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公开(公告)号：US20240353697A1
公开(公告)日：2024-10-24
申请号：US18626916
申请日：2024-04-04
发明人： Kensuke OGAWA
CPC分类号： G02F1/025 , G02F1/0155 , H04B10/43
摘要： An optical modulator element includes a rib optical waveguide, a first thin film, a first high-concentration doped region, and a first metal electrode. The rib optical waveguide includes a rib portion having a PN junction, a P-type slab region connected to a P-type region of the rib portion, and an N-type slab region connected to an N-type region of the rib portion. The first thin film is formed on the P-type slab region and has electron affinity different from electron affinity of a material for the P-type slab region. The first high-concentration doped region is a region in the P-type slab region, the region being at a position separate from the rib portion. The first metal electrode is electrically connected to the first high-concentration doped region positioned outward in the P-type slab region having the first thin film formed over the P-type slab region.
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公开(公告)号：US20240272512A1
公开(公告)日：2024-08-15
申请号：US18406795
申请日：2024-01-08
发明人： Nobuaki MITAMURA , Kazumasa SATO
CPC分类号： G02F1/2252 , G02F1/0136 , G02F1/2257 , G02F1/212
摘要： An optical device has an optical modulator element and an optical receiver element. The optical modulator element includes a first optical waveguide extending to a first end face, a first inter-element waveguide extending to a second end face, and an optical modulator including an electro-optic material. The optical receiver element includes a second optical waveguide extending to a third end face, a second inter-element waveguide extending to a fourth end face, an optical receiver, and a polarization element. In the optical device, the first inter-element waveguide and the second inter-element waveguide have been connected to each other by being butted against each other.
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公开(公告)号：US20240264506A1
公开(公告)日：2024-08-08
申请号：US18394665
申请日：2023-12-22
发明人： NOBUAKI MITAMURA
CPC分类号： G02F1/212 , G02F1/2255 , H04B10/40
摘要： An optical device includes a substrate having an optical waveguide formed on a substrate surface, a buffer layer that is laminated on the optical waveguide, an electrode that is formed on the buffer layer, an insulating layer that covers the electrode, and an adhesion layer that is formed between the electrode and the insulating layer.
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公开(公告)号：US12025866B2
公开(公告)日：2024-07-02
申请号：US17862903
申请日：2022-07-12
发明人： Masaki Sugiyama
CPC分类号： G02F1/0356 , G02F1/212 , G02F1/2255
摘要： An optical device includes an optical waveguide that is a rib type and that is formed of a thin film lithium niobate (LiNbO3: LN) substrate using a thin film LN crystal, and a buffer layer that is laminated on the optical waveguide. Furthermore, the optical device includes an electrode that is laminated on the buffer layer and that applies a voltage to the optical waveguide, and a gettering site that is disposed parallel to the optical waveguide and that traps an electric charge inside the optical waveguide.
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公开(公告)号：US12021562B2
公开(公告)日：2024-06-25
申请号：US17839549
申请日：2022-06-14
发明人： Akira Oka
CPC分类号： H04B10/40 , G02B6/2852 , H04B10/25891
摘要： A tap coupler includes a mode generation unit, a separation unit, and an output unit. The mode generation unit generates, in accordance with a discontinuous portion disposed on a travelling path of signal light that is propagating, a first mode of the signal light and a second mode that is different from the first mode. The separation unit separates, when the first mode and the second mode are input from the mode generation unit, the first mode and the second mode. The output unit outputs branch light in accordance with a transition of the second mode received from the separation unit.
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公开(公告)号：US20240134116A1
公开(公告)日：2024-04-25
申请号：US18235930
申请日：2023-08-20
发明人： Masaki SUGIYAMA
IPC分类号： G02B6/122
CPC分类号： G02B6/1228
摘要： An optical device includes a first layer, a second layer, two first waveguides arranged in a side by side manner in the first layer; two second waveguides arranged in a side by side manner in the second layer, and a third waveguide arranged between the first waveguides and between the second waveguides. The first waveguide includes a first tapered waveguide and a second tapered waveguide. The third waveguide includes a third tapered waveguide that is disposed side by side with the second tapered waveguides. The first tapered waveguide has a width that is gradually narrower as the first tapered waveguide is away from a joining point with the second tapered waveguide. The second tapered waveguide has a width that is gradually narrower as the second tapered waveguide is away from a joining point with the first tapered waveguide. The third tapered waveguide has a width that is gradually wider.
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公开(公告)号：US20240072900A1
公开(公告)日：2024-02-29
申请号：US18216972
申请日：2023-06-30
发明人： Daisuke MATSUKAWA
IPC分类号： H04B10/291 , H04B10/079
CPC分类号： H04B10/2912 , H04B10/07955 , H04B2210/003
摘要： An optical amplifier includes a first path and a second path, and an amplification unit that is arranged on one of the first path and the second path. The amplifier includes a first switch that is arranged on an input stage of the amplification unit, and that switches a third path that connects between the first path and the amplification unit or a fourth path that connects between the second path and the amplification unit. The amplifier includes a second switch that is arranged on an output stage of the amplification unit and that switches a fifth path that connects between the first path and the amplification unit or a sixth path that connects between the second path and the amplification unit. The first switch switches the third path over to the fourth path, and the second switch switches the fifth path to the sixth path.
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公开(公告)号：US11892716B2
公开(公告)日：2024-02-06
申请号：US17568261
申请日：2022-01-04
发明人： Masaki Sugiyama
CPC分类号： G02F1/035 , G02B6/13 , G02B2006/1204
摘要： An optical device includes a substrate, a layered structure provided on the substrate and including an intermediate layer, an optical waveguide formed of a thin crystal film having an electro-optic effect, and a buffer layer stacked in this order, and an electrode provided on or above the buffer layer and configured to apply a direct current voltage to the optical waveguide. The resistivity of the intermediate layer is higher than the resistivity of the buffer layer.
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公开(公告)号：US20240006846A1
公开(公告)日：2024-01-04
申请号：US18200936
申请日：2023-05-23
发明人： Toshio ISHII
IPC分类号： H01S5/0683 , H01S5/04 , H01S5/06 , H01S5/062 , H04B10/54
CPC分类号： H01S5/06832 , H01S5/041 , H01S5/0617 , H01S5/062 , H04B10/54
摘要： An optical device includes a generator, a light emitter, a modulator, an optical amplifier, a current source, a storage, and a controller. The generator generates an electric signal of a multilevel amplitude modulation method. The light emitter emits laser light. The modulator modulates the laser light using the electric signal and outputs an optical signal. The optical amplifier optically amplifies the modulated optical signal according to a drive current. The current source adjusts the drive current to be supplied to the optical amplifier. The storage previously stores an information with respect to input-output characteristics of the optical signal in the optical amplifier relative to drive current value of the drive current. The controller acquires, from the storage, the input-output characteristics corresponding to the drive current value of the drive current supplied to the optical amplifier and controls the electric signal based on the acquired input-output characteristics.
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公开(公告)号：US20230333439A1
公开(公告)日：2023-10-19
申请号：US18165039
申请日：2023-02-06
发明人： Masaki SUGIYAMA
CPC分类号： G02F1/2252 , G02F1/212 , G02F1/0121 , H04J14/06 , G02F2201/12 , G02F2201/17 , G02F2203/50
摘要： An optical modulator includes a first shifter and a second shifter. The first shifter includes a first waveguide through which first light passes, and a first electrode that causes power according to a drive voltage to act on the first waveguide. The first shifter shifts a phase of the first light passing through the first waveguide in accordance with the drive voltage applied to the first electrode. The second shifter includes a second waveguide through which second light passes, and a second electrode that causes power according to a drive voltage to act on the second waveguide. The second shifter shifts a phase of the second light passing through the second waveguide in accordance with the drive voltage applied to the second electrode. The second shifter is constituted to have a smaller amount of phase shift according to a predetermined amount of drive voltage than the first shifter.
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