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公开(公告)号：US11841271B2
公开(公告)日：2023-12-12
申请号：US17533926
申请日：2021-11-23
Applicant: California Institute of Technology
Inventor： Alireza Marandi , Mingchen Liu , Arkadev Roy
CPC classification number: G01J3/4338 , G01J3/027 , G01J3/0275 , G01J2003/4332
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：US20210141285A1
公开(公告)日：2021-05-13
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：US20200285131A1
公开(公告)日：2020-09-10
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
IPC: G02F1/39
Abstract: An optical parametric oscillator (OPO) including a thin film waveguide including a material having a second order nonlinear susceptibility generating an electromagnetic field in response to pump electromagnetic field inputted into the thin film waveguide. The electromagnetic field has a first wavelength or first set of wavelengths longer than a second wavelength or second set of wavelengths of the pump electromagnetic field. 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 electromagnetic field along the thin film waveguide.
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公开(公告)号：US20250120318A1
公开(公告)日：2025-04-10
申请号：US18908317
申请日：2024-10-07
Applicant: California Institute of Technology
Inventor： Harold Frank Greer , Jenni Solgaard , Ivy Chen , Austin Minnich , Alireza Marandi , Ryoto Sekine
IPC: H10N30/082 , H01L21/67
Abstract: Lithium niobate (LiNbO3, LN) is a ferroelectric crystal of interest for integrated photonics owing to its large second-order optical nonlinearity and the ability to impart periodic poling via an external electric field. However, on-chip device performance based on thin-film lithium niobate (TFLN) is presently limited by propagation losses arising from surface roughness on the nano- and microscale. Atomic layer etching (ALE) can smooth these features and thereby increase photonic performance. In one embodiment disclosed herein, an isotropic ALE process for x-cut MgO-doped LN uses sequential exposures of H2 and SF6/Ar plasmas. We observed an etch rate of 1.59±0.02 nm/cycle with a synergy of 96.9%. ALE can be achieved with SF6/O2 or Cl2/BCl3 plasma exposures in place of the SF6/Ar plasma step with synergies of 99.5% and 91.5% respectively. The process decreased the sidewall surface roughness of TFLN waveguides etched by physical Ar+ milling by 30% without additional wet processing.
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公开(公告)号：US20240201563A1
公开(公告)日：2024-06-20
申请号：US18543950
申请日：2023-12-18
Applicant: California Institute of Technology
Inventor： Luis M. Ledezma , Alireza Marandi , Robert M. Gray , Benjamin K. Gutierrez
CPC classification number: G02F1/39 , H01S5/0265 , H01S5/0657 , H01S5/125 , H01S5/141 , H01S5/50
Abstract: On-chip generation of coherent radiation, i.e. laser-like radiation, can be tuned over broad and/or hard-to-access wavelength regions in an integrated platform. Target spectral coverage is beyond what could be achieved with existing integrated laser systems.
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Patent Agency Ranking
公开(公告)号：US20240005196A1
公开(公告)日：2024-01-04
申请号：US18155444
申请日：2023-01-17
Applicant: California Institute of Technology
Inventor： Alireza Marandi , Rajveer Nehra , Ryoto Sekine , Luis M. Ledezma
Abstract: A photonic integrated circuit comprising one or more waveguides comprising a second order non-linearity configured to operate on optical pulses each having a pulse length shorter than 1000 optical cycles, as measured at their full width at half maximum. The circuit is configured to generate one or more quantum states carried by one or more of the optical pulses, manipulate one or more of the quantum states, and/or measure one or more of the quantum states.
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公开(公告)号：US20210269708A1
公开(公告)日：2021-09-02
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
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：US20250085607A1
公开(公告)日：2025-03-13
申请号：US18805408
申请日：2024-08-14
Applicant: California Institute of Technology
Inventor： Ryoto Sekine , Robert M. Gray , Alireza Marandi
Abstract: An on-chip pulse synthesizer including an integrated photonic chip that temporally and spectrally shapes pulses of light using primarily quadratic optical nonlinearities. Through this synthesis, the light pulses undergo temporal shortening or reshaping, spectral broadening, wavelength conversion, or a combination thereof. A key aspect of this synthesis is the mode engineering of the waveguides, which includes converting the pump source mode to the relevant mode in the nonlinear optical region and tailoring the waveguide geometry and material stack to enable dispersion-engineering as well as engineering of the phase matching for various nonlinear processes.
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公开(公告)号：US20240402568A1
公开(公告)日：2024-12-05
申请号：US18317533
申请日：2023-05-15
Applicant: California Institute of Technology
Inventor： Robert M. Gray , Selina Zhou , Mingchen Liu , Arkadev Roy , Alireza Marandi
Abstract: A sensor including a resonator comprising a nonlinear material comprising a nonlinear susceptibility configured to convert a pump electromagnetic wave (EM) wave to a signal EM wave and an idler EM wave, wherein at least one of the pump EM wave, the signal EM wave and/or the idler EM wave is fed back through the nonlinear material to form one or more resonant EM waves. An actuator coupled to the resonator or a pump path to the resonator, controls at least one of a pump power of the pump EM wave, a detuning of the frequency modes of the resonator relative to one or more frequencies of the resonant EM waves, or a phase matching of the nonlinear material. An output of the resonator outputs one or more output EM waves comprising information about a sample coupled to the resonator.
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公开(公告)号：US20240061316A1
公开(公告)日：2024-02-22
申请号：US18448700
申请日：2023-08-11
Applicant: California Institute of Technology
Inventor： Gordon H.Y. Li , Midya Parto , Ryoto Sekine , James Williams , Christian Leefmans , Alireza Marandi
Abstract: A device including a programmable photonic processor configured to operate on optical pulses to perform computational sequences of linear operations and nonlinear operations each based on a parametric nonlinear optical process; a memory coupled to the processor and programmable to store or accumulate the analog optical pulse amplitudes of the optical pulses; a control circuit controlling the transfer of the analog optical pulse amplitudes between the processor and the memory according to a computation schedule; and wherein information is multiplexed in time by encoding the information onto the analog optical pulse amplitudes of the optical pulses occupying time bins at a fixed repetition rate such that the optical pulses, occupying different ones of the time bins, can be made to interact using appropriate temporal delays.
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