Dr. David C. Hovde Profile

Dr. David C. Hovde

Principal Research Scientist at Southwest Sciences Inc

SPIE Involvement:

Author

Publications (12)

Proceedings Article | 23 February 2018 Paper

Measuring electric fields with nitrogen-vacancy ensembles for neutron electric dipole moment experiments

Chris Hovde, Sarvagya Sharma, Fahad Alghannam, Douglas Beck

Proceedings Volume 10531, 105310Z (2018) https://doi.org/10.1117/12.2300032

KEYWORDS: Magnetism, Diamond, Microwave radiation, Electrodes, Spectroscopy, Nitrogen, Signal detection, Crystals, Microscopes, Luminescence

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Proceedings Article | 27 January 2017 Presentation + Paper

Electric and magnetic sensing with NV ensembles in diamonds

Sarvagya Sharma, Chris Hovde, Fahad Alghannam, Douglas Beck

Proceedings Volume 10111, 101112W (2017) https://doi.org/10.1117/12.2252562

KEYWORDS: Magnetism, Diamond, Magnetic sensors, Crystals, Microwave radiation, Electrodes, Microscopes, Nitrogen, Near field optics, Objectives

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Proceedings Article | 13 February 2016 Paper

Diamond-based field sensor for nEDM experiment

Sarvagya Sharma, Chris Hovde, Douglas Beck

Proceedings Volume 9755, 97552U (2016) https://doi.org/10.1117/12.2211910

KEYWORDS: Diamond, Quantum cryptography, Quantum dots, Imaging spectroscopy, Sensors, Transparency, Magnetic sensors, Annealing, Magnetism, Modulation, Microwave radiation, Signal detection, Electrodes, Nitrogen

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Proceedings Article | 24 May 2011 Paper

Heading error in an alignment-based magnetometer

Chris Hovde, Brian Patton, Oscar Versolato, Eric Corsini, Simon Rochester, Dmitry Budker

Proceedings Volume 8046, 80460Q (2011) https://doi.org/10.1117/12.883953

KEYWORDS: Magnetometers, Magnetism, Polarization, Rubidium, Error analysis, Sensors, Prototyping, Cesium, Head, Electronics

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A prototype magnetometer for anti-submarine warfare applications is being developed based on nonlinear magneto-optical rotation (NMOR) in atomic vapors. NMOR is an atomic spectroscopy technique that exploits coherences among magnetic sublevels of atoms such as cesium or rubidium to measure magnetic fields with high precision. NMOR uses stroboscopic optical pumping via frequency or amplitude modulation of a linearly polarized laser beam to create the alignment. An anti-relaxation coating on the walls of the atomic vapor cell can result in a long lifetime of 1 s or more for the coherence and enables precise measurement of the precession frequency. With proper feedback, the magnetometer can self-oscillate, resulting in accurate tracking and fast time response. The NMOR magnetic resonance spectrum of ⁸⁷Rb has been measured as a function of heading in Earth's field. Optical pumping of alignment within the F=2 hyperfine manifold generates three resonances separated by the nonlinear Zeeman splitting. The spectra show a high degree of symmetry, consisting of a central peak and two side peaks of nearly equal intensity. As the heading changes, the ratio of the central peak to the average of the two side peaks changes. The amplitudes of the side peaks remain nearly equal. An analysis of the forced oscillation spectra indicates that, away from dead zones, heading error in self-oscillating mode should be less than 1 nT. A broader background is also observed in the spectra. While this background can be removed when fitting resonance spectra, understanding it will be important to achieving the small heading error in self-oscillating mode that is implied by the spectral measurements. Progress in miniaturizing the magnetometer is also reported. The new design is less than 10 cm across and includes fiber coupling of light to and from the magnetometer head. Initial tests show that the prototype has achieved a narrow spectral width and a strong polarization rotation signal.

Proceedings Article | 8 May 2010 Paper

Sensitive optical atomic magnetometer based on nonlinear magneto-optical rotation

Chris Hovde, Brian Patton, Eric Corsini, James Higbie, Dmitry Budker

Proceedings Volume 7693, 769313 (2010) https://doi.org/10.1117/12.850302

KEYWORDS: Magnetometers, Magnetism, Sensors, Rubidium, Magnetic sensors, Polarization, Laser beam diagnostics, Modulators, Chemical species, Optical fibers

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Proceedings Article | 5 October 2007 Paper

Toward precision measurements of methane with interband cascade lasers

Chris Hovde, Daniel Oh, Mark Zondlo, Chul Soo Kim, Mijin Kim, William Bewley, Chadwick Canedy, Igor Vurgaftman, Jerry Meyer

Proceedings Volume 6756, 67560B (2007) https://doi.org/10.1117/12.734215

KEYWORDS: Methane, Quantum cascade lasers, Modulation, Sensors, Precision measurement, Carbon, Semiconductor lasers, Analytical research, Optical testing, Laser development

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Proceedings Article | 25 October 2006 Paper

Detecting ammonia and methane with antimonide lasers

Chris Hovde, David Bomse

Proceedings Volume 6378, 63780H (2006) https://doi.org/10.1117/12.685399

KEYWORDS: Methane, Modulation, Mirrors, Quantum cascade lasers, Laser applications, Gases, Temperature metrology, Sensors, Semiconductor lasers, Absorption

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Proceedings Article | 5 November 2005 Paper

Gas imaging with wavelength modulation spectroscopy and a micromirror array

Chris Hovde, Shin-Juh Chen, Kristen Peterson, Mark Paige

Proceedings Volume 5995, 59950I (2005) https://doi.org/10.1117/12.630770

KEYWORDS: Modulation, Sensors, Micromirrors, Mirrors, Absorption, Signal processing, Imaging systems, Spectroscopy, Doppler effect, Speckle

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Proceedings Article | 23 September 2002 Paper

Early fire sensing using near-IR diode laser spectroscopy

David Bomse, D. Christian Hovde, Shin-Juh Chen, Joel Silver

Proceedings Volume 4817, (2002) https://doi.org/10.1117/12.452097

KEYWORDS: Carbon monoxide, Gases, Digital signal processing, Modulation, Semiconductor lasers, Gas lasers, Sensors, Demodulation, Absorption, Hydrogen

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Proceedings Article | 21 October 1996 Paper

Applications of diode laser spectroscopy to environmental and industrial process monitoring

Alan Stanton, Joel Silver, David Bomse, Daniel Oh, D. Christian Hovde, Mark Paige, Daniel Kane

Proceedings Volume 2834, (1996) https://doi.org/10.1117/12.255337

KEYWORDS: Semiconductor lasers, Gases, Absorption, Laser applications, Vertical cavity surface emitting lasers, Gas lasers, Laser development, Diodes, Laser spectroscopy, Environmental monitoring

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