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Showing 1 to 20 of 209 for “"Fabry-Perot"”.
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Birefringent Fabry-Perot sensors
… polarisation-maintaining (birefringent) infibre Fabry-Perot interferometric sensors for the measurement of temperature or strain. By using a highly birefringent optical fibre in their cavity, these sensors form two interferometers - one for each polarisation axis. As in the case of other fibre …
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Coupled-waveguide Fabry-Perot resonator
… semiconductor lasers. Conventional Fabry-Perot resonators provide a narrow spectral width but lack the capability of mode discrimination. A new coupled-waveguide Fabry-Perot resonator made of two parallel waveguides with reflecting mirrors at the ends is proposed for application as …
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Extrinsic Fabry-Perot Interferometric hydrogen gas sensor
… of hydrogen gas using a modified Extrinsic Fabry-Perot Interferometric (EFPI) sensor are presented in this work. A new custom-designed, custom-built radio frequency (RF) magnetron sputtering system has been used to deposit thin films of palladium metal along with cylindrical substrates. The …
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MEMS enabled Fabry-Perot cavity for cQED experiments
The development of novel experimental techniques in atomic physics is allowing for the manipulation and control of atoms in structured silicon chips. These new techniques to manipulate atoms in a chip require building micro systems on chip that support actuation, alignment control and tunability …
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Parameter estimation in imaging Fabry-Perot Doppler spectroscopy
Fabry-Perot spectroscopy has been used for many decades to observe optical phenomena in the Earth's upper atmosphere. The techniques have been evolving in recent years, with the major technical advancement being use of a CCD in the focal plane of the instrument. This dissertation rigorously …
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Miniature fiber-optic multicavity Fabry-Perot interferometric biosensor
Fiber-optic Fabry-Perot interferometric (FFPI) sensors have been widely used due to their high sensitivity, ease of fabrication, miniature size, and capability for multiplexing. However, direct measurement of self-assembled thin films, receptor immobilization process or biological reaction is …
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Radiation pressure effects in a suspended Fabry-Perot cavity
We report on experimental observation of radiation-pressure induced effects in a high-power optical cavity. These effects play an important role in next generation gravitational wave detectors, as well as quantum non-demolition devices. We describe two experiments in which a low-transmission input …
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Extrinsic Fabry-Perot interferometer for surface acoustic wave measurement
… acoustic wave sensor based on an extrinsic Fabry-Perot interferometer is described. A single-mode fiber, used as the input/output fiber, and a multimode fiber, used mainly as a reflector, form an air-gap that acts as a low-finesse Fabry-Perot cavity. The Fresnel reference reflection from the …
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Controlled Fabrication System of Fabry-Perot Optical Fiber Sensors
… categories of these sensors is the Extrinsic Fabry-Perot interferometer (EFPI) sensor which is inherently simple and requires only modest amount of interface electronics. These advantages make it suitable for many practical applications. Investigating a cost-effective, reliable and repeatable …
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Extrinsic Fabry-Perot Interferometer System Using Wavelength Modulated Source
… a new measurement system for the extrinsic Fabry-Perot interferometer (EFPI) sensor. Using a wavelength modulated source and a novel extended-gap EFPI, some of the limitations of interferometric signal demodulation are overcome. By scanning the output wavelength of a multilongitudinal mode …
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Fabry-Perot Cavity, Pulsed Fourier Transform Molecular Beam Microwave Spectroscopy
… the foundations of the theory of a Fabry-Perot cavity, of molecular polarization and of molecular beams is presented as it relates to this spectrometer. The block diagram is presented that shows how these techniques are incorporated into a working system. Certain design …
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Construction of a fast-scanning far-infrared Fabry-Perot interferometer.
Thesis: M.S., Massachusetts Institute of Technology, Department of Nuclear Engineering, 1973
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Fabry-Perot Sapphire Temperature Sensor for Use in Coal Gasification
… Of the available interferometer configurations, Fabry-Perot interferometers are distinguished in their high accuracy and great isolation from sources of error. In this thesis, improvements are reported to an existing design to enhance its reliability and to reduce possible modes of failure. The …
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High-finesse/small gap extrinsic Fabry-Perot interferometer and applications
… light source, high-finesse/small-gap extrinsic Fabry-Perot cavity, and a novel demodulation scheme is proposed. The principle of operation is based on the large spectral displacement of an intensity peak, in the transmitted output pattern, due to minute changes in cavity length of a …
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Imaging of volcanic trace gases by Fabry-Perot interferometer correlation spectroscopy
… this thesis, a novel imaging approach based on Fabry-Perot interferometer correlation spectroscopy (FPI CS) is presented. The technique exploits the periodic transmission profile of a Fabry-Perot interferometer (FPI) and its correlation to the (approximately periodically varying) target trace gas …
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Multiplexing of Extrinsic Fabry-Perot Optical Fiber Sensors for Strain Measurements
… demodulation of the interference spectrum of two Fabry-Perot cavities using Fourier analysis. The goal of this research is to use Fourier analysis to demodulate the spectrum of four multiplexed extrinsic Fabry-Perot fiber interferometers for strain measurements. Comparisons of fiber, foil, and …
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Fabry-Perot Observations of Midlatitude Neutral Winds and Atmospheric Gravity Wave Activity
… the troposphere and lower thermosphere. A Fabry-Perot interferometer possessed by the Space Physics Research Laboratory at the Embry-Riddle Aeronautical University, Daytona Beach, FL campus was used to measure Doppler shifts in the atomic oxygen green line emission which originates from an …
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Low coherence fibre optic Fabry-Perot sensors suitable for multiplexed strain measurement
… of the potential of low finesse in-fibre Fabry-Perot interferometer sensors for the measurement of strain. There are a number of areas of modern engineering applications where there is a need for an alternative to conventional resistive strain gauges; particularly where a number of such …
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Optical gas sensors based on correlation spectroscopy using a Fabry-Perot interferometer
… sensors based on correlation spectroscopy with a Fabry-Perot interferometer (FPI). In this technique the spectral FPI transmission fringe pattern is matched with ro-vibrational absorption lines. To produce the cross correlation principle the FPI fringe pattern must be shifted along the frequency …
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