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33results about How to "High Refractive Index Sensitivity" patented technology
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Terahertz waveband metamaterial sensor
ActiveCN108414473ASimple structureHigh Q valuePhase-affecting property measurementsMetal stripsResonance
The invention provides a terahertz waveband metamaterial sensor, which comprises a dielectric layer and a sub-wavelength metal array metamaterial attached to the dielectric layer. A sub-wavelength metal array unit comprises circular resonance rings and metal strips, each circular resonance ring is provided with four openings identical in size in a skew-symmetric direction, and each metal strip ispositioned in the corresponding resonance ring and translated upwards by 1micron relative to the center of the corresponding resonance ring to form an asymmetric structure in the x direction. By introduction of the asymmetric structures, an EIT-like effect is realized, and a Q value and sensing properties of the sensor are improved. Sensitivity of the sensor is measured by translation quantity, inunit refractive index variation, of sharp transmission peak frequency generated by the EIT-like effect in a transmission spectrum, and high-sensitivity refractive index sensing in a frequency range of 400GHz-900GHz is realized.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Senor device based on fiber miniature Fabry-Perot cavity
The present invention provides a senor device based on a fiber miniature Fabry-Perot cavity. The device comprises a broadband light source, a circulator, a sensing head and a spectrum analyzer, the sensing head is composed of corrosion multi-mode fiber, microballoon and coating glue, and the coating glue is ultraviolet glue or high-temperature glue. The a multi-mode fiber end face is subjected to corrosion to obtain a taper chamber, a microballoon is inserted into the taper chamber of the corrosion multi-mode fiber, the taper chamber is sealed by using the coating glue which has one part penetrating into the taper chamber, and the microballoon and the coating glue end face form a Fabry-Perot cavity. The circulator receives light from the broadband light source and transmits the light to the sensing head, the sensing head reflects the light to the circulator, and the light is transmitted to the spectrum analyzer through the circulator to form a similar Fabry-Perot interferometer for measuring the wavelength drift of the reflection spectral signature and calculate the values of the measured enviromental parameters. The structure is compact, the manufacturing is simple and the cost is low.
Owner:CHINA JILIANG UNIV
Composite maximum-dip-angle fiber bragg grating biochemical sensor and production method thereof
InactiveCN104596941ASimple structureReduce volumeMaterial analysis by optical meansThermometers using physical/chemical changesChemical industryPhysics
The invention discloses a composite maximum-dip-angle fiber bragg grating biochemical sensor and a production method thereof. The composite maximum-dip-angle fiber bragg grating biochemical sensor comprises an optical fiber core and an optical fiber cladding, and is characterized in that a first oblique fiber bragg grating is arranged on the front section of the optical fiber core, and an angle formed between an oblique grating stripe of the first oblique bragg grating and a longitudinal axis of an optical fiber is 45 degrees; a second oblique fiber bragg grating is arranged on the front half section of the middle section of the optical fiber core, and an angle formed between an oblique grating stripe of the second oblique fiber bragg grating and the longitudinal axis of the optical fiber is 79 to 84 degrees; a fiber bragg grating is arranged on the rear half section of the middle section of the optical fiber core; the outer surfaces of the front section and the rear section of the optical fiber cladding are respectively coated with an optical fiber protective coating; the outer surface of the middle section of the optical fiber cladding is provided with a silane layer in an adsorbing manner; the outer surface of the silane layer is provided with an aptamer layer, and the aptamer layer has a selective absorption or sensitive characteristic for a target bio-molecular or a to-be-tested chemical component. The composite maximum-dip-angle fiber bragg grating biochemical sensor can be widely applied to the fields such as biology, chemical industry, medicine and life science.
Owner:CHONGQING UNIV OF TECH
Manufacturing method of metal film plated double-humped resonance liquid sensor based on SPR (Surface Plasmon Resonance)
InactiveCN102183487AHigh Refractive Index SensitivityImprove insulation performancePhase-affecting property measurementsFiberLiquid medium
The invention discloses a manufacturing method of a metal film plated double-humped resonance liquid sensor based on SPR (Surface Plasmon Resonance), which comprises the steps of: (1) engraving a double-humped long-cycle fiber grating; (2) determining the plating thickness of a metal film; (3) plating the metal film on a cladding layer of the fiber grating; (4) manufacturing a sensor; and (5) detecting double-hump signals. The invention provides a manufacturing method of a miniaturized, high integrated and high-sensitive film plated fiber grating liquid sensor capable of remotely measuring, and the SPR effect at the interface of the metal film and a liquid medium and the double-humped resonance effect of the fiber grating are effectively utilized. The sensor manufactured by using the method has high sensitivity on a detected liquid and has a measurement resolution up to 10<-7> on the liquid refractive index. Due to the integration of the advantages of the SPR effect, the double-humpedresonance effect and fiber grating sensing, the manufacturing method can be widely applied to manufacturing optical chemical sensors.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
High sensitivity photonic crystal fiber refractive index sensor and method for preparing same
ActiveCN102749304ASimple light pathHigh Refractive Index SensitivityPhase-affecting property measurementsSingle-mode optical fiberMicrometer
The invention discloses a high sensitivity photonic crystal fiber refractive index sensor and a method for preparing the same. The sensor comprises single-mode fibers at the two ends, and a small segment of micro-tensile photonic crystal fiber which is connected with the single-mode fibers and disposed at the middle part of the sensor. The length change of the sensor after being stretched is smaller than 0.5 cm. The micro-tensile photonic crystal fiber has a solid core and an air cladding, with a length of 10-30 mm. The preparing method is that through micro stretching the photonic crystal fiber, the fiber diameter is reduced, the light field in the air is increased and the interaction between the light field and the environment is increased. The preparing method of the sensor is simple and feasible, and the sensor has a broad application prospect in fields such as optical fiber sensing. The photonic crystal fiber with a waist diameter of 30 micrometer can obtain a refractive index sensitivity of 1629.03nm / RIU at present.
Owner:NANJING UNIVERSTIY SUZHOU HIGH TECH INST
Composite fiber grating sensor and dual-parameter measurement method of refractive index and temperature
ActiveCN109709070ASimple structureImprove performancePhase-affecting property measurementsThermometers using physical/chemical changesGratingWave measure
The invention discloses a composite fiber grating sensor and the dual-parameter measurement method of a refractive index and a temperature. A sensor structure comprises a single mode fiber (1) and a single mode fiber core (2). The single mode fiber core (2) is provided with a hybrid grating formed by a long period grating (3) and an inclined grating (4) along a horizontal direction. Incident light(5) is emitted into the hybrid grating, and then emergent light (6) enters into an optical wave measuring system. The wavelength offset of an inclined grating refractive index measurement factor is acquired, and then an actual sensitivity value is obtained through the inversion of a sensitivity coefficient. Then, the actual sensitivity value is used to compensate the wavelength shift caused by arefractive index in the dual-parameter measurement factor of the long period grating, and a measured temperature is acquired, and the dual-parameter measurement of the refractive index and the temperature is realized. Two parameters can be measured simultaneously, the structure is simple, a calculated amount is reduced, and the advantage of the high refractive index sensitivity in a traditional long period grating and the advantage of high temperature sensitivity in the inclined grating are possessed simultaneously.
Owner:TIANJIN UNIV
Hybrid structure interferometer sensor for three-parameter measurement
ActiveCN111412938AHigh Refractive Index SensitivityConverting sensor output opticallyRefractive indexPhotonic-crystal fiber
The invention relates to a hybrid structure interferometer sensor for three-parameter measurement. The hybrid structure interferometer sensor comprises a first single-mode optical fiber, a coreless optical fiber microsphere cavity, a photonic crystal fiber and a second single-mode optical fiber which are sequentially welded from left to right. Through the coreless optical fiber microsphere cavityand the small section of photonic crystal fiber taper, the sensor not only has the function of a Fabry-Perot interferometer, but also has the function of a Mach-Zehnder interferometer. The interferometer sensor provided by the invention has the advantages of simple structure manufacturing, high sensitivity, good stability and the like. Meanwhile, the sensor can also measure three parameters of transverse pressure, temperature and refractive index.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Broadband interference type photoelectrode biomolecular sensor of graphene oxide fiber bragg grating
InactiveCN110823843AGuaranteed Resonant Absorption SpectroscopyStrong polarization dependenceTransmissivity measurementsFiberBio molecules
The invention relates to a photoelectrode biomolecular sensor, in particular to a broadband interference type photoelectrode biomolecular sensor and method of a graphene oxide fiber bragg grating. Thesensor comprises an optical fiber core, an optical fiber cladding, an optical fiber coating layer, and a large-angle inclined fiber bragg grating arranged in the middle of the optical fiber core; coating layers of the middle section and the rear section of an optical fiber are completely removed, the tail end surface of the rear section of the optical fiber is plated with a silver reflecting film, the distance between the rear end of the large-angle inclined optical fiber grating and the silver reflecting film at the tail end of the optical fiber ranges from 30 mm to 60 mm, and an optical fiber micro Michelson interference cavity is formed. A silane layer, a nano gold shell particle layer, a graphene oxide layer and a biomolecule sensitive layer are arranged on the cladding surface from the starting end of the large-angle tilted fiber bragg grating to the tail end of the optical fiber. The photoelectrode biomolecular sensor structure can be used to increase the action distance betweenLSPR excited by a light wave evanescent place and biomolecules, is convenient to integrate and apply, has very high robustness, and can be applied to the fields of biomedicine, life science, environmental monitoring and the like.
Owner:CHONGQING UNIV OF TECH +1
Method for on-line measuring microbe film thickness by optical fibre bragg grating sensor
The invention discloses an on-line measuring method of microbial film thickness by using a Fiber Bragg Grating (FBG) sensor, which is characterized by comprising the following steps: step one: the microbial film thickness d and a microbial film refractive index n2 are calibrated by the Abell refractometer and an optical microscope, thus determining the relational function f(n2) between the microbial film refractive index n2 and the microbial film thickness, namely, determining that d is equal to f(n2); step two: a given D type FBG sensor is placed in a trickling biofilter; and step three, a broadband laser light source emits broadband laser with the wavelength of 1450nm to 1590nm, the broadband laser is injected into photosensitive single-mode fiber by a fiber optic isolator and transmitted to the D type FBG along the optical fiber after passing through a fiber optic coupler; the laser with the wavelength of Lambda0 positioned at a resonant center is intensely reflected in the D type FBG, the reflected laser is output into a spectrum analyzer by the fiber optic isolator after passing through the fiber optic coupler, and the spectrum analyzer displays the size of the wavelength at the resonant center so as to obtain the refractive index of the microbial film at the moment.
Owner:重庆工学院
Sagnac dual-parameter fiber sensor based on high birefringence micro/nano fiber
ActiveCN109374027AHigh Refractive Index SensitivityReduce volumeConverting sensor output opticallyRefractive indexLight beam
The invention discloses a sagnac dual-parameter fiber sensor based on a high birefringence micro / nano fiber. The sensor comprises a broadband light source and a Saganc sensing unit with a built-in high birefringence micro / nano fiber. An input end of the Saganc sensing unit receives the broadband light source and outputs a spectral interference signal, since the mode interference and Sagnac interference of a beam in the Sagnac sensing unit have different sensitivities to a refractive index and temperature, the wavelength demodulation of the interference signal of an output spectrum is performed, and the sensing of refractive index and temperature parameters can be achieved. The fiber sensor provided by the invention has the characteristics of all fiber, compact structure, low cost, simple manufacture and low loss, and the sensing of the refractive index and temperature parameters are achieved.
Owner:HUAZHONG UNIV OF SCI & TECH
Far-infrared domain polarization-insensitive all-dielectric super-surface structure and manufacturing method thereof
ActiveCN109507762AHigh Refractive Index SensitivityHigh Q valueOptical elementsMicro nanoFar infrared
The invention belongs to the technical field of micro-nano photoelectric device electromagnetic wave regulation and sensing detection, and particularly relates to a far-infrared domain polarization-insensitive all-dielectric super-surface structure and a manufacturing method thereof. The super-surface comprises a substrate and a concentric double-closed dielectric resonance loop unit located on the surface of the substrate and distributed in the two-dimensional periodicity; used base materials of the substrate and concentric double-closed dielectric resonance loop unit are all-dielectric materials. The super-surface is insensitive to the polarization of excitation electromagnetic waves due to the high symmetry of the structure; the Fano resonance line font with high modulation depth and high Q values in a far-infrared domain can be obtained through the modulation of geometric parameters; because the preferred base materials for constructing the super-surface are all-dielectric Si and SiO2 materials, the process is mature, simple and easy to operate, and the manufacturing cost is low.
Owner:PINGDINGSHAN UNIVERSITY
Full-wavelength local plasma resonant transducer and preparation method thereof
ActiveCN104777135AHigh Refractive Index SensitivityEnhanced Raman ScatteringMaterial analysis by optical meansAngle of incidenceRefractive index
The invention discloses a full-wavelength local plasma resonant transducer and a preparation method thereof. The sensor is actually an aluminum nano conical array, wherein the nano conical array is formed by the recesses, which are periodically arranged on the surface of an aluminum sheet. By adjusting the incidence angle, three sizes of a cone, and the length of the arrangement period, different local surface plasma resonance peaks in the full-length range can be obtained and are capable of being applied to high-sensitivity refractive index sensor, surface enhanced fluorescence, surface enhanced Raman scattering, and the like according to the different needs. The preparation technology is simple, the structure is controllable, the cost is low, and the resonant transducer can be massively produced.
Owner:SUN YAT SEN UNIV
Manufacture method for double-humped resonance coating optical fiber grating gas-sensing sensor
InactiveCN101017137AExpanding the Range of Sensing ApplicationsLarge specific surface areaPhase-affecting property measurementsFiberThin film sensor
This invention relates to one double peak vibration coating fiber and grating sensor method in sensor process technique field, which comprises the following steps: a, selecting fiber grating; b, determining coat film thickness; c, determining double peak center wave length; d, fiber grating cover coating; e, sensor probe processing; f, double peak signal testing. This invention provides one small shaped, highly integrated and accurate film fiber and grating gas sensitive sensor process method.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
2 [um] waveband random optical fiber laser device based on inclined optical fiber grating
PendingCN111446612AHigh Refractive Index SensitivityIncrease output powerActive medium shape and constructionRandom laserGrating
The invention discloses a 2 [um] waveband random optical fiber laser device based on an inclined optical fiber grating, and belongs to the technical field of optical fiber laser devices. The 2 [um] waveband random optical fiber laser device is composed of a pumping source, an optical fiber combiner, an optical isolator, a wavelength division multiplexer, an optical circulator, a first double-cladding thulium-doped optical fiber, a second double-cladding thulium-doped optical fiber and an inclined optical fiber grating inscribed on the second double-cladding thulium-doped optical fiber. According to the invention, the thulium-doped optical fiber is used for providing optical gain, the inclined optical fiber grating is etched on the second double-cladding thulium-doped optical fiber, the second-order Raman light oscillation starting is restrained by using the special refractive index distribution of the inclined optical fiber grating, and the generated random laser is output through thesecond double-cladding thulium-doped optical fiber inscribed with the inclined optical fiber grating; and the 2 [um] waveband random optical fiber laser device has the advantages of being high in conversion efficiency and output power and capable of acquiring specific-wavelength random laser output.
![2 [um] waveband random optical fiber laser device based on inclined optical fiber grating](https://images-eureka.patsnap.com/patent_img/124d539c-5404-46bc-a465-5973be319a71/HDA0002500103380000011.png "2 [um] waveband random optical fiber laser device based on inclined optical fiber grating")
Owner:CHINA JILIANG UNIV
A Terahertz Band Metamaterial Sensor Based on Electromagnetic-Induced Transparency Effect
ActiveCN108572162BHigh Q valueHigh Refractive Index SensitivityPhase-affecting property measurementsDark modeRefractive index
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Method for on-line measuring microbiological film thickness by fiber prague grating sensor
The invention discloses an on-line measuring method of microbial film thickness by using a Fiber Bragg Grating (FBG) sensor, which is characterized by comprising the following steps: step one: the microbial film thickness d and a microbial film refractive index n2 are calibrated by the Abell refractometer and an optical microscope, thus determining the relational function f(n2) between the microbial film refractive index n2 and the microbial film thickness, namely, determining that d is equal to f(n2); step two: a given D type FBG sensor is placed in a trickling biofilter; and step three, a broadband laser light source emits broadband laser with the wavelength of 1450nm to 1590nm, the broadband laser is injected into photosensitive single-mode fiber by a fiber optic isolator and transmitted to the D type FBG along the optical fiber after passing through a fiber optic coupler; the laser with the wavelength of Lambda0 positioned at a resonant center is intensely reflected in the D type FBG, the reflected laser is output into a spectrum analyzer by the fiber optic isolator after passing through the fiber optic coupler, and the spectrum analyzer displays the size of the wavelength at the resonant center so as to obtain the refractive index of the microbial film at the moment.
Owner:重庆工学院
A full-wavelength localized plasmon resonance sensor and its preparation method
ActiveCN104777135BHigh Refractive Index SensitivityEnhanced Raman ScatteringMaterial analysis by optical meansSensor arrayFluorescence
The invention discloses a full-wavelength local plasma resonance sensor and a preparation method thereof. The sensor is an aluminum nano-cone array, and the nano-cone array is formed by interlacing periodically arranged depressions on the surface of an aluminum sheet. The present invention can obtain different local surface plasmon resonance peaks in the full wavelength range by adjusting the incident angle, the three-dimensional size of the cone, and the size of the cone arrangement period, and can be applied to high-sensitivity refractive index sensing, Surface-enhanced fluorescence or surface-enhanced Raman scattering, etc. The invention has simple preparation technology, controllable structure, low cost and is suitable for large-scale production.
Owner:SUN YAT SEN UNIV
Whispering gallery mode spherical optical microcavity refractive index sensor and measurement device based on surface plasmon
ActiveCN111077112BRealize measurementImprove surface energyPhase-affecting property measurementsWhispering gallerySurface plasmon
The invention provides a whispering gallery mode spherical optical microcavity refractive index sensor and a measuring device based on surface plasmon, making full use of the high quality factor characteristics of the whispering gallery mode optical microcavity, and by coating the surface of the optical microcavity with a gold layer to excite the Surface plasmon can improve the surface energy and refractive index sensing sensitivity of the optical microcavity, and realize the measurement of the refractive index of the external medium. The optical microcavity refractive index sensor of the present invention comprises a micro-nano optical fiber and a whispering gallery mode spherical optical microcavity, wherein the micro-nano fiber is in contact with the whispering gallery mode spherical optical microcavity; the surface of the whispering gallery mode spherical optical microcavity is A crescent-shaped gold layer is plated on top to excite surface plasmons and enhance the sensitivity of the spherical optical microcavity to changes in the refractive index of the external medium. The invention has the advantages of small size, simple preparation method, easy integration and the like, and can be applied to the fields of chemical or biological sensing and the like.
Owner:BEIHANG UNIV
A far-infrared domain polarization-insensitive all-dielectric metasurface structure and fabrication method
ActiveCN109507762BHigh Refractive Index SensitivityHigh Q valueOptical elementsRefractive indexResonance line
The invention belongs to the technical field of micro-nano photoelectric device electromagnetic wave regulation and sensing detection, and particularly relates to a far-infrared domain polarization-insensitive all-dielectric super-surface structure and a manufacturing method thereof. The super-surface comprises a substrate and a concentric double-closed dielectric resonance loop unit located on the surface of the substrate and distributed in the two-dimensional periodicity; used base materials of the substrate and concentric double-closed dielectric resonance loop unit are all-dielectric materials. The super-surface is insensitive to the polarization of excitation electromagnetic waves due to the high symmetry of the structure; the Fano resonance line font with high modulation depth and high Q values in a far-infrared domain can be obtained through the modulation of geometric parameters; because the preferred base materials for constructing the super-surface are all-dielectric Si and SiO2 materials, the process is mature, simple and easy to operate, and the manufacturing cost is low.
Owner:PINGDINGSHAN UNIVERSITY
A terahertz band metamaterial sensor
ActiveCN108414473BHigh Q valueRealize the EIT-like effectPhase-affecting property measurementsMetal stripsRefractive index
Owner:CHONGQING UNIV OF POSTS & TELECOMM
An electronically controlled and tuned long-period photonic crystal fiber grating temperature sensor
InactiveCN108692827BEnhanced couplingHigh Refractive Index SensitivityThermometers using physical/chemical changesLong-period fiber gratingGrating
The invention proposes an electronically controlled and tuned long-period photonic crystal fiber grating temperature sensor. Its photonic crystal fiber uses FK51A material, which has a higher refractive index than traditional silica, as its base. The air holes in the photonic crystal fiber core are filled with liquid crystal materials that are sensitive to temperature and electric fields. The long-period fiber grating effect is modulated by applying a voltage to the comb electrode to periodically change the refractive index of the liquid core. Its resonant wavelength can be determined by changing the comb electrode spacing (grating period). When the external temperature changes, the refractive index of the liquid crystal changes, so the temperature can be measured by monitoring the change in the resonant wavelength. The electronically controlled and tunable long-period photonic crystal fiber grating temperature sensor proposed by the present invention has the advantages of low cost, flexible structure, and tunable wavelength and bandwidth.
Owner:NORTHEASTERN UNIV LIAONING
Slit-embedded one-dimensional photonic crystal nano-beam cavity biosensor
PendingCN114397274AHigh Refractive Index SensitivityImprove robustnessPhase-affecting property measurementsOptical light guidesPhotonic crystalMicroRNA
The invention relates to a slit-embedded one-dimensional photonic crystal nano-beam cavity biosensor. The slit-embedded one-dimensional photonic crystal nano-beam cavity biosensor comprises a silicon waveguide; the nanometer beam cavity is positioned on the silicon waveguide; a plurality of through holes are etched in the nanometer beam cavity, the plurality of through holes are symmetrical about the center of the silicon waveguide, a slit is formed in the plurality of through holes, and the slit penetrates through the plurality of through holes. According to the invention, the low-concentration detection lower limit of the cancer early marker microRNA can be obtained.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
S-shaped optical fiber taper immunosensor, as well as preparation method and application thereof
Owner:JILIN UNIV
A sagnac dual-parameter fiber optic sensor based on high birefringence micro-nano fiber
ActiveCN109374027BHigh Refractive Index SensitivityReduce volumeConverting sensor output opticallyRefractive indexLight beam
The invention discloses a sagnac dual-parameter fiber sensor based on a high birefringence micro / nano fiber. The sensor comprises a broadband light source and a Saganc sensing unit with a built-in high birefringence micro / nano fiber. An input end of the Saganc sensing unit receives the broadband light source and outputs a spectral interference signal, since the mode interference and Sagnac interference of a beam in the Sagnac sensing unit have different sensitivities to a refractive index and temperature, the wavelength demodulation of the interference signal of an output spectrum is performed, and the sensing of refractive index and temperature parameters can be achieved. The fiber sensor provided by the invention has the characteristics of all fiber, compact structure, low cost, simple manufacture and low loss, and the sensing of the refractive index and temperature parameters are achieved.
Owner:HUAZHONG UNIV OF SCI & TECH
Optical fiber Bragg grating sensor making method
InactiveCN100468105CHigh sensitivityHigh strengthUsing optical meansOptical light guidesGratingFiber bragg grating sensor
The invention is an optical fiber Prague grating sensor, characterized in that it is made by the steps of: (1) making optical fiber Prague grating; (2) making D-type section of the optical fiber Prague grating; (3) selecting rectangular ceramic substrate wider than 2cm, making two semicircular grooves at the two ends of the ceramic substrate, respectively, to fix two end points of photosensitive single-mode optical fiber in the ceramic substrate, then making an optical fiber groove to store the D-type optical fiber Prague grating in the center of the ceramic substrate by laser machining technique, where the diameter of the optical fiber groove is somewhat greater than that of the optical fiber; (4) installing the D-type optical fiber Prague grating; and (5) placing the ready-made D-type optical fiber Prague grating in the optical fiber groove and making the Prague grating located in the center of the ceramic substrate and simultaneously under the monitoring of high power microscope, assuring a plane of the D-type optical fiber Prague grating and the top end surface of the ceramic substrate are basically on the same horizontal.
Owner:重庆工学院
Manufacturing method of metal film plated double-humped resonance liquid sensor based on SPR (Surface Plasmon Resonance)
InactiveCN102183487BHigh Refractive Index SensitivityImprove insulation performancePhase-affecting property measurementsFiberGrating
The invention discloses a manufacturing method of a metal film plated double-humped resonance liquid sensor based on SPR (Surface Plasmon Resonance), which comprises the steps of: (1) engraving a double-humped long-cycle fiber grating; (2) determining the plating thickness of a metal film; (3) plating the metal film on a cladding layer of the fiber grating; (4) manufacturing a sensor; and (5) detecting double-hump signals. The invention provides a manufacturing method of a miniaturized, high integrated and high-sensitive film plated fiber grating liquid sensor capable of remotely measuring, and the SPR effect at the interface of the metal film and a liquid medium and the double-humped resonance effect of the fiber grating are effectively utilized. The sensor manufactured by using the method has high sensitivity on a detected liquid and has a measurement resolution up to 10<-7> on the liquid refractive index. Due to the integration of the advantages of the SPR effect, the double-humpedresonance effect and fiber grating sensing, the manufacturing method can be widely applied to manufacturing optical chemical sensors.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
A temperature sensing system with fiber Bragg grating
InactiveCN103759855BWith anti-electromagnetic interferenceCorrosion resistanceThermometers using physical/chemical changesGratingImaging lens
The invention provides a temperature sensing system with a fiber Bragg grating, which includes: a light source (1), a fiber optic circulator (2), one or more fiber optic FBG sensors (5), a coupler (6), an optical fiber (7), collimator lens (8), photorefractive holographic grating (9), focusing imaging lens (10), imaging device (11), processor (15). The present invention introduces the Fiber Bragg Grating (FBG grating for short) sensor into the field of temperature measurement, transmits information based on optical signals, has the advantages of anti-electromagnetic interference, anti-corrosion, high temperature resistance, high pressure resistance and long service life, and is stable Good, high sensitivity, high resolution, and simultaneous acquisition of all spectra from the same channel.
Owner:TAIYUAN UNIV OF TECH
Biochemical sensitive detector for surface plasma
ActiveCN101051025BPeak heightCurve peak full width at half maximum value is smallPhase-affecting property measurementsScattering properties measurementsPolarizerDigital converter
A biochemical sensing-detection device of surface plasma is composed of test bed, metal nanostructure substrate, semi-transmission semi-reflection mirror, polarizer, collimator, illumination optical fiber, light collection mirror, xenon-lamp light source, focusing mirror, monochromator, photoelectric multiplier tube, signal-treatment digital converter, biochemical sample to be detected, XY scanning bed, scan driving controller and computer. Its detecting method is also disclosed.
Owner:INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
A terahertz metamaterial sensor with complementary structure
ActiveCN109557050BSimple structureEasy to implementPhase-affecting property measurementsTerahertz metamaterialsRefractive index
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Thermal control multi-zone indium antimonide perfect wave absorber and application thereof
PendingCN114094345AHigh Refractive Index SensitivityRealize free tuningAntennasIndium antimonideRefractive index
The invention discloses a thermal control multi-wave-band perfect wave absorber and application thereof. The overall structure of the thermal control multi-wave-band perfect wave absorber is composed of three layers from top to bottom, the upper layer is a square bracket indium antimonide array which is periodically arranged, the middle layer is a SiO2 medium, and the lower layer is a metal layer. At room temperature, three perfect absorption peaks can be realized at the same time by reasonably setting geometric parameters of unit structures. According to the wave absorber of the invention, the pattern structure is simple, and the perfect absorption peaks can be freely tuned from 2 to 5. The sensitive characteristic of the semiconductor indium antimonide material to the temperature is utilized, and the temperature rise can enable the whole absorption peaks to show obvious red shift. The structure of the wave absorberhas relatively high temperature sensitivity (22 GHz / K), relatively small full width at half maximum (FWHM) (0.06 THz) and relatively high refractive index sensitivity (287 GHz / RIU). The thermal control multi-band indium antimonide perfect wave absorber has a wide application prospect in the aspects of thermal control filtering, thermal biosensing, thermal imaging, detection and the like.
Owner:ZHENGZHOU UNIV
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