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公开(公告)号：US20240280846A1
公开(公告)日：2024-08-22
申请号：US18652711
申请日：2024-05-01
发明人： Prashanta Kharel , Mian Zhang , Christian Reimer
CPC分类号： G02F1/0356 , G02B6/125 , G02F1/2255 , G02B2006/12142 , G02F2201/127 , G02F2202/20
摘要： A velocity mismatch between optical signals and microwave electrical signals in electro-optic devices, such as modulators, may be compensated by utilizing different lengths of bends in the optical waveguides as compared to the microwave electrodes to match the velocity of the microwave signal propagating along the coplanar waveguide to the velocity of the optical signal. To ensure the electrode bends do not affect the light in the optical waveguide bends, the electrode may have to be rerouted, e.g. above or below, the optical waveguide layer. To ensure that the pair of optical waveguides have the same optical length, a waveguide crossing may be used to cross the first waveguide through the second waveguide.
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公开(公告)号：US20220404652A1
公开(公告)日：2022-12-22
申请号：US17896995
申请日：2022-08-26
发明人： Prashanta Kharel , Mian Zhang , Christian Reimer
摘要： A velocity mismatch between optical signals and microwave electrical signals in electro-optic devices, such as modulators, may be compensated by utilizing different lengths of bends in the optical waveguides as compared to the microwave electrodes to match the velocity of the microwave signal propagating along the coplanar waveguide to the velocity of the optical signal. To ensure the electrode bends do not affect the light in the optical waveguide bends, the electrode may have to be rerouted, e.g. above or below, the optical waveguide layer. To ensure that the pair of optical waveguides have the same optical length, a waveguide crossing may be used to cross the first waveguide through the second waveguide.
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公开(公告)号：US20220214597A1
公开(公告)日：2022-07-07
申请号：US17701952
申请日：2022-03-23
发明人： Mian Zhang , Christian Reimer , Kevin Luke
摘要： An integrated electro-optic frequency comb generator based on ultralow loss integrated, e.g. thin-film lithium niobate, platform, which enables low power consumption comb generation spanning over a wider range of optical frequencies. The comb generator includes an intensity modulator, and at least one phase modulator, which provides a powerful technique to generate a broad high power comb, without using an optical resonator. A compact integrated electro-optic modulator based frequency comb generator, provides the benefits of integrated, e.g. lithium niobate, platform including low waveguide loss, high electro-optic modulation efficiency, small bending radius and flexible microwave design.
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公开(公告)号：US12001120B1
公开(公告)日：2024-06-04
申请号：US17556323
申请日：2021-12-20
发明人： Mian Zhang , Kevin Luke , Prashanta Kharel , Christian Reimer , Lingyan He
IPC分类号： G02F1/313
CPC分类号： G02F1/313 , G02F2201/302 , G02F2201/34 , G02F2202/101 , G02F2202/20
摘要： An optical device including a plurality of electrodes, an electro-optic component, an optical grating, and a buried back reflector is described. The electro-optic component includes at least one optical material exhibiting an electro-optic effect. The optical grating is optically coupled with the electro-optic component. In some embodiments, the optical grating includes a vertical optical grating coupler. The buried back reflector is optically coupled with the optical grating. The buried back reflector is configured to increase a coupling efficiency of the optical grating to an out-of-plane optical mode and configured to reduce a performance perturbation to the plurality of electrodes. The buried back reflector may include a metal layer having a thickness of at least thirty nanometers and not more than five hundred nanometers.
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公开(公告)号：US11733586B2
公开(公告)日：2023-08-22
申请号：US17701952
申请日：2022-03-23
发明人： Mian Zhang , Christian Reimer , Kevin Luke
CPC分类号： G02F1/365 , G02F1/3551 , G02F2203/56
摘要： An integrated electro-optic frequency comb generator based on ultralow loss integrated, e.g. thin-film lithium niobate, platform, which enables low power consumption comb generation spanning over a wider range of optical frequencies. The comb generator includes an intensity modulator, and at least one phase modulator, which provides a powerful technique to generate a broad high power comb, without using an optical resonator. A compact integrated electro-optic modulator based frequency comb generator, provides the benefits of integrated, e.g. lithium niobate, platform including low waveguide loss, high electro-optic modulation efficiency, small bending radius and flexible microwave design.
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公开(公告)号：US20220390777A1
公开(公告)日：2022-12-08
申请号：US17843906
申请日：2022-06-17
发明人： Prashanta Kharel , Mian Zhang , Christian Reimer , Kevin Luke , Lingyan He
IPC分类号： G02F1/035
摘要： An optical device including a waveguide and an electrode is described. The waveguide includes at least one optical material having an electro-optic effect. The electrode includes a channel region and extensions protruding from the channel region. The extensions are closer to a portion of the waveguide than the channel region is.
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公开(公告)号：US11474384B2
公开(公告)日：2022-10-18
申请号：US16838763
申请日：2020-04-02
发明人： Prashanta Kharel , Mian Zhang , Christian Reimer
摘要： A velocity mismatch between optical signals and microwave electrical signals in electro-optic devices, such as modulators, may be compensated by utilizing different lengths of bends in the optical waveguides as compared to the microwave electrodes to match the velocity of the microwave signal propagating along the coplanar waveguide to the velocity of the optical signal. To ensure the electrode bends do not affect the light in the optical waveguide bends, the electrode may have to be rerouted, e.g. above or below, the optical waveguide layer. To ensure that the pair of optical waveguides have the same optical length, a waveguide crossing may be used to cross the first waveguide through the second waveguide.
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公开(公告)号：US20210157177A1
公开(公告)日：2021-05-27
申请号：US17102047
申请日：2020-11-23
发明人： Prashanta Kharel , Mian Zhang , Christian Reimer , Kevin Luke , Lingyan He
IPC分类号： G02F1/035
摘要： An optical device including a waveguide and an electrode is described. The waveguide includes at least one optical material having an electro-optic effect. The electrode includes a channel region and extensions protruding from the channel region. The extensions are closer to a portion of the waveguide than the channel region is.
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公开(公告)号：US12013601B2
公开(公告)日：2024-06-18
申请号：US17896995
申请日：2022-08-26
发明人： Prashanta Kharel , Mian Zhang , Christian Reimer
CPC分类号： G02F1/0356 , G02B6/125 , G02F1/2255 , G02B2006/12142 , G02F2201/127 , G02F2202/20
摘要： A velocity mismatch between optical signals and microwave electrical signals in electro-optic devices, such as modulators, may be compensated by utilizing different lengths of bends in the optical waveguides as compared to the microwave electrodes to match the velocity of the microwave signal propagating along the coplanar waveguide to the velocity of the optical signal. To ensure the electrode bends do not affect the light in the optical waveguide bends, the electrode may have to be rerouted, e.g. above or below, the optical waveguide layer. To ensure that the pair of optical waveguides have the same optical length, a waveguide crossing may be used to cross the first waveguide through the second waveguide.
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10.发明公开公开(公告)号：US20240184149A1
公开(公告)日：2024-06-06
申请号：US18532941
申请日：2023-12-07
发明人： Jeffrey Cole Holzgrafe , Christian Reimer , Mian Zhang , Prashanta Kharel , Kevin Luke , Lingyan He
IPC分类号： G02F1/035
CPC分类号： G02F1/0356 , G02F2201/063 , G02F2201/122 , G02F2202/20
摘要： An optical modulator includes optical material(s) and first and second differential electrode pairs. The optical material(s) exhibit an electro-optic effect and include lithium. The optical material(s) include first and second waveguides and first and second slab portions adjoining the first and second waveguides. The first differential electrode pair has electrodes arranged on opposing sides of the first waveguide. The second differential electrode pair has electrodes arranged on opposing sides of the second waveguide. The negative electrodes are arranged on distal sides of the waveguide relative to the other waveguide. The positive electrodes are arranged on proximal sides of waveguide relative to the other waveguide. The first and second waveguides, the first and second slab portions, and the first and second differential electrode pairs reside on a substrate structure. No portion of the first slab portion is between the first or second differential electrode pair and the substrate structure.
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