Dr. Daniel C. Senft Profile

Dr. Daniel C. Senft

Senior Scientist

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Author

Publications (20)

Proceedings Article | 27 February 2004 Paper

Comparison of radiometric and chemical detection sensitivities for heterodyne and direct detection DIAL

Daniel Senft, Diego Pierrottet

Proceedings Volume 5268, (2004) https://doi.org/10.1117/12.518593

KEYWORDS: Heterodyning, Receivers, Signal to noise ratio, Absorption, Signal detection, Chemical detection, Oscillators, Transmitters, Bragg cells, Speckle

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Proceedings Article | 15 August 2003 Paper

Comparison of radiometric and chemical detection sensitivities for heterodyne and direct detection DIAL

Daniel Senft, Diego Pierrottet

Proceedings Volume 5085, (2003) https://doi.org/10.1117/12.487326

KEYWORDS: Heterodyning, Receivers, Absorption, Signal to noise ratio, Chemical detection, Oscillators, Bragg cells, Speckle, Transmitters, Telescopes

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Proceedings Article | 24 June 2002 Paper

Development of a high-speed wavelength-agile CO2 local oscillator for heterodyne DIAL measurements

Daniel Senft, Diego Pierrottet

Proceedings Volume 4722, (2002) https://doi.org/10.1117/12.472264

KEYWORDS: Heterodyning, Oscillators, Absorption, Bragg cells, Receivers, LIDAR, Chemical detection, Carbon dioxide, Analytical research, Transmitters

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A high repetition rate, wavelength agile CO₂ laser has been developed at the Air Force Research Laboratory for use as a local oscillator in a heterodyne detection receiver. Fats wavelength selection is required for measurements of airborne chemical vapors using the differential absorption lidar (DIAL) technique. Acousto-optic modulator are used to tune between different wavelengths at high speeds without the need for moving mechanical parts. Other advantages obtained by the use of acousto-optic modulators are laser output power control per wavelength and rugged packaging for field applications. The local oscillator design is described, and the results from laboratory DIAL measurements are presented. The coherent remote optical sensor system is an internal research project being conducted by the Air Force Research Laboratory Directed Energy Directorate, Active Remote Sensing Branch. The objective of the project is to develop a new long-range standoff spectral sensor that takes advantage of the enhanced performance capabilities coherent detection can provide. Emphasis of the development is on a low cost, compact, and rugged active sensor exclusively designed for heterodyne detection using the differential absorption lidar technique. State of the art technologies in waveguide laser construction and acousto- optics make feasible the next generation of lasers capable of supporting coherent lidar system requirements. Issues addressed as part of the development include optoelectronic engineering of a low cost rugged system, and fast data throughput for real time chemical concentration measurements. All hardware used in this sensor are off-the- shelf items, so only minor hardware modifications were required for the system as it stands. This paper describes a high-speed heterodyne detection CO₂ DIAL system that employs a wavelength agile, acousto-optically tuned local oscillator in the receiver. Sample experimental data collected in a controlled environment are presented as well. Chemical detection using 12 wavelengths at 200 pulses per second has been demonstrated. Initial progress on experiments to make a direct, simultaneous comparison of heterodyne and direct detection DIAL systems will also be described.

Proceedings Article | 9 January 2002 Paper

Doppler spectral scanning differential absorption lidar

Bradley Jost, Daniel Senft, Diego Pierrottet, Mark Kovacs, Joe Cardani

Proceedings Volume 4484, (2002) https://doi.org/10.1117/12.452771

KEYWORDS: Doppler effect, Satellites, Decision support systems, Absorption, LIDAR, Retroreflectors, Atmospheric monitoring, Gas lasers, Heterodyning, Earth's atmosphere

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Proceedings Article | 28 July 2000 Paper

CO2 coherent differential absorption lidar

Diego Pierrottet, Daniel Senft

Proceedings Volume 4036, (2000) https://doi.org/10.1117/12.394075

KEYWORDS: Heterodyning, Absorption, Receivers, Sensors, LIDAR, Chemical detection, Oscillators, Carbon dioxide, Signal detection, Bragg cells

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Proceedings Article | 30 November 1999 Paper

Chemical detection results from ground testing of an airborne CO2 differential absorption lidar system

Daniel Senft, Marsha Fox, Carla Hamilton, Dale Richter, N. Higdon, Brian Kelly, Robert Babnick, Diego Pierrottet

Proceedings Volume 3855, (1999) https://doi.org/10.1117/12.371273

KEYWORDS: Absorption, Receivers, Heterodyning, Carbon dioxide lasers, Sensors, Chemical analysis, LIDAR, Chemical detection, Carbon dioxide, Control systems

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Proceedings Article | 22 October 1999 Paper

Ground test results and analysis advancements for the AFRL airborne CO2 DIAL system

Daniel Senft, Marsha Fox, Carla Hamilton, Dale Richter, N. Higdon, Brian Kelly, Robert Babnick, Diego Pierrottet

Proceedings Volume 3757, (1999) https://doi.org/10.1117/12.366425

KEYWORDS: Absorption, Receivers, Chemical analysis, Sensors, Carbon dioxide lasers, LIDAR, Analytical research, Heterodyning, Control systems, Carbon dioxide

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Proceedings Article | 28 May 1999 Paper

Performance characterization and ground testing of an airborne CO2 differential absorption lidar system (phase II)

Daniel Senft, Marsha Fox, Carla Hamilton, Dale Richter, N. Higdon, Brian Kelly

Proceedings Volume 3707, (1999) https://doi.org/10.1117/12.351341

KEYWORDS: Absorption, LIDAR, Carbon dioxide lasers, Chemical analysis, Sensors, Control systems, Receivers, Carbon dioxide, Analytical research, Chemical detection

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Proceedings Article | 28 May 1999 Paper

Conceptual design of an acquisition, processing, and control system for a semi-autonomous airborne differential absorption lidar system

Brian Kelly, Daniel Senft, James Dowling, N. Higdon, Marsha Fox, Vincent Cacciatore

Proceedings Volume 3707, (1999) https://doi.org/10.1117/12.351340

KEYWORDS: Data acquisition, Control systems, Computing systems, LIDAR, Chemical analysis, Absorption, Control systems design, Pulsed laser operation, Data processing, Chemometrics

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Proceedings Article | 28 May 1999 Paper

Coherent remote optical sensor system overview

Diego Pierrottet, Christopher Washer, Daniel Senft

Proceedings Volume 3707, (1999) https://doi.org/10.1117/12.351343

KEYWORDS: Oscillators, Receivers, Bragg cells, Sensors, LIDAR, Spectral resolution, Heterodyning, Carbon dioxide lasers, Optical sensors, Waveguides

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Proceedings Article | 3 November 1998 Paper

Comparisons of airborne CO2 DIAL measurements to high-resolution atmospheric transmission calculations

James Dowling, Brian Kelly, Daniel Senft, Ronald Bousek, N. Higdon, Marsha Fox

Proceedings Volume 3433, (1998) https://doi.org/10.1117/12.330236

KEYWORDS: Absorption, Atmospheric modeling, Receivers, LIDAR, Carbon dioxide lasers, Carbon dioxide, Sensors, Ozone, Mirrors, Computing systems

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Proceedings Article | 3 November 1998 Paper

Development and testing of a long-range airborne CO2 DIAL chemical detection system

N. Higdon, Daniel Senft, Marsha Fox, Carla Hamilton, Brian Kelly, James Dowling, Diego Pierrottet, David Dean, Dale Richter, Ronald Bousek

Proceedings Volume 3433, (1998) https://doi.org/10.1117/12.330237

KEYWORDS: Absorption, Sensors, Receivers, Cameras, LIDAR, Telescopes, Control systems, Data acquisition, Carbon dioxide, Diagnostics

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Proceedings Article | 15 January 1998 Paper

Performance characterization and ground testing of an airborne CO2 differential absorption lidar system

Daniel Senft, Marsha Fox, Ronald Bousek, James Dowling, Dale Richter, Brian Kelly

Proceedings Volume 3219, (1998) https://doi.org/10.1117/12.298057

KEYWORDS: Absorption, LIDAR, Carbon dioxide, Laser development, Chemical detection, Carbon dioxide lasers, Laser optics, Optical sensors, Airborne laser technology, Airborne remote sensing

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Proceedings Article | 6 January 1997 Paper

CO2 lidar measurements over a 20-km slant path

Daniel Senft, Marsha Fox, John Gonglewski, James Dowling, Ronald Highland, Michael Shilko

Proceedings Volume 2956, (1997) https://doi.org/10.1117/12.263158

KEYWORDS: Absorption, Heterodyning, Signal detection, Target detection, Atmospheric propagation, Polarizers, Polarization, LIDAR, Radio propagation, Switches

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Proceedings Article | 6 January 1997 Paper

Design and performance simulations for an airborne DIAL system for long-range remote sensing applications

James Dowling, Brian Kelly, John Gonglewski, Marsha Fox, Michael Shilko, N. Higdon, Ronald Highland, Daniel Senft, David Dean, John Blackburn, Diego Pierrottet

Proceedings Volume 2956, (1997) https://doi.org/10.1117/12.263157

KEYWORDS: Sensors, Receivers, Mirrors, Pulsed laser operation, Cameras, Signal to noise ratio, Telescopes, Carbon dioxide lasers, Device simulation, Optical alignment

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Proceedings Article | 15 December 1995 Paper

Atmospheric characterization studies supporting the development of a long-range CO2 laser-based DIAL system

James Dowling, Marsha Fox, John Gonglewski, Daniel Senft, Lyle Finkner, Ronald Highland, Stanley Czyzak

Proceedings Volume 2580, (1995) https://doi.org/10.1117/12.228479

KEYWORDS: Carbon dioxide lasers, Atmospheric propagation, Receivers, Turbulence, Infrared radiation, Absorption, Atmospheric optics, Atmospheric laser remote sensing, Atmospheric particles, Humidity

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Proceedings Article | 15 December 1995 Paper

Long-path CO2 lidar measurements

Daniel Senft, Marsha Fox, John Gonglewski, James Dowling, Ronald Highland, Stanley Czyzak

Proceedings Volume 2580, (1995) https://doi.org/10.1117/12.228494

KEYWORDS: Absorption, Signal detection, Heterodyning, Atmospheric propagation, Polarizers, Sensors, Target detection, Polarization, LIDAR, Radio propagation

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Proceedings Article | 15 December 1995 Paper

Laser long-range remote-sensing program experimental results

Ronald Highland, Michael Shilko, Marsha Fox, John Gonglewski, Stanley Czyzak, James Dowling, Brian Kelly, Diego Pierrottet, Donald Ruffatto, Sharon Loando, Chris Matsuura, Daniel Senft, Lyle Finkner, Joe Rae, Jonathan Gallegos

Proceedings Volume 2580, (1995) https://doi.org/10.1117/12.228489

KEYWORDS: Remote sensing, Atmospheric laser remote sensing, Atmospheric optics, Optical amplifiers, Sensors, Lawrencium, Transceivers, Meteorology, Atmospheric modeling, Heterodyning

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Proceedings Article | 21 December 1994 Paper

Design, analysis, and testing of a wavelength-agile differential absorption light detection and ranging (DIAL) system for long-standoff range operation

James Dowling, John Gonglewski, David Stone, Marsha Fox, Stanley Czyzak, Edward Herman, Daniel Senft

Proceedings Volume 2312, (1994) https://doi.org/10.1117/12.197390

KEYWORDS: Sensors, Receivers, Pulsed laser operation, Absorption, Carbon dioxide lasers, Mirrors, LIDAR, Remote sensing, Optical amplifiers, Signal detection

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Proceedings Article | 23 September 1994 Paper

Remote sensing measurements using a CO2 laser

David Stone, John Gonglewski, Marsha Fox, Stanley Czyzak, James Dowling, Daniel Senft, Edward Herman

Proceedings Volume 2271, (1994) https://doi.org/10.1117/12.188146

KEYWORDS: Sensors, Pulsed laser operation, Carbon dioxide lasers, Absorption, Mirrors, Carbon dioxide, Receivers, Remote sensing, Transceivers, Laser energy

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Showing 5 of 20 publications

Conference Committee Involvement (1)

Unconventional Imaging VI

1 August 2010 | San Diego, California, United States

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