Dr. Anthony Dandridge Profile

Dr. Anthony Dandridge

Optical Technician at US Naval Research Lab

SPIE Involvement:

Author

Publications (21)

Proceedings Article | 17 May 2016 Paper

The influence of underwater turbulence on optical phase measurements

Brandon Redding, Allen Davis, Clay Kirkendall, Anthony Dandridge

Proceedings Volume 9827, 982707 (2016) https://doi.org/10.1117/12.2230203

KEYWORDS: Turbulence, Phase shift keying, Underwater imaging, Optical turbulence, Imaging systems, Phase measurement, Modulation transfer functions, Image resolution, Ocean optics, Cameras

Read Abstract +

Proceedings Article | 17 May 2011 Paper

The origin, history and future of fiber-optic interferometric acoustic sensors for US Navy applications

James Cole, Joseph Bucaro, Clay Kirkendall, Anthony Dandridge

Proceedings Volume 7753, 775303 (2011) https://doi.org/10.1117/12.886762

KEYWORDS: Sensors, Fiber optics sensors, Acoustics, Fiber optics, Interferometry, Optical arrays, Time division multiplexing, Fused deposition modeling, Wavelength division multiplexing, Neodymium

Read Abstract +

Proceedings Article | 18 June 1998 Paper

Composite plate drop test using a 16-channel fibre Bragg grating strain sensor system

Geir Havsgard, Karianne Pran, Sverre Knudsen, P. Baalerud, Gunnar Wang, Sandeep Vohra, M. Davis, Anthony Dandridge, Alf Jensen

Proceedings Volume 3483, (1998) https://doi.org/10.1117/12.309672

KEYWORDS: Sensors, Composites, Fiber Bragg gratings, Wavelength division multiplexing, Interferometers, Wave plates, Phase shift keying, Optical fibers, Fiber optics sensors, Optical filters

Read Abstract +

Proceedings Article | 6 June 1997 Paper

Transient load monitoring on a composite hull ship using distributed fiber optic Bragg grating sensors

Alan Kersey, Michael Davis, Timothy Berkoff, Anthony Dandridge, R. Jones, Tsung-Ein Tsai, Gary Cogdell, Gunnar Wang, G. Havsgaard, Karianne Pran, Sverre Knudsen

Proceedings Volume 3042, (1997) https://doi.org/10.1117/12.275763

KEYWORDS: Sensors, Composites, Fiber Bragg gratings, Fiber optics sensors, Interferometers, Fiber optics, Interferometry, Skin, Phase shifts, Lead

Read Abstract +

Proceedings Article | 1 November 1994 Paper

Sensitivity limits of a Sagnac interferometer due to fundamental thermal-induced phase fluctuations in the fiber coil

Sverre Knudsen, Alan Tveten, Anthony Dandridge

Proceedings Volume 2292, (1994) https://doi.org/10.1117/12.191843

KEYWORDS: Sagnac interferometers, Sensors, Fiber optics sensors, Fiber optics, Fiber optic gyroscopes, Refractive index, Phase measurement, Fiber lasers, Laser optics, Temperature metrology

Read Abstract +

Proceedings Article | 1 November 1994 Paper

Fiber optic magnetic sensor technology for undersea applications

Frank Bucholtz, Carl Villarruel, Dominique Dagenais, J. McVicker, Kee Koo, Clay Kirkendall, A. Davis, S. Patrick, Anthony Dandridge

Proceedings Volume 2292, (1994) https://doi.org/10.1117/12.191820

KEYWORDS: Transducers, Interferometers, Magnetism, Fiber optics, Fiber optics sensors, Sensors, Magnetic sensors, Optical isolators, Fiber lasers, Magnetometers

Read Abstract +

Proceedings Article | 14 September 1994 Paper

High-sensitivity fiber optic planar ultrasonic microphone

Sverre Knudsen, A. Yurek, Alan Tveten, Anthony Dandridge

Proceedings Volume 2360, (1994) https://doi.org/10.1117/12.185083

KEYWORDS: Signal detection, Sensors, Acoustics, Fiber optics, Ultrasonics, Chemical elements, Optical fibers, Fiber optics sensors, Interferometers, Projection systems

Read Abstract +

Proceedings Article | 14 September 1994 Paper

Very high responsivity fiber optic hydrophones for commercial applications

C. Wang, Anthony Dandridge, Alan Tveten, A. Yurek

Proceedings Volume 2360, (1994) https://doi.org/10.1117/12.185074

KEYWORDS: Fiber optics, Optical fibers, Metals, Acoustics, Optical components, Fiber optic components, Optical arrays, Sensors, Mirrors, Structured optical fibers

Read Abstract +

Proceedings Article | 14 September 1994 Paper

Experimental evidence of transducer self noise in magnetostrictive fiber optic sensors

Dominique Dagenais, Frank Bucholtz, Anthony Dandridge

Proceedings Volume 2360, (1994) https://doi.org/10.1117/12.185089

KEYWORDS: Transducers, Interferometers, Magnetism, Fiber optics sensors, Signal detection, Sensors, Magnetic sensors, Interferometry, Fiber optics tests, Fiber optics

Read Abstract +

Proceedings Article | 14 September 1994 Paper

Optically demodulated interferometric sensor system

Alan Kersey, Michael Marrone, Kee Koo, Anthony Dandridge

Proceedings Volume 2360, (1994) https://doi.org/10.1117/12.185070

KEYWORDS: Interferometers, Modulation, Sensors, Interferometry, Signal processing, Demodulation, Optical filters, Electronic filtering, Modulators, Phase interferometry

Read Abstract +

We demonstrate the feasibility of optically demodulating and processing the output produced by an interferometric fiber sensor. A technique for providing the time filtering of an optical signal in the optical domain based on the use of a doped fiber section is reported. Optical processing is a field which offers enormous potential for rapid, parallel processing of information, and is an area which will continue to experience significant growth over the coming years. Optical sensors have a natural inherent compatibility with this form of processing, which could be utilized to great advantage for processesing the data from large arrays of sensors. Many forms of fiber optic sensor, however, produce an optical output which does not vary in a uniform fashion with the measurand field, and consequently require a linearization circuit. or 'demodulator' to provide a linear transfer function before a signal could be converted back to the optical domain and operated on by an optical processor. This is particularly true with interferometric fiber sensors which exhibit a cosine squared transfer function. To demodulate this form of output, a range of demodulation schemes have been developed, such as active phase tracking homodyne [1], phase generated carrier (PGC) passive homodyne [2], and synthetic heterodyne [3J. These techniques allow the detection of measurand-induced phase shifts down to the irad/'JHz level over a wide range of frequencies with high linearity and wide dynamic range. Certain forms of interferometric sensors designed for low frequency measurands, such as magnetometers and electhc field sensors, require the additional demodulation of a 'dither' induced phase carrier signal which is modulated by the DC and low frequency measurand information. In such systems, the overall demodulation process requires several electronic processing blocks after photodetection of the interferometer signal. In applications where arrays of such sensors are of interest, a significant amount of electronics may be required to fully demodulate the sensor outputs. We have examined the practicality of using optical techniques to perform much of the demodulation process, and in this paper demonstrate the feasibility of this concept.

Proceedings Article | 14 September 1994 Paper

Performance of 3 X 3 couplers in fiber optic sensor systems

Anthony Dandridge, C. Wang, Alan Tveten, A. Yurek

Proceedings Volume 2360, (1994) https://doi.org/10.1117/12.184986

KEYWORDS: Interferometers, Visibility, Polarization, Fiber optics sensors, Mirrors, Fiber optics, Phase shifts, Demodulation, Interferometry, Phase interferometry

Read Abstract +

Proceedings Article | 14 September 1994 Paper

Fiber optic gradient hydrophones

A. Yurek, B. Danver, Alan Tveten, Anthony Dandridge

Proceedings Volume 2360, (1994) https://doi.org/10.1117/12.185001

KEYWORDS: Fiber optics, Optical fibers, Acoustics, Fiber optics tests, Calibration, Signal detection, Sensors, Surveillance, Particles, Optical sensing

Read Abstract +

Proceedings Article | 14 September 1994 Paper

Eight-element array of three-axis fiber optic magnetometers for undersea applications

Frank Bucholtz, Carl Villarruel, Clay Kirkendall, Dominique Dagenais, J. McVicker, A. Davis, S. Patrick, Kee Koo, Anthony Dandridge, Gunnar Wang, Terje Lund, H. Valo

Proceedings Volume 2360, (1994) https://doi.org/10.1117/12.185087

KEYWORDS: Magnetism, Interferometers, Sensors, Fiber optics, Magnetometers, Magnetic sensors, Fiber optics sensors, Signal processing, Optical fibers, Optical components

Read Abstract +

Proceedings Article | 14 September 1994 Paper

Development of fiber optic sensor systems

Anthony Dandridge

Proceedings Volume 2360, (1994) https://doi.org/10.1117/12.185028

KEYWORDS: Fiber optics, Fiber optics sensors, Multiplexing, Polarization, Sensors, Optical fibers, Semiconductor lasers, Optical arrays, Fiber optics tests, Acoustics

Read Abstract +

Proceedings Article | 14 September 1994 Paper

Operation of a Sagnac interferometer limited by fundamental thermal-induced phase fluctuations in the fiber

Sverre Knudsen, Alan Tveten, Anthony Dandridge

Proceedings Volume 2360, (1994) https://doi.org/10.1117/12.185073

KEYWORDS: Sagnac interferometers, Sensors, Gyroscopes, Fiber optic gyroscopes, Refractive index, Cladding, Phase measurement, Fiber optics sensors, Fiber optics, Temperature metrology

Read Abstract +

Proceedings Article | 14 September 1994 Paper

Demodulator optimization for the interrogation of fiber optic hydrophones in real-world environments

Alan Tveten, A. Yurek, Michael Opsasnick, Anthony Dandridge

Proceedings Volume 2360, (1994) https://doi.org/10.1117/12.184978

KEYWORDS: Fiber optics, Acoustics, Calibration, Signal processing, Demodulation, Interferometers, Signal detection, Electronic filtering, Fiber optics tests, Linear filtering

Read Abstract +

Proceedings Article | 5 March 1993 Paper

Polarization-independent array configurations based on Michelson interferometer networks

Michael Marrone, Alan Kersey, Anthony Dandridge

Proceedings Volume 1797, (1993) https://doi.org/10.1117/12.141288

KEYWORDS: Sensors, Polarization, Michelson interferometers, Reflectors, Multiplexing, Visibility, Birefringence, Mirrors, Interferometry, Dielectric polarization

Read Abstract +

Proceedings Article | 1 January 1992 Paper

Multiplexed interferometric fiber sensor arrays

Anthony Dandridge, Alan Kersey

Proceedings Volume 1586, (1992) https://doi.org/10.1117/12.56517

KEYWORDS: Sensors, Multiplexing, Fiber optics sensors, Interferometers, Interferometry, Modulation, Polarization, Time division multiplexing, Signal detection, Wavelength division multiplexing

Read Abstract +

Proceedings Article | 1 January 1992 Paper

Input polarization control scheme for addressing polarization-induced fading in multiplexed interferometric sensor arrays

Michael Marrone, Alan Kersey, Anthony Dandridge

Proceedings Volume 1586, (1992) https://doi.org/10.1117/12.56519

KEYWORDS: Sensors, Visibility, Fiber optics sensors, Polarization, Multiplexing, Optical spheres, Interferometry, Birefringence, Interferometers, Polarization control

Read Abstract +

Proceedings Article | 1 August 1991 Paper

Interferometric optical fiber sensors for absolute measurement of displacement and strain

Alan Kersey, Timothy Berkoff, Anthony Dandridge

Proceedings Volume 1511, (1991) https://doi.org/10.1117/12.45977

KEYWORDS: Interferometers, Modulation, Fiber optics sensors, Interferometry, Sensors, Signal processing, Frequency modulation, Visibility, Phase shift keying, Phase shifts

Read Abstract +

Proceedings Article | 1 February 1991 Paper

Excess noise in fiber gyroscope sources

William Burns, Robert Moeller, Anthony Dandridge

Proceedings Volume 1367, (1991) https://doi.org/10.1117/12.24732

KEYWORDS: Gyroscopes, Fiber optic gyroscopes, Neodymium, Signal to noise ratio, Sensors, Interferometry, Erbium, Fiber lasers, Interference (communication), Fiber optics

Read Abstract +

Showing 5 of 21 publications

Conference Committee Involvement (2)

19th International Conference on Optical Fibre Sensors

14 April 2008 | Perth, Australia

Fiber Optic Sensors and Applications V

10 September 2007 | Boston, MA, United States

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years