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公开(公告)号：US20210381906A1
公开(公告)日：2021-12-09
申请号：US17338313
申请日：2021-06-03
申请人： Fluke Corporation
摘要： A photonic device has a substrate with one or more optical resonators having a first resonant frequency response relative to temperature and a different second resonant frequency response relative to temperature. A first waveguide optically couples a first light beam having a first frequency to a first optical resonator and a second waveguide optically couples a second light beam having a second frequency to a second optical resonator. An optical shifter may shift an optical characteristic of the second light beam. A detector converts output light from the photonic device into an electric signal having a characteristic indicative of a physical condition, such as temperature, of the photonic device. In some cases, output light from the one or more optical resonators is combined and a temperature of the photonic device is determined from a beat frequency in the combined light. One or more multimode optical resonators may be used.
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公开(公告)号：US11815404B2
公开(公告)日：2023-11-14
申请号：US17199212
申请日：2021-03-11
申请人： Fluke Corporation
CPC分类号： G01K11/26 , G01K11/32 , G02B6/4215 , G01D5/35303
摘要： A system for determining a signature frequency of a photonic device includes a reference cell that receives a first light beam of a plurality of light beams. Based on a predetermined characteristic of the reference cell, the reference cell produces a first identifiable output indicative of a reference frequency in response to light in the first light beam having a particular frequency. A photonic device receives a second light beam of the plurality of light beams, and produces a second identifiable output in response to light in the second light beam having a frequency at the signature frequency. A computing device uses electrical signals representative of the first and second identifiable outputs to determine the signature frequency of the photonic device. A light source may emit a light beam having a controlled change of frequency and an optical splitter splits the light beam to produce the plurality of light beams.
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公开(公告)号：US20210381908A1
公开(公告)日：2021-12-09
申请号：US17338454
申请日：2021-06-03
申请人： Fluke Corporation
IPC分类号： G01K11/3206 , G01B9/02
摘要： A temperature measurement technology includes generating an input optical signal at a wavelength using an optical signal generator, splitting the input optical signal into a first beam and a second beam, optically transmitting the first beam through the first arm of an interferometer, transmitting the second beam through a second arm of the interferometer that introduces a phase shift in the second beam relative to the first beam, combining at least a portion of the transmitted first beam and the transmitted phase-shifted second beam to produce an output optical signal, measuring an optical signal intensity of the output optical signal, and correlating the measured optical signal intensity with a temperature to produce a measured temperature. Alternatively, the input optical signal may be transmitted through two or more interferometers.
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公开(公告)号：US11906368B2
公开(公告)日：2024-02-20
申请号：US17338454
申请日：2021-06-03
申请人： Fluke Corporation
IPC分类号： G01K11/3206 , G01B9/02015 , G01K15/00 , G01K11/32
CPC分类号： G01K11/3206 , G01B9/02015 , G01K15/005 , G01K11/32
摘要： A temperature measurement technology includes generating an input optical signal at a wavelength using an optical signal generator, splitting the input optical signal into a first beam and a second beam, optically transmitting the first beam through the first arm of an interferometer, transmitting the second beam through a second arm of the interferometer that introduces a phase shift in the second beam relative to the first beam, combining at least a portion of the transmitted first beam and the transmitted phase-shifted second beam to produce an output optical signal, measuring an optical signal intensity of the output optical signal, and correlating the measured optical signal intensity with a temperature to produce a measured temperature. Alternatively, the input optical signal may be transmitted through two or more interferometers.
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公开(公告)号：US11815405B2
公开(公告)日：2023-11-14
申请号：US17338313
申请日：2021-06-03
申请人： Fluke Corporation
CPC分类号： G01K11/32 , G01D5/35335 , G01J5/0818 , G01J5/60 , G01K11/00 , G02B2006/12138
摘要： A photonic device has a substrate with one or more optical resonators having a first resonant frequency response relative to temperature and a different second resonant frequency response relative to temperature. A first waveguide optically couples a first light beam having a first frequency to a first optical resonator and a second waveguide optically couples a second light beam having a second frequency to a second optical resonator. An optical shifter may shift an optical characteristic of the second light beam. A detector converts output light from the photonic device into an electric signal having a characteristic indicative of a physical condition, such as temperature, of the photonic device. In some cases, output light from the one or more optical resonators is combined and a temperature of the photonic device is determined from a beat frequency in the combined light. One or more multimode optical resonators may be used.
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公开(公告)号：US20220291056A1
公开(公告)日：2022-09-15
申请号：US17199212
申请日：2021-03-11
申请人： Fluke Corporation
摘要： A system for determining a signature frequency of a photonic device includes a reference cell that receives a first light beam of a plurality of light beams. Based on a predetermined characteristic of the reference cell, the reference cell produces a first identifiable output indicative of a reference frequency in response to light in the first light beam having a particular frequency. A photonic device receives a second light beam of the plurality of light beams, and produces a second identifiable output in response to light in the second light beam having a frequency at the signature frequency. A computing device uses electrical signals representative of the first and second identifiable outputs to determine the signature frequency of the photonic device. A light source may emit a light beam having a controlled change of frequency and an optical splitter splits the light beam to produce the plurality of light beams.
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公开(公告)号：US20240255360A1
公开(公告)日：2024-08-01
申请号：US18162561
申请日：2023-01-31
申请人： Fluke Corporation
IPC分类号： G01K11/3206
CPC分类号： G01K11/3206
摘要： A temperature measurement device includes a Fabry-Pérot resonator constructed of an inorganic optical material on an end of an optical fiber. Light in the optical fiber couples into a cavity of the Fabry-Pérot resonator and resonates at a resonance that varies with temperature of the Fabry-Pérot resonator. A detector receives output light from the Fabry-Pérot resonator and produces a signal indicating a detected resonance. Computing circuitry receives the signal, determines a temperature of the Fabry-Pérot resonator based on the detected resonance and a relationship that correlates the detected resonance with the temperature of the Fabry-Pérot resonator, and outputs a temperature measurement. The cavity may include a channel comprised of a material having a different refractive index than surrounding material. The temperature measurement device may include multiple Fabry-Pérot resonators. The inorganic optical material enables the temperature measurement device to output a temperature measurement that extends to at least 900° C.
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公开(公告)号：US20230304871A1
公开(公告)日：2023-09-28
申请号：US18186801
申请日：2023-03-20
申请人： Fluke Corporation
IPC分类号： G01K11/32
CPC分类号： G01K11/32
摘要： A temperature measurement system includes an optical resonator, a detector, and a computing subsystem. Light resonates in the optical resonator at resonant wavelengths that vary relative to a temperature in the optical resonator. The detector detects at least two resonant wavelengths of light output from the optical resonator. The computing subsystem determines the temperature of the optical resonator based at least in part on a mathematical operation on the at least two resonant wavelengths of the light output from the optical resonator. The mathematical operation may be a subtraction operation that determines a wavelength difference between two resonant wavelengths. In various implementations, the temperature of the optical resonator is determined based on a mapping of the wavelength difference to the temperature or based on an identified mode of the optical resonator and a mapping of the resonant wavelength to the temperature of the optical resonator in the mode.
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