1063 results about "Optical spectrum analyzer" patented technology

A fluid sampling and analysis system. The system comprises a fluid handling network including a patient end configured to maintain fluid communication with a bodily fluid of a patient; a sample analysis chamber accessible by the fluid handling network; 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; a sample draw mode in which the pump unit is operable to draw a sample of bodily fluid from the patient through the patient end, and provide a portion of the sample to the sample analysis chamber; and an optical calibration mode in which the pump unit is operable to supply calibration fluid to the sample analysis chamber. The system further comprises a spectroscopic analyzer configured to obtain spectra of the contents of the sample analysis chamber; a processor in communication with or incorporated into the spectroscopic analyzer; and stored program instructions executable by the processor to obtain a measurement of one or more analytes in the portion of the sample from the spectra.

An optical spectrum analyzer comprises a diffraction grating (DG), a polarization decomposing unit (PDM) for decomposing the input light beam into first and second light beams having mutually-perpendicular linear states of polarization, and two output ports (FP2 / 1, FP2 / 2) each for receiving from the grating, substantially exclusively, a respective one of the polarized light beams (LT, LR) after diffraction by the diffraction grating (DG). Each of the linearly-polarized light beams is directed onto the diffraction grating with its linear state of polarization at any prescribed angle to a corresponding plane of diffraction of the diffraction grating The arrangement is such that the state of polarization of the light beams, at any particular wavelength within an operating band of the analyzer remains substantially unchanged with respect to time, The analyzer also may have a reflector (RAM) for reflecting the light beams leaving the diffraction grating after diffraction a first time so as to return them to the diffraction grating for diffraction a second time.

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 was originally developed to determine the strain-relief capability of a fusion splice protector as well as the compressive stress imparted to a fusion splice by the splice protector. The invention also permits performance and comparative analyses of splice protectors as well as any package in which the optical fiber is at least partially disposed. To those ends a fiber Bragg grating (FBG) is axially arranged relative to the package such that a free or reference section of the FBG protrudes from the package while a shielded section lies within the package. Broadband light is supplied to the FBG which reflects certain wavelengths that are measured by an optical spectrum analyzer. The FBG reflected spectra will be split into two peaks as the reference and shielded sections experience different amounts or types of stress thereby providing a powerful analysis tool. A wavelength shift in the reflected spectra reveals the amount of stress experienced by the reference and free sections and permits a qualitative and quantitative analysis of the stress applied by the package and the package's ability to protect fiber from stress (e.g. such as that imposed by a tension pull test). Measurements may be made after a variety of conditions are changed such as splice protector curing, axial tension application, axial tension release, time, and age accelerating environments. Comparative studies and various other calculations may also be performed to evaluate different packages.

The invention comprises an apparatus and method for simple fluorescence spectrometry in a down hole environment. The apparatus and method utilization of two UV light bulbs and an optically clear UV coupler and a fluid containment system. The optically clear UV coupler and fluid containment system are made of sapphire. The apparatus is attached in a manner that enables light transmitted from a light source on the far side of the fluid containment system to pass through a pathway in a plate holding the UV bulbs. UV light illuminates the fluid, which in turn fluoresces light. The fluoresced light is transmitted back towards the UV bulb mount and through the pathway towards an optical spectrum analyzer.

A non-invasive blood constituents measuring instrument measures blood constituent values including blood glucose concentration in a living body non-invasively. The instrument is composed of a light source 11 to irradiate a light containing plural wavelengths to a living body 13, a light receiver 14 to detect the light transmitted through a living body or reflected and scattered thereon, a 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.

A Raman spectroscopy system includes a laser source for providing a laser beam, and an optical probe assembly including a photonic crystal fiber light guide for receiving the laser beam from the laser source and for directing the laser beam toward a specimen of selected material, a lens for receiving the laser beam in the light guide and directing the beam onto the specimen and for receiving reflected light from the specimen and directing the reflected light back through the fiber light guide, and a dichroic beam splitter for directing a portion of the reflected beam out of the optical probe assembly. The system further includes an optical spectrum analyzer for receiving the portion of the reflected beam and for exhibiting a Raman signature of the specimen.