Papers by Stuart A Kingsley
Electronics Letters, 1977
The search for extraterrestrial intelligence (SETI) in the optical spectrum III : 22-24 January 2001, San Jose, USA
SPIE eBooks, 2001
The search for extraterrestrial intelligence (SETI) in the optical spectrum : 21-22 January 1993, Los Angeles, California
SPIE eBooks, 1993
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Use of optical fibers as instrumentation transducers
<title>Recovery Of Phase Modulated Signals In Multimode Optical Fibres</title>
Proceedings of SPIE, Aug 22, 1980
ABSTRACT
Proceedings of SPIE, Sep 15, 2004
SRICO has developed a revolutionary approach to physiological status monitoring using state-of-th... more SRICO has developed a revolutionary approach to physiological status monitoring using state-of-the-art optical chip technology. The company's patent pending Photrode™ is a photonic electrode that uses unique optical voltage sensing technology to measure and monitor electrophysiological parameters. The optical-based monitoring system enables drycontact measurements of EEG and ECG signals that require no surface preparation or conductive gel and non-contact measurements of ECG signals through the clothing. The Photrode™ applies high performance optical integrated circuit technology, that has been successfully implemented in military & commercial aerospace, missile, and communications applications for sensing and signal transmission. SRICO's award winning Photrode™ represents a new paradigm for the measurement of biopotentials in a reliable, convenient, and non-intrusive manner. Photrode™ technology has significant applications on the battlefield for rapid triage to determine the brain dead from those with viable brain function. An ECG may be obtained over the clothing without any direct skin contact. Such applications would enable the combat medic to receive timely medical information and to make important decisions regarding identification, location, triage priority and treatment of casualties. Other applications for the Photrode™ include anesthesia awareness monitoring, sleep medicine, mobile medical monitoring for space flight, emergency patient care, functional magnetic resonance imaging, various biopotential signal acquisition (EMG, EOG), and routine neuro and cardio diagnostics.
<title>Distributed fiber optic acoustic sensor for leak detection</title>
Proceedings of SPIE, 1992
Leaks in dielectric fluid-filled, high-voltage distribution lines can cause significant problems ... more Leaks in dielectric fluid-filled, high-voltage distribution lines can cause significant problems for the electric power industry. Often, these lines run over long distance and are difficult to access. Operators may know that a leak exists because additional fluid is required to maintain pipe pressure; however, locating the leak is often a significant challenge. A system that could monitor and locate leaks within the electrical distribution pipe lines would be highly desirable. We present a distributed fiber optic acoustic sensor technology that could be used to measure and locate leaks within fluid-filled, high-voltage distribution lines. In this application, the optical fiber sensor is placed inside the fluid-filled pipe and can potentially locate leaks to within several meters. The fiber optic acoustic sensor is designed such that it can listen to the sound produced by the fluid as it escapes from the pipe into the surrounding soil. The fluid inside the pipe is typically maintained at a pressure of 200 psi and escapes at high velocity when a leak occurs. The distributed fiber optic sensing system being developed is based upon the Sagnac interferometer and is unusual in that range information is not obtained by the more common method of optical time domain reflectometry or optical frequency domain reflectometry, but by essentially a CW technique which works in the frequency domain. It is also unusual in that the signal processing technique actually looks for the absence of a signal.
Proceedings of SPIE, Aug 6, 1993
On the assumption that ETI technology would appear to late 20th Century man to is being conducted... more On the assumption that ETI technology would appear to late 20th Century man to is being conducted in an erroneous region of the electromagnetic spectrum, i.e., that SETI receivers are "tuned to the be like "magic", it is imagined that ETIs will be using much larger transmitting telescopes or arrays, and transmitter wrong frequencies". Table 1 summarizes the salient points of the comparison between different electromagnetic powers far in excess of 1 kW. In practice, the signal is likely to be pulsed , and thus less detectable by normal communications technologies as applied to SETI, using heterodyning telescopes to detect continuous wave (cw) integrating detectors, i.e., the naked eye, photographic plates or standard CCDs. Optical SETI is a branch of science beacons. This paper revisits a subject first discussed by Schwartz and Townes 32 years ago, and subsequently to which the enthusiastic amateur astronomer may be able to make a useful contribution. In so doing, this may so 1 investigated by Ross , Shvartsman , Connes , Zuckerman Betz , Sherwood and Rather. Note that according to increase public and scientific interest in all forms of SETI, that this field of scientific endeavor will at last get the 2 3 4 5 6 7 8 11 15 * Signal-To-Planck/Daylight Ratios assume polarized starlight and background, and no Fraunhofer dark-line suppression (typically 10 to 20 dB). The Cyclops Array proposed in 1971, consisted of 900, 100 meter diameter dishes covering an area 6.4 km in diameter. a Apparent magnitude of transmitter is not corrected for visible wavelength. b Relative brightness of transmitter in comparison to unpolarized Planckian starlight (black-body emitter at 5,800 K). c Apparent Stellar Magnitude of reflected Planckian starlight from a Jupiter-size alien (extra-solar) planet. d Signal-To-Planck Ratio at the heterodyned I.F. frequency, assuming star and transmitter are not separately resolved. e Signal-To-Planck Ratio at the heterodyned I.F. frequency, assuming star and transmitter are separately resolved. f Background daylight sky radiance for ground-based visible telescopes and infrared telescopes (24 hr/day, 300 K atmosphere). g Signal-To-Daylight Ratio (per pixel) for diffraction-limited ground-based visible telescopes and infrared telescopes. h For convenience, Signal-To-Noise Ratios are normalized to a 1 Hz electrical bandwidth. i Typical Doppler shift due to line-of-sight relative motions between stars at 20 km/s. j Maximum local Doppler shift due to motion of transmitter/receiver around solar-type star (1 A.U. orbit). k Maximum local Doppler drift (chirp) for transmitter/receiver in geosynchronous orbit around Earth-type planet. l Maximum local Doppler drift (chirp) for a ground-based transmitter/receiver on an Earth-type planet. m Approximate ground-based receiver cost (1993 millions), assuming re-use or sharing of existing observatories in each hemisphere. n Approximate ground-based receiver cost (1993 millions), assuming a new dedicated (adaptive optical) telescope in each hemisphere. o Approximate receiver cost (1993 millions) for a single space-based telescope. p
Electronics Letters, 1978
Electronics Letters, May 9, 1985
Optical frequency-domain reflectometry (OFDR) shows promise as a diagnostic tool for high-resolut... more Optical frequency-domain reflectometry (OFDR) shows promise as a diagnostic tool for high-resolution ranging in fibre/integrated-optic systems, and in high-resolution distributed fibre-optic sensors. We discuss some signal processing aspects of this technology, potential performance and application.
Synchronous Fiber-Optic Gravitational Telescopes
Springer Series in Optical Sciences, 1982
Optical fibers may be used to sense a number of parameters including rotation. A new form of fibe... more Optical fibers may be used to sense a number of parameters including rotation. A new form of fiber-optic device is proposed, which is sensitive to gravitational radiation, and is based on the BRAGINSKY-MENSKII synchronous electromagnetic gravitational-wave detector. The fiber-optic gravitational telescope employs a very large Sagnac interferometer to detect the gravitationally-induced phase modulation.
Fiber-optic sensors: Opportunities for distributed measurement
Intech, 1985
IEEE Sensors Journal, 2014
An electro-optic, solid-state electric field sensor system for noncontact detection of energized ... more An electro-optic, solid-state electric field sensor system for noncontact detection of energized objects at power frequency (60 Hz) was investigated. In laboratory testing, the sensor system was found to have a minimum detectable field amplitude of 4 mV/m/Hz 1/2 , which was further reduced by a factor of 2 through vector averaging over 20 cycles. In an experimental setup emulating the realistic scenario of an energized conducting structure (such as a street light or metal fence post), the detection of a 1-m object energized at 1 VAC at a distance of 2 m was demonstrated.
Optical modulators with linearized response functions have been investigated for many years, due ... more Optical modulators with linearized response functions have been investigated for many years, due to their important applications in analog and RF communications and data transfer links. In particular, a linearized response function offers higher dynamic range because of lower harmonic and intermodulation distortions. Another advantage of a linearized response function is an enhanced tolerance to bias point drift. In evaluating the merit of a linearized design from a systems application perspective, the slope efficiency, defined as the change in intensity per unit change in modulator drive voltage at the operating point, is an important figure of merit. Srico addressed the development of variable coupling in directional coupler modulator devices to improve linearity of the response function. Devices were fabricated and tested in congruent and stoichiometric lithium niobate substrates. Tests on prototype devices showed spurious free dynamic range greater than MZI modulators.
An Electrode-Less Integrated Mach-Zehnder Interferometer Electric Field Sensor
Guided-Wave Optoelectronics, 1995
Advances in the development of a newly configured Mach-Zehnder interferometric electric field sen... more Advances in the development of a newly configured Mach-Zehnder interferometric electric field sensor device utilizing the electro-optic effect are reported. The integrated optical lithium niobate device operates solely by immersion in an electric field, using no metallic electrodes. Reverse poling of one arm of the interferometer results in additive optical phase changes in the interferometer arms when the device is placed in an electric field. Recently fabricated devices have exhibited a measured minimum detectable field of 34 mV/m per √Hz and a frequency response of greater than 10 GHz.
Electronics Letters, 1974
state of the cycle counter. When the current state of the cycle counter reaches the highest b.c.d... more state of the cycle counter. When the current state of the cycle counter reaches the highest b.c.d. number for the given temperature segment, the reset logic generates a trigger pulse that triggers the m.m.v. The segment decoder has a separate connection with the m.m.v. that triggers the first reset pulse at 120 °C, i.e. that starts the first counting cycle of the cycle counter. The specific realisation of the segment decoder and reset logic depends orMhe thermocouple type used and the permitted error. The digital lineariser with cycle counter described here can be also used for the linearisation of the outputs of other nonlinear sensors used for the measurement of pressure, flow, humidity etc.
This paper describes the design and construction of the first Visible Optical SETI Observatory in... more This paper describes the design and construction of the first Visible Optical SETI Observatory in North America. The rationale supporting this activity is also given. The Columbus Optical SETI Observatory is designed to detect ultra-fast pulsed laser beacon signals in the visible and near-infrared. The design and construction of The Columbus Optical SETI Observatory has been underway for two years and employs the Meade LX200 10" (25.4-cm) Schmidt-Cassegrain Telescope. Recently, this observatory acquired a 240 sq. ft. control/conference room and a 10 ft. diameter astronomical dome to house the telescope. The targeted search will formally begin next year, and will examine the same stars in the northern hemisphere presently under investigation by Microwave SETI's Project Phoenix. A photon-counter will be used to look for the fast laser pulses. Eventually, the photoncounting system employed will be capable of detecting pulses as short as 1 ns. Each night's observations will...
OFDR Diagnostics For Fiber/Integrated Optic Systems And High Resolution Distributed Fiber Optic Sensing
Fiber Optic and Laser Sensors III, 1986
The Columbus Optical SETI Observatory
... the region of the microwave spectrum between the H and lowest OH resonance lines (1.420 to 1.... more ... the region of the microwave spectrum between the H and lowest OH resonance lines (1.420 to 1.662 GHz), which has come to be known as the “water hole,” has become a favored “magic Kingsley: Columbus Optical SETI Observatory 389 OPTICAL SETI II MICROWAVE SETI ...
Thermal refractive materials for optical sensor application
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Papers by Stuart A Kingsley