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公开(公告)号：US11467470B2
公开(公告)日：2022-10-11
申请号：US17093021
申请日：2020-11-09
Applicant: California Institute of Technology
Inventor： Alireza Marandi , Saman Jahani
Abstract: An OPO including a resonator comprising a material having a nonlinear susceptibility generating an output electromagnetic field in response to a pump electromagnetic field inputted into the material. The output electromagnetic field has one or more output wavelengths longer than one or more pump wavelengths of the pump electromagnetic field. The resonator has dimensions less than, or on the order of, the one or more output wavelengths in free space.
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公开(公告)号：US20240419951A1
公开(公告)日：2024-12-19
申请号：US17973118
申请日：2022-10-25
Applicant: California Institute of Technology
Inventor： Gordon H.Y. Li , Ryoto Sekine , Rajveer Nehra , Robert M. Gray , Alireza Marandi
Abstract: A device implementing a nonlinear activation function including a material having nonlinear susceptibility phase-matching a coherent nonlinear interaction involving a signal comprising a signal wavelength and a bias comprising a bias wavelength, so that (1) a first phase difference between the signal and the bias induces the interaction comprising second harmonic generation (generating a second harmonic of the bias wavelength) or sum frequency generation (generating a sum frequency of the bias and the signal, and (2) a second phase difference between the signal and the bias induces the interaction comprising parametric amplification amplifying the bias and attenuating the signal. A positive input to the nonlinear activation function is represented by the signal having an input energy and the first phase difference. A negative input is represented by second phase difference. The output is an output energy of the signal as function of the input energy.
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公开(公告)号：US20240348015A1
公开(公告)日：2024-10-17
申请号：US18612461
申请日：2024-03-21
Applicant: California Institute of Technology
Inventor： Alireza Marandi , Luis M. Ledezma , Louise E. Schul , Selina Zhou
CPC classification number: H01S5/18327 , H01S5/041 , H01S5/2018
Abstract: A device including a chip including a photonic integrated circuit comprising an external cavity for a source of electromagnetic radiation; the source of electromagnetic radiation attached to a top surface of the chip, the source comprising a semiconductor active region comprising, or coupled to, an output for the electromagnetic radiation, wherein the output is oriented to emit the electromagnetic radiation into the top surface in an emission direction that is inclined with respect to a plane of propagation of the electromagnetic radiation in the external cavity; and a coupler coupling the active region to the external cavity via the top surface to integrate the external cavity with the active region. The coupler partially couples the electromagnetic radiation outputted from the active region to the external cavity, and feedback from the external cavity to the active region.
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Patent Agency Ranking
公开(公告)号：US11987737B2
公开(公告)日：2024-05-21
申请号：US17188593
申请日：2021-03-01
Applicant: California Institute of Technology
Inventor： Alireza Marandi , Joon Hwan Bang , Saman Jahani , Nicholas Kotov , Douglas G. Montjoy
CPC classification number: C09K11/025 , C09K11/54 , G02F1/37 , G02F1/39 , H02S10/30
Abstract: A metamaterial shell architected on a core particle (comprising organic or inorganic material) so as to form a novel class of structurally hierarchical particle that has degrees of freedom in design parameters stemming from effective optical response of the metamaterial shell and from the electromagnetic modes in the core to elicit optical behaviours that are not easily achievable and designable in particles having simpler or smoother geometries.
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公开(公告)号：US20230314605A1
公开(公告)日：2023-10-05
申请号：US18191949
申请日：2023-03-29
Applicant: California Institute of Technology
Inventor： Luis Costa , Alireza Marandi , Zhongwen Zhan
CPC classification number: G01S17/02 , G01S17/89 , G01S7/4818
Abstract: A sensor system including an optical fiber comprising a first spatial channel and a second spatial channel, wherein the spatial channels are coupled and electromagnetic radiation propagates with different group velocities in each of the spatial channels. The sensor system further includes a source inputting the electromagnetic radiation into the first spatial channel at an input; and a detection system coupled to an output of the fiber, the detection system including a detector detecting transmission of the electromagnetic radiation coupled into the second spatial channel at different positions along the fiber between the input to the output, and generating a signal in response thereto; and a computer processing the signal to obtain a localized measurement of a physical parameter at one or more of the different positions along the fiber.
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公开(公告)号：US20220163389A1
公开(公告)日：2022-05-26
申请号：US17533926
申请日：2021-11-23
Applicant: California Institute of Technology
Inventor： Alireza Marandi , Mingchen Liu , Arkadev Roy
Abstract: A system for performing spectroscopy, including a first frequency comb source outputting first electromagnetic radiation comprising a first frequency comb centered at a first wavelength and having a first repetition rate; a second frequency comb source outputting a second electromagnetic radiation comprising a second frequency comb centered at a second wavelength and having a second repetition rate; a nonlinear device positioned to receive the first frequency comb and the second frequency comb, wherein the nonlinear device interacts the first frequency comb and the second frequency comb through sum frequency generation or difference frequency generation so as to generate an output electromagnetic radiation; and a detection system outputting a signal in response to detecting an interference of the output electromagnetic radiation with a third electromagnetic radiation, the signal comprising information used for determining a spectrum of at least the first frequency comb or the second frequency comb.
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公开(公告)号：US20220123516A1
公开(公告)日：2022-04-21
申请号：US17500425
申请日：2021-10-13
Applicant: California Institute of Technology
Inventor： Qiushi Guo , Alireza Marandi
Abstract: A chip-scale mode-locked laser including a cavity including a gain medium for amplifying signal electromagnetic radiation (signal) through stimulated emission, the signal comprising a signal wavelength; and a passive or active mode-locking device to enforce pulse formation in the laser. The mode-locking device includes a thin-film waveguide having a thickness on the order of the signal wavelength so as to confine and guide the signal along the thin-film waveguide, and a material comprising a second-order nonlinear susceptibility to enable active or passive mode-locking of the signal. The mode-locking device leads to generation of pulses of the signal outputted from the mode-locked laser.
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公开(公告)号：US11226538B2
公开(公告)日：2022-01-18
申请号：US16813462
申请日：2020-03-09
Applicant: California Institute of Technology
Inventor： Alireza Marandi , Luis Ledezma , Yinglun Xu , Ryan M. Briggs
Abstract: An optical parametric oscillator (OPO) including a thin film waveguide including a material having a second order nonlinear susceptibility generating an electromagnetic wave in response to pump electromagnetic wave inputted into the thin film waveguide. The electromagnetic wave has a first wavelength or first set of wavelengths longer than a second wavelength or second set of wavelengths of the pump electromagnetic wave. The thin film waveguide has a thickness on the order of the first wavelength or the first set of wavelengths in the thin film waveguide so as to guide the output electromagnetic wave along the thin film waveguide.
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