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Patrick Ehlers
Patrick Ehlers
Verified email at physics.umu.se
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Fiber-laser-based noise-immune cavity-enhanced optical heterodyne molecular spectrometry instrumentation for Doppler-broadened detection in the 10^{−12} cm^{− 1} Hz^{−1/2} region
P Ehlers, I Silander, J Wang, O Axner
JOSA B 29 (6), 1305-1315, 2012
472012
Frequency modulation background signals from fiber-based electro optic modulators are caused by crosstalk
I Silander, P Ehlers, J Wang, O Axner
JOSA B 29 (5), 916-923, 2012
402012
Distributed-feedback-laser-based NICE-OHMS in the pressure-broadened regime
A Foltynowicz, J Wang, P Ehlers, O Axner
Optics Express 18 (18), 18580-18591, 2010
352010
Use of etalon-immune distances to reduce the influence of background signals in frequency-modulation spectroscopy and noise-immune cavity-enhanced optical heterodyne molecular …
P Ehlers, AC Johansson, I Silander, A Foltynowicz, O Axner
JOSA B 31 (12), 2938-2945, 2014
342014
NICE-OHMS—frequency modulation cavity-enhanced spectroscopy—principles and performance
O Axner, P Ehlers, A Foltynowicz, I Silander, J Wang
Cavity-Enhanced Spectroscopy and Sensing, 211-251, 2014
342014
Doppler-broadened noise-immune cavity-enhanced optical heterodyne molecular spectrometry down to 4  ×  10−13  cm−1 Hz−1/2: implementation of a 50 …
I Silander, T Hausmaninger, W Ma, P Ehlers, O Axner
Optics Letters 40 (9), 2004-2007, 2015
282015
Dicke narrowing in the dispersion mode of detection and in noise-immune cavity-enhanced optical heterodyne molecular spectroscopy—theory and experimental verification
J Wang, P Ehlers, I Silander, O Axner
JOSA B 28 (10), 2390-2401, 2011
232011
Fiber-laser-based noise-immune cavity-enhanced optical heterodyne molecular spectrometry incorporating an optical circulator
P Ehlers, I Silander, J Wang, A Foltynowicz, O Axner
Optics Letters 39 (2), 279-282, 2014
212014
Speed-dependent Voigt dispersion line-shape function: applicable to techniques measuring dispersion signals
J Wang, P Ehlers, I Silander, J Westberg, O Axner
JOSA B 29 (10), 2971-2979, 2012
212012
Doppler broadened noise-immune cavity-enhanced optical heterodyne molecular spectrometry: optimum modulation and demodulation conditions, cavity length, and modulation order
P Ehlers, I Silander, O Axner
JOSA B 31 (9), 2051-2060, 2014
182014
On the accuracy of the assessment of molecular concentration and spectroscopic parameters by frequency modulation spectrometry and NICE-OHMS
J Wang, P Ehlers, I Silander, O Axner
Journal of Quantitative Spectroscopy and Radiative Transfer 136, 28-44, 2014
172014
Speed-dependent effects in dispersion mode of detection and in noise-immune cavity-enhanced optical heterodyne molecular spectrometry: experimental demonstration and validation …
J Wang, P Ehlers, I Silander, O Axner
JOSA B 29 (10), 2980-2989, 2012
152012
Doppler broadened NICE-OHMS beyond the triplet formalism: assessment of optimum modulation index
P Ehlers, J Wang, I Silander, O Axner
JOSA B 31 (7), 1499-1507, 2014
132014
Doppler broadened NICE-OHMS—optimum modulation and demodulation conditions, cavity length, and modulation order
P Ehlers, I Silander, O Axner
J. Opt. Soc. Am. B 31, 2051-2060, 2014
72014
Noise-immune cavity-enhanced analytical atomic spectrometry—NICE-AAS—A technique for detection of elements down to zeptogram amounts
O Axner, P Ehlers, T Hausmaninger, I Silander, W Ma
Spectrochimica Acta Part B: Atomic Spectroscopy 100, 211-235, 2014
32014
Further development of NICE-OHMS:–an ultra-sensitive frequency-modulated cavity-enhanced laser-based spectroscopic technique for detection of molecules in gas phase
P Ehlers
Umeå universitet, 2014
32014
Further development of NICE-OHMS–an ultra-sensitive frequency-modulated cavity-enhanced
P Ehlers
2014
Development of laser-based spectrometric techniques for sensitive detection of gases
P Ehlers, I Silander, J Wang, J Westberg, O Axner
Fast non-approximate methodology for calculation of wavelength modulated (WM) Voigt line shape functions for curve fitting at kHz rates
P Ehlers, J Westberg, J Wang, O Axner
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Articles 1–19