1055 results about "Optical spectrum analyzer" patented technology

An apparatus includes a single or dual output port, dual-drive Mach-Zehnder Interferometer configured to generate a first optical signal in one path, and to generate a second optical signal in a different path. The apparatus also includes an optical spectrum analyzer configured to receive output from at least one port of the dual-drive Mach-Zehnder Interferometer. A method includes causing radio frequency signals from two different antennae to modulate an optical carrier at a corresponding drive of a dual-drive Mach-Zehnder Interferometer, and causing output from at least one port of the Mach-Zehnder Interferometer to be directed to an optical spectrum analyzer. The method further comprises determining arrival angle at each of a plurality of frequencies in the radio frequency signals based on output from the optical spectrum analyzer.

The invention provides a laser spectrum analyzer combining a confocal micro-Raman spectrometer with a laser-induced breakdown spectrometer (LIBS). The analyzer comprises a micro-Raman system, a micro LIBS system, a high resolution micro-imaging system, a confocal micro-light path, and a spectrum receiving system with a time resolution function, and automatically switches into a white light micro-imaging observation mode, an automatic focusing mode, a LIBS spectrum working mode, and a Raman spectrum working mode. The significant characteristics of the invention are that compact combination of Raman with LIBS is realized by a micro confocal system; qualitative and quantitative analysis of substance elements at the same minimal position and molecular structure is realized; with the high-resolution imaging function, element spatial discrimination and substance structure chemical analysis can be carried out in micrometers so as to obtain complete information of spatial distribution images of chemical elements, substance structure and physical conditions of a sample.

The invention discloses a laser cleaning system based on robot control and a cleaning method thereof. The laser cleaning system comprises a computer system, a laser, a protective cover, a sensing system, a light beam shaping system, a waste processor, an optical spectrum analyzer and a workpiece to be cleaned, and further comprises a robot, wherein the laser and the robot are both connected with the computer system; the light beam shaping system is connected with the laser through an optical fiber; the sensing system and the light beam shaping system are both fixed in the protective cover; the sensing system is connected with the computer system; the protective cover is fixed on a robot arm; and the optical spectrum analyzer is connected with the computer system. The laser cleaning system and cleaning method can clean workpieces to be cleaned with any size and random shapes, can analyze cleaning results in real time to realize closed-loop control, judge the cleaning effect through image processing and optical spectrum analysis, and are accurate in judgment and excellent in cleaning effect; and the robot automated control improves the system adaptability and stability.

An apparatus for analyzing the composition of bodily fluid. The apparatus comprises a fluid handling network including a patient end configured to maintain fluid communication with a bodily fluid in a patient; and a pump unit in operative engagement with the fluid handling network. The pump unit has an infusion mode in which the pump unit is operable to deliver infusion fluid to the patient through the patient end, and a sample draw mode in which the pump unit is operable to draw a sample of the bodily fluid from the patient through the patient end. The apparatus further comprises a spectroscopic analyzer positioned to analyze at least a portion of the sample; a processor in communication with or incorporated into the spectroscopic analyzer; and stored program instructions executable by the processor to obtain measurements of two or more properties of the sample. In one implementation, the pump unit comprises a first pump operable in the infusion mode but not in the sample draw mode, and a second pump operable in the sample draw mode but not in the infusion mode.

The invention relates to a micro-structure fiber optic Fabry-Perot cavity quasi based quasi-distributed sensor, which comprises a broadband light source (1), a fiber optic circular (2), a plurality of sensor units (3), a sensor-based optical fiber (4), an optical spectrum analyzer (5) and a data processor (6), wherein each sensor unit (3) is a micro-structure fiber optic Fabry-Perot cavity, and the sensor units are connected in series and are integrated on the sensor-based optical fiber (4); and three ports of the fiber optic ring device (2) are respectively connected with the broadband light source (1), the sensor-based optical fiber (4) integrating all sensor units, and the optical spectrum analyzer (5), and the optical spectrum analyzer (5) is connected with the data processor (6). The micro-structure fiber optic Fabry-Perot cavity quasi based quasi-distributed sensor has the advantages of large sensing capacity, simple structure, low cost, wide application prospect and the like.

A method and apparatus is disclosed for measurement and monitoring of in-band optical signal to noise ratio (OSNR). A two channel optical spectrum analyzer (OSA) is advantageously applied in acquiring wavelength division multiplex (WDM) signal data after it has been split according to polarization, then deriving the in-band OSNR from acquired data due to its narrow bandwidth, selective spectral shape, and capability to analyze two components of a polarized signal simultaneously. The in-band OSNR can be measured without interrupting optical transmission traffic in the network.

The invention comprises an apparatus and method for simple fluorescence spectrometry in a downhole environment using a UV light source and UV fluorescence to determine a parameter of interest for a sample downhole. The UV light source illuminates the fluid, which in turn fluoresces light. The fluoresced light is transmitted back towards the UV light source and through the pathway towards an optical spectrum analyzer. API gravity is determined by correlation the wavelength of peak fluorescence and brightness of fluorescent emission of the sample. Asphaltene precipitation pressure is determined by monitoring the blue green content ratio for a sample under going depressurization.

The invention provides a three-dimensional microscale measuring device and method based on a four-core fiber grating, and belongs to the technical field of precision instrument manufacturing and measurement. The device comprises a broadband light source, an optical spectrum analyzer, an optical circulator, a control computer, a multi-way optical switch and an external reference grating. The multi-way optical switch is communicated with a four-core fiber fan-out device through four single mode fibers. One end of a four-core fiber is connected to the four-core fiber fan-out device. A four-core fiber grating probe is fixedly installed at the other end of the four-core fiber through a probe clamp holder. The four-core fiber and the four-core fiber grating probe are connected to form a closed circuit. According to the method, the multi-way optical switch is controlled by the control computer to switch optical paths, the optical spectrum analyzer is used for measuring reflectance spectra of the fiber gratings, and three-dimensional microscale measuring without temperature coupling is realized by utilizing a differential data processing algorithm. The three-dimensional microscale measuring device and method based on the four-core fiber grating have the advantages that accuracy is high, contact force is small, the device and method are not affected by the masking effect, and the service life of the probe is long.

A non-invasive blood constituents measuring instrument measures blood constituent values including blood glucose concentration in a living body. The instrument is composed of a light source 11 to irradiate a light containing plural wavelengths to a living body 13, a light detector 14 to detect the light transmitted through a living body or reflected thereon, an instantaneous spectrum analyzer 15 to analyze the light transmitted through the living body or reflected thereon at different times, a subtraction processor 18 to generate spectrum subtraction from the spectrum of the light at the different times measured by the spectrum analyzer 15, and a blood glucose concentration predictor 21 into which the output data of the subtraction processor 18 are input and which outputs a blood constituent value.

An integrated chromatography-immunoassay system for integrated chromatography-immunoassay system includes a chromatographic unit that receives labeled nano-structured probes comprising nano particles and antibodies attached to the nano particles, and a test membrane comprising coating antigens. The chromatographic unit allows the labeled nano-structured probes to diffuse there through and into the test membrane, wherein the antibodies on the nano particles are bound to the coating antigens. A laser device emits a laser light to illuminate the labeled nano-structured probes having the antibodies bound to the coating antigens on the test membrane. A spectral analyzer obtains a Raman spectrum from light scattered from the labeled nano-structured probes having the antibodies bound to the coating antigens on the test membrane, and to identify a spectral signature in the Raman spectrum associated with the antibody-antigen pair, which enables detection and identification of the antibody.

The invention discloses a quick-response conical micro-nano optical fiber humidity sensor and a preparation method thereof. The humidity sensor comprises a broadband light source, a conical micro-nano optical fiber structure and an optical spectrum analyzer which are sequentially connected, wherein the conical micro-nano optical fiber structure comprises a conical waist region and two conical transitional regions which are positioned at two ends of the conical waist region; the two conical transitional regions are connected with the broadband light source and the optical spectrum analyzer through a standard optical fiber respectively. The method comprises the following steps of: (1) removing a coating layer of a double-clad optical fiber to remain a bare optical fiber containing a fiber core, an inner cladding layer and an outer cladding layer; (2) fusing two ends of the bare optical fiber with the standard optical fiber through an optical fiber welding machine respectively; (3) performing fused biconical taper on the bare optical fiber to obtain the conical micro-nano optical fiber structure; (4) connecting the standard optical fiber of which the two ends are fused with the broadband light source and the optical spectrum analyzer to form the conical micro-nano optical fiber humidity sensor. The quick-response conical micro-nano optical fiber humidity sensor has a simple optical fiber structure, and is high in response speed, wide in measurement range and high in detection sensitivity.

The invention discloses an ultra-high-precision freezing detecting device and a real-time freezing thickness detecting method thereof. The ultra-high-precision freezing detecting device comprises a wideband light source, a spectrum analyzer, an optical fiber coupler, a film-coated optical fiber, an optical fiber polarization controller, an optical switch and optical fiber probes. The wideband light source and the spectrum analyzer are connected to a port a and a port b which are located on the same side of the optical fiber coupler through optical fibers respectively. The film-coated optical fiber is installed on the optical fiber polarization controller and connected to a port c located on the other side of the optical fiber coupler. The input end of the optical switch is connected to a port d of the optical fiber coupler and the output end of the optical switch is connected with the optical fiber probes. The ultra-high-precision freezing detecting device can realize ultra-high-precision detection of a micrometer-level-thickness ice layer on the surface of an object and accurately forecast the freezing rate. In addition, the device is high in integration degree, low in cost, capable of realizing distributed real-time detection, particularly suitable for airplane freezing detection, capable of realizing safety early warning and capable of being widely applied to other fields in need of freezing condition detection or monitoring.

A BOTDA system that combined optical pulse coding techniques and coherent detection includes a narrow linewidth laser, two polarization-maintaining couplers, microwave generator, two electro-optic modulators (EOMs), fiber under test, an optical circulator, a 3 dB coupler, a polarization scrambler, a pulse generator, a balance photodetector, an electrical spectrum analyzer, digital signal processing unit and a frequency shifter. The optical pulse coding techniques and coherent detection are simultaneously used in the invented system, which can be enhance the signal-to-noise ration (SNR), the measuring accuracy and the sensing distance of BOTDA. Moreover, the proposed system has the capacity of break interrogation.

An X-ray multiple spectroscopic analyzer includes an X-ray source, an optical system inputting X-rays to a single-crystal sample, a sample stage supporting the single-crystal sample, an X-ray diffraction detector, a rotation driving system that changes the angle of the X-ray diffraction detector, an X-ray diffraction measurement data storage unit, a structural analysis data analyzing unit, an energy-dispersive X-ray fluorescence detector, an X-ray fluorescence measurement data storage unit, an X-ray fluorescence analyzing unit, an X-ray fluorescence analysis data storage unit, and X-ray fluorescence analysis data acquiring unit. The structural analysis data analyzing unit analyzes the data of the crystal structure further on the basis of the analysis data of the fluorescent X-rays output from the X-ray fluorescence analysis data acquiring unit.

An optical sensor is provided. The sensor includes an optical fiber having a free extremity on which a polymer layer is deposited normal to the longitudinal axis. A light source injects a analytical light beam in the fiber, which is reflected by the polymer layer. The reflected beam is analyzed by a spectrum analyzer, which determines the thickness of the polymer layer based on the Fabry-Perot effect. This thickness is related to a substance to be detected. An optical nose made from a plurality of such sensors is also provided, and may be used to detected a variety of substances.

A method for detecting an ingredient in a food product includes establishing a spectral signature in a Raman spectrum obtained from a chemical substance; allowing a food sample solution obtained from a food product to come to contact with a first nano-scale surface structure in a first sensor, wherein the first sensor comprises a substrate, wherein the nano-scale surface structure comprises a plurality of columns over the substrate or a plurality of holes in the substrate; illuminating the food sample solution and the first nano-scale surface structure on the first sensor by a laser beam; scattering the laser beam by the food sample solution and the first nano-scale surface structure to produce a scattered light; obtaining a first Raman spectrum from the scattered light using a spectral analyzer; and identifying the spectral signature in the first Raman spectrum to determine the existence of the chemical substance in the food product.

An integrated chromatography-immunoassay system for integrated chromatography-immunoassay system includes a chromatographic unit that receives labeled nano-structured probes comprising nano particles and antibodies attached to the nano particles, and a test membrane comprising coating antigens. The chromatographic unit allows the labeled nano-structured probes to diffuse there through and into the test membrane, wherein the antibodies on the nano particles are bound to the coating antigens. A laser device emits a laser light to illuminate the labeled nano-structured probes having the antibodies bound to the coating antigens on the test membrane. A spectral analyzer obtains a Raman spectrum from light scattered from the labeled nano-structured probes having the antibodies bound to the coating antigens on the test membrane, and to identify a spectral signature in the Raman spectrum associated with the antibody-antigen pair, which enables detection and identification of the antibody.

The invention belongs to the technical field of precision instrument manufacture and measurement and provides a two-dimensional microscale measuring device and method based on double fiber bragg gratings. The device comprises a wideband light source, a spectrum analyzer, an optical circulator, a control computer, a multiplex photoswitch and an external reference grating. The multiplex photoswitch is communicated with a double-fiber-bragg-grating probe through a single mode optical fiber a and a single mode optical fiber b respectively. The upper end of the double-fiber-bragg-grating probe is fixed through a probe clamping device, the single mode optical fiber a and the single mode optical fiber b are connected with the double-fiber-bragg-grating probe to form a channel. The method comprises the following steps that the control computer controls the multipath photoswitch to switch optical paths, the spectrum analyzer is utilized to respectively measure reflectance spectrums of the fiber bragg gratings, and two-dimensional microscale measurement of non-temperature coupling is achieved by utilizing the differential data processing algorithm. The two-dimensional microscale measuring device and method based on the twin-core fiber bragg grating have the advantages of being high in precision, small in contact force and not influenced by the shadowing effect. In addition, the service life of the probe is long.

The invention relates to a multichannel low-stray-light spectrograph based on an area array detector, belonging to the field of spectral analysis instruments. The spectrograph comprises an optical platform and a light signal acquisition device, and is characterized in that the area array detector serves as the optical platform; a plurality of band-rejection filters are processed and formed along the spectrum distribution direction on the window of one channel by using an imaging film-coating method; the condition of the change of the stray light received by each area of the detector is measured in real time; and by using the channel as a reference channel, the stray light of the whole spectral analysis instrument is efficiently corrected in real time. By using the spectrograph provided by the invention, the measured stray light in a full-wave band scope of a spectral analysis system is efficiently corrected. The multichannel low-stray-light spectrograph can be applied to measuring various photo-chromic parameters, such as spectrum characteristics, absorbance value, and the like of a to-be-measured sample.