the second and third elements facilitates efficient adiabatic transformation between the second optical mode and the intermediate optical mode. No adiabatic transformation occurs between the intermediate optical mode and the first optical mode. Lithographic alignment marks facilitate precise alignment of the three elements during device fabrication.
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4.发明公开公开(公告)号：US20230400634A1
公开(公告)日：2023-12-14
申请号：US17838325
申请日：2022-06-13
Applicant: Minh Tran , Tin Komljenovic
Inventor： Minh Tran , Tin Komljenovic
CPC classification number: G02B6/1228 , G02B6/305 , G02B2006/12061 , H01S5/026 , H01S5/1014
Abstract: A device comprises first, second and third elements fabricated on a common substrate. The first element comprises an active waveguide structure comprising: a first portion supporting a first optical mode. The second element comprises a passive waveguide structure supporting a second optical mode. The third element, at least partly butt-coupled to the second portion, comprises an intermediate waveguide structure supporting intermediate optical modes. At least part of the second element is non-linear, supporting frequency conversion. A tapered waveguide structure in at least one of the second and third elements facilitates efficient adiabatic transformation between the first optical mode and one intermediate optical mode. No adiabatic transformation occurs between any intermediate optical mode and the first optical mode. Mutual alignments of the elements are defined using lithographic alignment marks.
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5.发明申请公开(公告)号：US20220120970A1
公开(公告)日：2022-04-21
申请号：US17078859
申请日：2020-10-23
Applicant: Chong Zhang , Hyun Dai Park , Minh Tran , Tin Komljenovic
Inventor： Chong Zhang , Hyun Dai Park , Minh Tran , Tin Komljenovic
Abstract: An optical device comprises first, second and third elements fabricated on a common substrate. The first element comprises an active waveguide structure supporting a first optical mode, the second element, fabricated on a planarized top surface of the first element, comprises a passive waveguide structure supporting a second optical mode, and the third element, at least partly butt-coupled to the first element, comprises an intermediate waveguide structure, positioned such that a top surface of the intermediate structure underlies a bottom surface of the passive waveguide structure. If the first optical mode differs from the second optical mode by more than a predetermined amount, a tapered waveguide structure in at least one of the second and third elements facilitates efficient adiabatic transformation between the first optical mode and the second optical mode. Mutual alignments of the first, second and third elements are defined using lithographic alignment marks.
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Patent Agency Ranking
6.发明授权公开(公告)号：US11287573B1
公开(公告)日：2022-03-29
申请号：US17078859
申请日：2020-10-23
Applicant: Chong Zhang , Hyun Dai Park , Minh Tran , Tin Komljenovic
Inventor： Chong Zhang , Hyun Dai Park , Minh Tran , Tin Komljenovic
Abstract: An optical device comprises first, second and third elements fabricated on a common substrate. The first element comprises an active waveguide structure supporting a first optical mode, the second element, fabricated on a planarized top surface of the first element, comprises a passive waveguide structure supporting a second optical mode, and the third element, at least partly butt-coupled to the first element, comprises an intermediate waveguide structure, positioned such that a top surface of the intermediate structure underlies a bottom surface of the passive waveguide structure. If the first optical mode differs from the second optical mode by more than a predetermined amount, a tapered waveguide structure in at least one of the second and third elements facilitates efficient adiabatic transformation between the first optical mode and the second optical mode. Mutual alignments of the first, second and third elements are defined using lithographic alignment marks.
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公开(公告)号：US20210088727A1
公开(公告)日：2021-03-25
申请号：US16600349
申请日：2019-10-11
Applicant: Hyundai Park , Tin Komljenovic , Chong Zhang , Minh Tran
Inventor： Hyundai Park , Tin Komljenovic , Chong Zhang , Minh Tran
Abstract: A device providing efficient transformation between an initial optical mode and a second optical mode includes first, second and third elements fabricated on a common substrate. The first element includes first and second active sub-layers supporting initial and final optical modes with efficient mode transformation therebetween. The second element includes a passive waveguide structure supporting a second optical mode. The third element, at least partly butt-coupled to the first element, includes an intermediate waveguide structure supporting an intermediate optical mode. If the final optical mode differs from the second optical mode by more than a predetermined amount, a tapered waveguide structure in the second or third elements facilitates efficient transformation between the intermediate optical mode and the second optical mode. Precise alignment of sub-elements formed in one of the elements, relative to sub-elements formed in another one of the elements, is defined using lithographic alignment marks.
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公开(公告)号：US12247835B2
公开(公告)日：2025-03-11
申请号：US17676422
申请日：2022-02-21
Applicant: Tin Komljenovic , Minh Tran
Inventor： Tin Komljenovic , Minh Tran
IPC: G01B9/02001 , G02B6/293
Abstract: A radio frequency generator has first and second lasers configured to emit first and second optical outputs; a reference module configured to receive at least part of the first and second optical outputs from the first and second lasers; a control module connected to the first and second lasers and to the reference module; and an optical-to-electrical (O/E) converter configured to process optical signals, originating from the first and second single-frequency lasers, to provide a radio frequency output.
Another radio frequency generator has a control module; and a reference module connected to the control module. The reference module includes a photonic integrated circuit (PIC) having first and second single-frequency lasers configured to emit first and second optical outputs; an unbalanced Mach-Zehnder interferometer (UMZI) with first and second 3×3 optical splitter/combiners; first and second peripheral splitter/combiners; and an output splitter/combiner.-
公开(公告)号：US20240176072A1
公开(公告)日：2024-05-30
申请号：US18071239
申请日：2022-11-29
Applicant: Tin Komljenovic , Minh Tran , Zeyu Zhang
Inventor： Tin Komljenovic , Minh Tran , Zeyu Zhang
IPC: G02B6/122
CPC classification number: G02B6/1228
Abstract: A device has first, second and third elements fabricated on a common substrate. The first element supports a first optical mode in a first active waveguide, the second element supports a second optical mode in a second passive waveguide, and the third element, at least partly butt-coupled to the first element, has a bottom waveguide, supporting a bottom intermediate mode, overlying a top waveguide, supporting a top intermediate mode. A tapered waveguide structure in the top waveguide facilitates efficient adiabatic transformation between the top intermediate mode and the bottom intermediate mode. Tapering in at least one of the bottom waveguide and the second waveguide facilitates efficient adiabatic transformation between the second optical mode and the bottom intermediate optical mode. No adiabatic transformation occurs between either of the intermediate optical modes and the first optical mode. Lithographic alignment marks facilitate precise alignment of the three elements during device fabrication.
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公开(公告)号：US20230420916A1
公开(公告)日：2023-12-28
申请号：US17851688
申请日：2022-06-28
Applicant: Chong Zhang , Minh Tran , Tin Komljenovic
Inventor： Chong Zhang , Minh Tran , Tin Komljenovic
CPC classification number: H01S5/1014 , H01S5/0213 , H01S5/02476 , H01S5/026
Abstract: A device includes a first element having a passive waveguide structure supporting a first optical mode, a second element providing heat spreading functionality, a third element thermally coupled to the second element, having an active waveguide structure supporting a second optical mode, and a fourth element, at least partly butt-coupled to the third element, having an intermediate waveguide structure supporting intermediate optical modes. A tapered waveguide structure in either one of the first and fourth elements facilitates efficient adiabatic transformation between the first optical mode and one of the intermediate optical modes. No adiabatic transformation occurs between any of the intermediate optical modes and the second optical mode. Mutual alignments of the first, second, third and fourth elements are defined using lithographic alignment marks that facilitate precise alignment between layers formed during processing steps of fabricating the first, second, third and fourth elements.
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