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US20100296103 |
OPTICAL MICRORESONATOR
An optical microresonator system and a sensor are disclosed. The optical microresonator system includes an optical waveguide and an optical microresonator that is directly optically coupled to the...
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US20110176143 |
RESONATOR LENGTH MEASUREMENT
The invention provides a method and system for measuring the length of a reflective resonator, by analyzing an electromagnetic spectrum emitted therefrom. The emitted spectrum is used for...
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US20110277548 |
FIBER OPTIC PARTICLE MOTION SENSOR AND MEASURING METHOD USING THE SENSOR
An optical sensor in which acceleration, acoustic velocity, or displacement (vibration) causes a corresponding shift in the center wavelength of the sensor output. The sensor can be coupled to a...
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US20070291275 |
Side-viewing optical acoustic sensors and their use in intravascular diagnostic probes
One aspect of the invention provides side-sensing optical fiber-based optical acoustic sensors that are well suited to catheter-based intravascular diagnostic applications. Another aspect of the...
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US20110172959 |
MULTI-GAP INTERFEROMETRIC SENSORS
An apparatus for estimating a property includes a hollow core tube and an input light guide disposed at least partially within hollow core tube. The apparatus also includes a second gap disposed...
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US20080186506 |
Transducer for measuring environmental parameters
Apparatus, methods, and other embodiments associated with measuring environmental parameters are described herein. In one embodiment, a transducer comprises a tube, an elongated member, a first...
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US20110064419 |
OPTICAL DEVICE AND METHOD FOR OPTICAL FREQUENCY MODULATION TO OPTICAL AMPLITUDE MODULATION CONVERSION
An optical device comprising an optical device comprising a Mach-Zehnder interferometer having a first 2×2 optical coupler, a second 2×2 optical coupler, a first optical arm, and a second optical a...
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US20070223000 |
Optical Sensor
An optical sensor having a sapphire body is disclosed. A hollow in the sapphire body defines a surface which is used as a surface of a Fabry-Perot cavity. Interferometry is used to detect changes...
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US20110102803 |
IN-LINE SINGLE FIBER MACH-ZEHNDER INTERFEROMETER
A single fiber Mach-Zehnder interferometer comprises an optical fiber having a core region and a cladding surrounding the core region, and a micro-cavity having part of the cladding and the core...
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US20100085573 |
SPLIT FREQUENCY SENSING METHODS AND SYSTEMS
Resonant sensors and molecule detection methods utilizing split frequency. Optical energy is introduced into a microcavity, such as a toroid-shaped or spherical microcavity. A portion of the...
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US20080304076 |
SYSTEMS AND METHODS FOR PACKAGING AND MOUNTING READOUT AND LASER INTENSITY MONITOR SENSORS
Methods and apparatus for applying sensors to a ring laser gyro. An example apparatus includes a housing having a cavity, a laser intensity monitor (LIM) sensor mechanically and electrically...
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US20100007893 |
Push-pull two wavelength fabry perot sensor for fiber optic acoustic sensor arrays
Two optical wavelengths are used to interrogate a fiber optic Fabry-Perot sensor having a moveable diaphragm that changes the width of a gap between two reflective surfaces. By picking the right...
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US20110102804 |
PASSIVELY-THERMALLY-STABILIZED PHOTONIC APPARATUS, METHOD, AND APPLICATONS
Apparatus and methods that compensate for the thermally-induced drift of the resonance frequency of a closed-loop resonator include, in an exemplary embodiment, a waveguide-based Mach-Zehnder...
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US20050231728 |
Q-point stabilization for linear interferometric sensors using tunable diffraction grating
A linear interferometric sensor system in which the light output from the interferometric sensor is optically bandpass filtered before conversion to an electrical signal by an adjustable...
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US20050151975 |
Fabry-perot fiber optic sensing device and method
The invention provides a device and a method for measuring a physical parameter. The device comprises a Fabry-Perot interferometer coupled to a polychromatic light source via fiber optic means....
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US20090279099 |
METHOD FOR FABRICATING A SENSOR, A SENSOR, AND A METHOD FOR SENSING
A method for fabricating a sensor, a sensor so fabricated, and a method for sensing a stimulus are provided. The method includes providing an elongated open channel, such as, a V-groove, in a...
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US20080043245 |
Methods and apparatus for measuring multiple fabry-perot gaps
Apparatus, methods, and other embodiments associated with measuring multiple Fabry-Perot gaps to determine environmental parameters are described herein. In one embodiment, a system for measuring...
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US20110069318 |
TRANSDUCER FOR MEASURING ENVIRONMENTAL PARAMETERS
Apparatus, methods, and other embodiments associated with measuring environmental parameters are described herein. In one embodiment, a transducer comprises a tube, an elongated member, a first...
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US20100284020 |
PHOTONIC CRYSTAL FIBER SENSOR
Apparatus and method for chemical and biological agent sensing. An example sensing apparatus includes a resonator having a resonance frequency. The resonator includes a coil of a photonic crystal...
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US20100243448 |
DIRECT OPTICAL INTERROGATION OF AGENTS IN MICRO-FLUIDIC CHANNELS UTILIZING WHISPERING GALLERY RESONATOR APPROACH
A whispering gallery mode resonator based optical sensor assembly comprises a flow channel permeable to optical energy and first and second optical waveguides adjacent to a section of the flow...
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US20100014094 |
DISTRIBUTED GAS DETECTION
A system includes a plurality of optical resonators, a light source, an optical fiber that couples the plurality of optical resonators to the light source, and a detector that is coupled to the...
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US20110170112 |
HIGH INTENSITY FABRY-PEROT SENSOR
A sensor assembly having an optical fiber, a lens in optical communication with the optical fiber, a reflective surface spaced from the lens, for reflecting light from the beam back to the lens, a...
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US20090251705 |
Optical Sensing Based on Overlapping Optical Modes in Optical Resonator Sensors and Interferometric Sensors
Techniques and devices based on transverse magnetic (TM) and transverse electric (TE) modes in an optical resonator or interferometer to provide sensitive optical detection with insensitivity to a...
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US20100238454 |
Optical MEMS Chemical Sensor Array
A change in mass of a microbridge in a mass sensor can be sensed by applying a time-varying amplitude modulated electrostatic force to excite the microbridge into resonance at the frequency of...
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US20100149544 |
Sensor apparatus and method using optical interferometry
A sensor apparatus and method includes a sensor head with at least two surfaces separated by a gap. One surface is mechanically fixed, a second surface is free to move and deflections of the second...
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US20060170931 |
Biochemical sensors with micro-resonators
A biochemical sensor. The biochemical sensor includes a microcavity resonator including a sensing element defining a closed loop waveguide. The biochemical sensor is operable to detect a measurand...
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