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公开(公告)号：US20240353618A1
公开(公告)日：2024-10-24
申请号：US18412058
申请日：2024-01-12
摘要： A light polarisation converter for a photonic integrated circuit, comprising a first layer. The first layer comprises a first surface and a second surface. The second surface is offset from the first surface along a first axis and a second axis. The first axis is perpendicular to the first surface. The second axis is parallel to the first surface. The light polarisation converter comprises a second layer and a waveguide. The waveguide is between, and in contact with, the first layer and the second layer. The waveguide comprises a first waveguide portion in contact with the first surface, and a second waveguide portion in contact with the second surface. The second waveguide portion is offset from the first waveguide portion. The first waveguide portion has a first thickness different to a second thickness of the first waveguide portion. The first thickness and the second thickness are perpendicular the first surface.
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公开(公告)号：US20240295694A1
公开(公告)日：2024-09-05
申请号：US18177552
申请日：2023-03-02
CPC分类号： G02B6/126 , G02B6/2766 , G02B6/2773
摘要： A system, method, and photonic chip for an optical circulator are described. The system includes a first polarization splitter, a first optical circuit, and a first controller. The first polarization splitter receives, at a first port of the first polarization splitter, a first optical signal. The first optical circuit is optically coupled to the first polarization splitter. The first optical circuit includes a first plurality of phase shifters. The first optical circuit receives, at a first port of the first optical circuit, a second optical signal. The first controller adjusts the first plurality of phase shifters such that the first optical circuit outputs the first optical signal at a second port of the first optical circuit and such that the first polarization splitter outputs the second optical signal at the first port of the first polarization splitter.
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公开(公告)号：US20240288749A1
公开(公告)日：2024-08-29
申请号：US18400550
申请日：2023-12-29
申请人： Infinera Corporation
发明人： Vikrant Lal , Peter Evans , David Welch , Mehrdad Ziari , Scott Corzine , Thomas Frost
CPC分类号： G02F1/395 , G02B6/126 , G02F1/212 , G02B2006/12061 , G02B2006/12121
摘要： Consistent with the present disclosure, a transceiver is implemented as a photonic integrated circuit (PIC) that includes a transmitter and a receiver. A laser is also provided that provides light to a splitter, which supplies a first portion of the light to the transmitter and a second power of the light to the receiver. Semiconductor optical amplifiers (SOAs) are provided at one or more locations on the PIC. In one example, at least one SOA is provided in the transmitter so that the transmitted optical signal has a desired power, and at least another SOA is provided in the receiver so that the local oscillator signal has a desired power. In a further example, an SOA is provided in the receiver to boost the power of the received optical signal. Preferably, the transceiver, including the SOAs, is monolithically integrated on a substrate, such as a substrate including indium phosphide (InP). Moreover, the SOA can be readily controlled via a low voltage current source consuming minimal electrical power.
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4.发明公开公开(公告)号：US20240241237A1
公开(公告)日：2024-07-18
申请号：US18615890
申请日：2024-03-25
申请人： AEVA, INC.
发明人： Bing Shen , Kevin Masuda , Brett E. Huff , Pradeep Srinivasan
CPC分类号： G01S7/499 , G01S17/06 , G02B6/1228 , G02B6/126 , G02B27/283 , G02B2006/12138 , G02B2006/1215
摘要： A polarization splitter-rotator (PSR) is described. The PSR having a silicon nitride based waveguide including a first silicon nitride segment comprising a tapered width in a longitudinal direction and a ridge extending in a transverse direction and an adiabatic coupler coupled with the first silicon nitride segment.
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公开(公告)号：US20240126013A1
公开(公告)日：2024-04-18
申请号：US18046189
申请日：2022-10-13
发明人： Yusheng Bian , Won Suk Lee , Andreas D. Stricker
CPC分类号： G02B6/126 , G02B6/1228
摘要： A structure includes a polarization device such as a polarization splitter, a polarization combiner or a polarization splitter rotator including a waveguide having a light absorber at an end section with an at least hook shape, e.g., it can be hooked or spiral shape. The structure also includes another waveguide adjacent the stated waveguide. The hook or spiral shape acts as a light absorber that reduces undesired optical noise such as excessive light insertion loss and/or light scattering. The hook or spiral shape may also be used on supplemental waveguides used to further filter and/or refine an optical signal in one of the waveguides of the polarization device, e.g., downstream of an output section of the polarization splitter and/or rotator.
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公开(公告)号：US20240077675A1
公开(公告)日：2024-03-07
申请号：US17902259
申请日：2022-09-02
发明人： Jonathan Edgar Roth
CPC分类号： G02B6/126 , G02B6/1228 , G02B6/125 , G02B2006/1215
摘要： A polarization splitter rotator includes a first lower waveguide and a second lower waveguide disposed on a first layer, the first lower waveguide and the second lower waveguide, in a first portion of the device, widening symmetrically as the first lower waveguide and the second lower waveguide extend from an input end of the device to an output end of the device, and, in a second portion of the device, at least the second lower waveguide widening further, asymmetrically, from the first lower waveguide, and a bus waveguide disposed on a second layer, above the first layer, at least partially overlapping portions of the first lower waveguide and the second lower waveguide.
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公开(公告)号：US11921324B2
公开(公告)日：2024-03-05
申请号：US17057600
申请日：2019-05-15
发明人： Kotaro Takeda , Yusuke Nasu
IPC分类号： G02B6/126 , H01L31/0224 , H01L31/101
CPC分类号： G02B6/126 , H01L31/022408 , H01L31/1013
摘要： A photodetector is realized which does not need an additional circuit for an inspection and may perform a characteristic evaluation inspection of optical input and electrical output such as optical sensitivity and OE characteristics of a photodetector alone with respect to wavelength and temperature dependent characteristics. A photodetector is provided in which light absorption layers are formed on a semiconductor substrate, the photodetector detects signal light incident on the light absorption layers from a direction in a substrate surface of the semiconductor substrate, and the light absorption layers have a portion not covered by an electrode for photocurrent detection connected with the light absorption layers in a case where the substrate surface of the semiconductor substrate is seen from a direction from an outside of the substrate surface.
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8.发明公开公开(公告)号：US20230417989A1
公开(公告)日：2023-12-28
申请号：US17808168
申请日：2022-06-22
发明人： Yusheng Bian
CPC分类号： G02B6/1228 , G02B6/126
摘要： Disclosed is a structure including a polarization device with first and second waveguides. The first waveguide includes a core (e.g., a silicon nitride (SiN) core) suitable for high-power applications. The second waveguide includes: a primary core (e.g., another SiN core), which is positioned laterally adjacent to the core of the first waveguide and suitable for high-power applications, and secondary core(s) stacked vertically with the primary core to steer the optical mode and ensure that mode matching occurs between adjacent first and second coupling sections of the first and second waveguides, respectively, in order to achieve high-power splitter and/or combiner functions. Optionally, the primary and secondary cores of the second waveguide can be tapered at least within the second coupling section to increase the likelihood of mode matching.
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9.发明公开公开(公告)号：US20230393335A1
公开(公告)日：2023-12-07
申请号：US17483968
申请日：2021-09-24
CPC分类号： G02B6/126 , G02B6/125 , H04L9/0852
摘要： A photonic integrated circuit includes a waveguide that receive photons from an optical fiber and directs the photons in a loop formed by the waveguide. The circuit also includes one or more of a variable optical attenuator and configured to adjust a number of the photons between a key level and one or more decoy levels, an intensity modulator coupled with the waveguide and configured to adjust a number of the photons between a key level and a decoy level, and a phase shifter coupled with the waveguide and configured to change a phase of the photons. The waveguide is configured to direct one or more of the photons back out of the optical fiber after the one or more of the photons has passed through the loop formed by the waveguide with a polarization state of the one or more of the photons rotated by 90°.
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公开(公告)号：US20230384519A1
公开(公告)日：2023-11-30
申请号：US17751777
申请日：2022-05-24
发明人： Tai-Chun Huang , Stefan Rusu
CPC分类号： G02B6/126 , G02B27/285 , G02B6/13 , G02B6/1228 , G02B6/124
摘要： A photonic polarizing beamsplitter is disclosed. The beamsplitter comprises a first waveguide, a second waveguide located above the first waveguide, and a birefringent coupler between the first waveguide and the second waveguide. The birefringent coupler has an effective refractive index for a TM mode which is greater than a refractive index of the first waveguide, and an effective refractive index for a TE mode which is less than the refractive index of the first waveguide. The second waveguide comprises a plurality of outwardly tapering legs with a gap between adjacent legs that are connected downstream to a body. The vertical beamsplitter uses less surface area.
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