33results about How to "High thermo-optic coefficient" patented technology

Methods and devices for optical beam steering are disclosed including coupling a laser light into an apparatus comprising a first substrate; an array of air core photonic crystal waveguides; columnar members etched around each air core waveguide; a pair of metal electrodes around the columnar members; a trench around the pair of metal electrodes surrounding each air core photonic crystal waveguide; a second substrate coupled to the first substrate comprising electrical interconnection lines; and a holographic fanout array comprising a third substrate; a photopolymer film coated on the third substrate; a hologram written in the photopolymer film configured to couple the laser light into the third substrate; and an array of holograms recorded in the photopolymer film configured to couple a portion of the laser light into the waveguides; and passing a current through the electrodes to induce a refractive index change in the first substrate to control the phase of the portion of the laser light that passes through each waveguide. Other embodiments are described and claimed.

An optical fiber based polymer core sensor includes an optical fiber having a core and an end having a cured polymer core affixed to the core of the optical fiber. The cured polymer core extends outward from the end of the optical fiber and has a diameter approximately equal to the core of the optical fiber. Note the cured polymer core can be substantially cylindrical, tapered or geometrically shaped. The optical fiber based polymer core sensor can be used to measure a temperature, measure a strain, measure a distance, measure a refractive index, detect or measure an analyte, detect a toxin, detect a biological agent, monitor a chemical process, or a combination thereof

The present invention is array waveguide grating of organic polymer and its making process. The array waveguide grating is made through the process of painting lower cladding polymer onto monocrystal silicon chip as substrate, stoving and painting polymer core layer material; stoving, evaporating or sputtering aluminum film, painting photoresist and photoetching through array waveguide grating mask; oxygen reacting ion etching to obtain array waveguide grating pattern on polymer core layer material; painting upper cladding polymer material and stoving to obtain array waveguide grating. The array waveguide grating device and its making process has easily control of refraction index difference between polymer core layer and cladding material, easy control of thickness of each layer, flexible selection of the core layer and the cladding material to realized optimized design.

The invention provides an SPR (Surface Plasmon Resonance) based photonic crystal fiber temperature sensor, which is provided with a liquid core located at the center of an optical fiber and metal coating channels symmetrically distributed around the liquid core in a sensing area, wherein the liquid core can be butted with a conventional single-mode optical fiber to perform long-range detection; dual metal coating channels are adopted, the diameter of air holes between the fiber core and the metal channels is reduced, the sensing strength is effectively enhanced, the signal to noise ratio is higher, and the resonance strength of the sensor can reach up to 327dB / cm; the fiber core and the two metal coating channels are filled with a liquid material with a high thermo-optical coefficient, andthe refractive index of the material is adjusted through adjusting the mixing proportion of the liquid material. The SPR based photonic crystal fiber temperature sensor is high in sensitivity, high in signal to noise ratio, simple in structure and tiny in volume, and specific light source bandwidth and signal strength requirements can be met within a certain range through adjusting the SPR strength and the resonant wavelength.

Methods and devices for optical beam steering are disclosed including coupling a laser light into an apparatus comprising a first substrate; an array of air core photonic crystal waveguides; columnar members etched around each air core waveguide; a pair of metal electrodes around the columnar members; a trench around the pair of metal electrodes surrounding each air core photonic crystal waveguide; a second substrate coupled to the first substrate comprising electrical interconnection lines; and a holographic fanout array comprising a third substrate; a photopolymer film coated on the third substrate; a hologram written in the photopolymer film configured to couple the laser light into the third substrate; and an array of holograms recorded in the photopolymer film configured to couple a portion of the laser light into the waveguides; and passing a current through the electrodes to induce a refractive index change in the first substrate to control the phase of the portion of the laser light that passes through each waveguide. Other embodiments are described and claimed.

The invention belongs to the field of organic / inorganic composite material synthesis and relates to preparation of azo polymer and functionalized graphene oxide series compounds, in particular to a preparation method and application of an NCO functionalized graphene / azo polymer composite waveguide thermo-optical material. The preparation method comprises the steps of firstly, preparing graphite oxide through a Hummers method, and obtaining graphite oxide dispersion liquid through ultrasonic peeling; then, making toluene diisocynate react with disperse red-19 containing two hydroxyl groups under the action of T-12, and obtaining azobenzene prepolymer with the end capped through hydroxy; subsequently, making IPDI react with the graphite oxide dispersion liquid, and preparing and obtaining isophorone diisocyanate functionalized graphite oxide; then, adding the graphite oxide to the obtained azobenzene prepolymer with the end capped through hydroxy for coducting a reaction, and finally obtaining the azo polyurethane / isophorone diisocyanate functionalized graphite oxide nanometer composite material. The material has a high thermo-optical coefficient (dn / dT) and can be applied to research of a novel digital thermo-optical switch which is low in driving power and high in response speed.

The invention discloses a heat-insensitive planar optical waveguide and a preparation method thereof. The planar optical waveguide comprises a substrate layer and a core layer, wherein the core layer is formed on the substrate layer. The planar optical waveguide further comprises an upper cladding wrapping the periphery of the core layer. The material of the upper cladding comprises an UV convergent fluorinated polymeric material. The materials of the substrate layer and the core layer are organic optical materials. The heat-insensitive planar optical waveguide provided by the invention has the advantages of small optical transmission loss and high capability in resisting electromagnetic waves and the like.

The invention discloses intelligent photochromic glass with plasmon broad-spectrum regulation and control functions. The intelligent photochromic glass is characterized in that each polymer molecular brush material layer (6) between a lower silver nano-wire electrode (31) and an upper silver nano-wire electrode (32) comprises an upper portion and a lower portion, the upper silver nano-wire electrodes (32) are connected with the upper sides of the upper portions of the polymer molecular brush material layers (6), and plasmon nano-particles (5) are connected with the lower sides of the upper portions of the polymer molecular brush material layers (6); the lower silver nano-wire electrodes (31) are connected with the lower sides of the lower portions of the polymer molecular brush material layers (6), and plasmon nano-particles (5) are connected with the upper sides of the lower portions of the polymer molecular brush material layers (6); spaces which are formed by the polymer molecular brush material layers (6) and the plasmon nano-particles (5) and are formed by the polymer molecular brush material layers (6) and silver nano-wire electrodes (3) are filled with transparent liquid (4); two ends of each peripheral driving circuit (7) are connected with the corresponding lower silver nano-wire electrode and the corresponding upper silver nano-wire electrode. The intelligent photochromic glass has the advantages that scattering spectra of the intelligent photochromic glass can be dynamically regulated from visible light wave bands to infrared wave bands, the intelligent photochromic glass is high in response speed and low in cost, processes for manufacturing the intelligent photochromic glass are simple, and the like.

The invention belongs to the field of polymeric nanocomposite material synthesis, and relates to preparation and application of an amino-functionalized graphene oxide / azo polymer composite waveguide material. The preparation comprises the following steps: firstly preparing azo chromophore 4-(4-nitro-alkenyl)phenyl-1,3-diamine from paranitroaniline and m-phenylenediamine, and then preparing a isocyano-terinated azobenzene prepolymer from NAPD and IPDI in the presence of T-12; afterwards ultrasonically exfoliating graphite oxide to obtain graphene oxide dispersion liquid, and reacting with quadrol under the action of 2-(7-azo benzo triazole)-N, N, N minute, N minute-tetramethyluronium hexafluorophosphate, so as to obtain amino-functionalized graphene oxide; adding the carbimide radical blocked azobenzene prepolymer into EAGO, and performing vacuum drying. A thermo-optical coefficient (dn / dT) of the prepared amino-functionalized graphene oxide / azo polymer composite waveguide material is greater than that of a common organic material and is more than 10 times that of a traditional inorganic material, and the composite waveguide material can be applied to the development of novel digital thermal optical switches with low drive efficiency and higher response speed.

The invention discloses a tunable mode converter and a manufacturing method thereof, and belongs to the technical field of planar optical waveguide devices. The tunable mode converter is based on an MZI optical waveguide structure. Along the propagation direction of light, the tunable mode converter is formed by an input few-mode straight waveguide, a 3-dBY branch beam splitter, a first input straight waveguide, a second input straight waveguide, a first 3-dBY branch beam splitter, a second 3-dBY branch beam splitter, four modulation arms, a first 3-dBY branch coupler, a second 3-dBY branch coupler, a first output straight waveguide, a second output straight waveguide, a 3-dBY branch coupler, an output few-mode straight waveguide and four parallel heating electrodes. The tunable mode converter comprises a silicon wafer substrate, a silicon dioxide lower cladding, an optical waveguide core layer with a strip-shaped structure and a polymer upper cladding 34 structure from bottom to top. The heating electrode is located right above the modulation arm, and the refractive index of the core layer material is higher than that of the upper cladding layer material. According to the invention, the modulation arm of the MZI structure is modulated to realize the purpose of mutual conversion of four optical modes.

The invention discloses an asymmetric MZI optical waveguide-based temperature sensor and preparation method thereof, and belongs to the technical field of planar optical waveguide sensors and preparation thereof. The whole sensor is based on an MZI optical waveguide structure, and consists of an input straight waveguide, a 3-dB Y branch beam splitter, a reference arm, a sensing arms parallel to the reference arm, and a 3-dB Y branch coupler in sequence from left to right, and consists of a silicon wafer substrate, a polymer lower coating layer prepared on the silicon wafer substrate and provided with a groove structure, an optical waveguide core layer prepared on the polymer lower coating layer and provided with an inverted ridge type waveguide structure, and a polymer upper coating layerprepared on the optical waveguide core layer in sequence from top to bottom. The waveguide type temperature sensor combines the advantages that the MZI optical waveguides are strong in interference effect and the organic polymer materials are large in thermos-optical coefficient; and through adopting two organic polymer materials with different thermo-optical coefficients for optical waveguide core layers of the sensing arms and the reference arms of the traditional ZMI waveguide temperature sensors, the aim of detecting the practical external environment temperature is achieved.

The invention discloses an organic-inorganic hybrid integrated thermo-optical modulation type grating and a preparation method thereof. The grating comprises a substrate layer which employs an inorganic optical material; a core layer which is formed on the substrate layer and comprises a first core layer and a second core layer alternatively arranged along a light spreading direction, wherein the first core layer employs an inorganic optical material, and the material of the second core layer comprises an ultraviolet convergent type fluorinated polymer material; an upper wrapping layer which is formed at the periphery of the core layer and employs a polymer material; and a heating electrode layer which is formed on the upper wrapping layer. The organic-inorganic hybrid integrated thermo-optical modulation type grating and the preparation method thereof can realize low-loss large-scope wavelength modulation.

The invention, which belongs to the technical field of a planar optical waveguide sensor and preparation thereof, provides an asymmetric MZI optical waveguide temperature sensor based on a loaded strip-shaped structure and a preparation method thereof. The asymmetric MZI optical waveguide temperature sensor comprises an input straight waveguide, a 3-dB Y-branch beam splitter, two asymmetric reference arm and sensing arm, a 3-dB Y-branch coupler and an output straight waveguide. The reference arm and the sensing arm include silicon substrates, lower polymer claddings with double-waveguide groove structures, reference arm optical waveguide core layers and sensing arm optical waveguide core layers, and unexposed and exposed organic-inorganic hybrid material flat plates, and upper polymer claddings that are arranged successively from bottom to top. According to the invention, with the organic-inorganic hybrid materials containing the chromophore molecules on the surface of the photo-bleaching sensor arm, the refractive index changes, the difference of the optical mode field with the environment change in light transmission of two interference arms is increased further, and the output light intensity change is increased. Therefore, the sensor has an important practical application value.

The invention discloses a double-solid-core optical fiber photo-thermal phase modulator coated with a heat-sensitive material, and belongs to the technical field of optical fiber phase modulation. Thedouble-solid-core optical fiber photo-thermal phase modulator is formed by sequentially connecting a signal light source, a pump light source, a 3dB coupler, a circulator, a single-mode optical fiber, a section of double-solid-core optical fiber and a detector. The single-mode optical fiber and the double-solid-core optical fiber are directly aligned and welded, light in the single-mode optical fiber is coupled into two fiber cores of the double-solid-core optical fiber by utilizing a fused biconical taper technology at a welding spot, and a Michelson interferometer is formed by utilizing reflection of the end surfaces of the fiber cores. The cladding near one fiber core of the double-solid-core optical fiber is polished by using a wheel type side polishing technology, so that the fiber core is exposed in the air. In order to increase the modulation degree of the phase modulator, the fiber core with the polished side surface is coated with a heat-sensitive material. The phase modulator is simple to manufacture and easy to be interconnected with a single-mode optical fiber, and the two fiber cores are arranged in one waveguide, so that the modulator is high in integration degree, and the response is approximately linear. The modulator can be widely applied to the aspect of phase modulation.

The invention relates to an optical modulator. The optical modulator comprises a substrate, a first electrode, a second electrode, a waveguide and a heat-inducing layer, wherein the first electrode, the second electrode and the waveguide are arranged on the same surface of the substrate at intervals; one end of the heat-inducing layer is connected with the first electrode, and the other end of theheat-inducing layer is connected with the second electrode; sequentially arranged through holes are arranged on the waveguide along an optical transmission direction; the heat-inducing layer at leastcovers the through holes, and the heat-inducing layer is used for converting electric energy of an external electric field into heat energy, so that the temperature of each of the heat-inducing layerand the temperature of the waveguide is increased, the refractive indexes of the waveguide and the heat-inducing layer or the waveguide are changed, the intensity of light transmitting through the waveguide is changed, and the regulation and control of a light spectrum are realized. The optical modulator disclosed by the invention has high modulation depth, small device area, and less energy consumption.

The invention belongs to the field of polymeric nanocomposite material synthesis, and relates to preparation and application of an amino-functionalized graphene oxide / azo polymer composite waveguide material. The preparation comprises the following steps: firstly preparing azo chromophore 4-(4-nitro-alkenyl)phenyl-1,3-diamine from paranitroaniline and m-phenylenediamine, and then preparing a isocyano-terinated azobenzene prepolymer from NAPD and IPDI in the presence of T-12; afterwards ultrasonically exfoliating graphite oxide to obtain graphene oxide dispersion liquid, and reacting with quadrol under the action of 2-(7-azo benzo triazole)-N, N, N minute, N minute-tetramethyluronium hexafluorophosphate, so as to obtain amino-functionalized graphene oxide; adding the carbimide radical blocked azobenzene prepolymer into EAGO, and performing vacuum drying. A thermo-optical coefficient (dn / dT) of the prepared amino-functionalized graphene oxide / azo polymer composite waveguide material is greater than that of a common organic material and is more than 10 times that of a traditional inorganic material, and the composite waveguide material can be applied to the development of novel digital thermal optical switches with low drive efficiency and higher response speed.

An optical fiber based polymer core sensor includes an optical fiber having a core and an end having a cured polymer core affixed to the core of the optical fiber. The cured polymer core extends outward from the end of the optical fiber and has a diameter approximately equal to the core of the optical fiber. Note the cured polymer core can be substantially cylindrical, tapered or geometrically shaped. The optical fiber based polymer core sensor can be used to measure a temperature, measure a strain, measure a distance, measure a refractive index, detect or measure an analyte, detect a toxin, detect a biological agent, monitor a chemical process, or a combination thereof.

The invention provides an SPR-based photonic crystal fiber temperature sensor, which has a liquid core located in the middle of the optical fiber and metal coating channels symmetrically distributed around the liquid core in the sensing area. The liquid core can be docked with conventional single-mode optical fiber for long-distance detection; the dual metal coating channel is used, and the diameter of the air hole between the fiber core and the metal channel is reduced, which effectively enhances the sensing intensity, the signal-to-noise ratio is stronger, and the sensor resonates The intensity can reach up to 327dB / cm; the fiber core and the two metal coating channels are filled with a liquid material with a high thermo-optic coefficient, and the refractive index of the material is adjusted by adjusting the mixing ratio of the liquid material. The SPR-based photonic crystal fiber temperature sensor of the present invention has high temperature sensitivity, high signal-to-noise ratio, simple structure, and small size, and can meet specific light source bandwidth and signal intensity requirements within a certain range by adjusting SPR intensity and resonance wavelength.

The invention discloses a preparation method of a film with a photonic device structure, and the method comprises the steps: fixing a polyimide film on a platform capable of spatial displacement, focusing ultrafast laser into the polyimide film, and carrying out the etching, thereby obtaining the film with the photonic device structure. The preparation method has the advantages that the processing technology is simple, compatibility with an existing technology is easy to achieve, and manufacturing of a large-area and high-complexity photoelectric integrated device can be achieved; by regulating and controlling the ultrafast laser processing structure, the core layer can be directly written in the polymer, and the preparation process is simplified. According to the thin film obtained by adopting the preparation method disclosed by the invention, the refractive index can be accurately adjusted in a relatively large range, different application requirements can be met, the birefringence effect is small, and the optical loss is low; and in the production process, the optical waveguide material can be doped in a memorial manner or modified from the molecular level, so that the optical waveguide material has gain and photoelectric effects, and functionalization of an optical waveguide device is realized.

The invention discloses a wavelength division multiplexing system with a power balancing function and a preparation method thereof, and belongs to the technical field of silicon dioxide / polymer mixed waveguide optical integrated chips. The multi-channel wavelength division multiplexer and the variable optical attenuator array are integrated on the same chip, a wide-spectrum light source is coupled into the wavelength division multiplexer, and light with different wavelengths is divided into different channels through the wave division effect of the wavelength division multiplexer and then enters different variable optical attenuators; because the power among the channels of the wavelength division multiplexer is unbalanced, the power balance of the output channels can be realized by tuning the variable optical attenuator. According to the wavelength division multiplexing system with the power balancing function, the silicon dioxide / polymer mixed waveguide PLC technology is adopted, and the power consumption of the system is reduced by utilizing the advantages that the silicon dioxide lower cladding is good in heat dissipation and low in loss and the thermo-optical coefficient of the polymer core layer and the polymer upper cladding is large. The method is very suitable for the fields of optical communication, optical calculation and the like, and has a very strong application prospect.

The invention provides an MEMS thermo-optical tunable filter with low optical loss. The MEMS thermo-optical tunable filter comprises a multi-cavity optical interference film filter layer with a half-wave resonant cavity made from an AlN or GaN thermo-optical adjustable medium film material, and a microwave heater, and the central wavelength of the MEMS thermo-optical tunable filter can be adjusted by controlling the working current of the microwave heater. According to the MEMS thermo-optical tunable filter provided by the invention, AlN or GaN is used as the cavity body material of the half-wave resonant cavity in the optical interference film, and has a higher thermo-optical coefficient and a lower extinction coefficient, so that the optical loss of the narrowband tunable filter can be greatly reduced. The MEMS thermo-optical tunable filter provided by the invention can be used for effectively solving the problems that an existing MEMS thermo-optical tunable filter has high optical loss and the filtering waveform cannot satisfy the application, and has good application prospects in the fields of optical communication and optical sensing.

The present invention is a metal plasmon patch type temperature and infrared sensor device. There is a flexible polymer molecular brush material layer (2) on the surface between the upper and lower flexible transparent substrates (5). The outer end of the molecular brush material layer (2) is connected with metal nanoparticles (3), and two layers of metal nanoparticles (3) arranged in opposite directions and the flexible polymer molecular brush material layer (2) form a unit structure, which can be Repeat multiple layers, the flexible transparent film (1) is located around the above structure, the transparent liquid (4) is filled between the flexible polymer molecular brush material layer (2) and the flexible transparent film (1), and the patch (6) is located on the bottom flexible The transparent film (1) is under and closely attached to the flexible transparent film (1). The invention can directly observe the luminous color of the patch temperature sensor with human eyes or take pictures with a camera, is suitable for objects with regular and irregular surfaces, has large measurement area, anti-electromagnetic interference, fast response and low cost.

A tunable mode converter and a manufacturing method thereof belong to the technical field of planar optical waveguide devices. Along the direction of light propagation, there are input few-mode straight waveguide, the first 3‑dB Y branch beam splitter, the first input straight waveguide, the second input straight waveguide, the second 3‑dB Y branch splitter, the third 3‑dB dB Y-branch splitter, four modulation arms, second 3-dB Y-branch coupler, third 3-dB Y-branch coupler, first output straight waveguide, second output straight waveguide, first 3-dB Y-branch Coupler, output few-mode straight waveguide, and four parallel heating electrodes; from bottom to top, it is a silicon wafer substrate, a silicon dioxide lower cladding layer, a strip-shaped optical waveguide core layer, and a polymer upper cladding structure; heating The electrodes are located directly above the modulation arms, and the core material has a higher refractive index than the upper cladding material. The invention achieves the purpose of mutual conversion of four optical modes by modulating the modulation arm of the MZI structure.

The invention belongs to the field of organic / inorganic composite material synthesis and relates to preparation of azo polymer and functionalized graphene oxide series compounds, in particular to a preparation method and application of an NCO functionalized graphene / azo polymer composite waveguide thermo-optical material. The preparation method comprises the steps of firstly, preparing graphite oxide through a Hummers method, and obtaining graphite oxide dispersion liquid through ultrasonic peeling; then, making toluene diisocynate react with disperse red-19 containing two hydroxyl groups under the action of T-12, and obtaining azobenzene prepolymer with the end capped through hydroxy; subsequently, making IPDI react with the graphite oxide dispersion liquid, and preparing and obtaining isophorone diisocyanate functionalized graphite oxide; then, adding the graphite oxide to the obtained azobenzene prepolymer with the end capped through hydroxy for coducting a reaction, and finally obtaining the azo polyurethane / isophorone diisocyanate functionalized graphite oxide nanometer composite material. The material has a high thermo-optical coefficient (dn / dT) and can be applied to research of a novel digital thermo-optical switch which is low in driving power and high in response speed.

The invention belongs to the field of organic synthesis, relates to a preparation of chirality azo benzene compounds, and in particular to a preparation method and an application of a chirality azo polyurethane thermal-optic material. Diatomic alcohol 4, 4'-di (6-hydroxyhexyloxy) biphenyl (shown as 6BP) which contains a biphenyl structure and isophorone diisocyanate (IPDI) are utilized to be reacted with a catalyst of dibutyltin dilaurate, polyurethane preformed polymer of isocyanic acid root end capping is prepared; and preformed polymer is reacted with hydroxy azo benzoic acid borneol ester (shown as AZO) to prepare the chirality azo polyurethane thermal-optic material. The preparation process is simple, chromophore molecule containing chirality carbon atom is induced into polyurethane, so that central asymmetry of a polyurethane material is realized, and non-linearity property of the polyurethane material is improved; and meanwhile, when polyurethane is prepared, the alcohol biphenyl-typed glycol is selected, thermal stability of the material is improved by the induction of rigidity groups, and the possibility of researching on a novel digital thermal-optic switch which is provided with low driving power is provided.

The invention discloses a heat-insensitive planar optical waveguide and a preparation method thereof. The planar optical waveguide comprises a substrate layer and a core layer, wherein the core layer is formed on the substrate layer. The planar optical waveguide further comprises an upper cladding wrapping the periphery of the core layer. The material of the upper cladding comprises an UV convergent fluorinated polymeric material. The materials of the substrate layer and the core layer are organic optical materials. The heat-insensitive planar optical waveguide provided by the invention has the advantages of small optical transmission loss and high capability in resisting electromagnetic waves and the like.

The invention discloses a silicon dioxide and polymer combined and integrated optical waveguide type thermal-optical modulator. The thermal-optical modulator comprises an input waveguide, an input connecting waveguide, a 1*2 optical power splitter, a first tapered waveguide, a transmission arm, a second tapered waveguide, a 2*1 combiner, an output connecting waveguide and an output waveguide. Input light passes through the input waveguide and is connected with one end of the 1*2 optical power splitter through the input connecting waveguide, the 1*2 optical power splitter generates interference, and two split light beams with the ratio of 1:1 are obtained. One end of the 1*2 optical power splitter is connected with one end of the transmission arm through the first tapered waveguide, the other end of the transmission arm is connected with one end of the 2*1 combiner through the second tapered waveguide, and the other end of the 2*1 combiner is connected with the output waveguide through the output connecting waveguide. The thermal-optical modulator has the advantages of being compact in structure, easy to manufacture and insensitive to wave length; meanwhile, the manufacturing process of polymer optical waveguides is simple, and therefore the process difficulty of the thermal-optical modulator is lowered.