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Gerard Wysocki
Princeton University
263Publications
26H-index
3,016Citations
Publications 256
Newest
#1Chao Yan (Princeton University)
#2Chu C. Teng (Princeton University)H-Index: 2
Last.Yiguang Ju (Princeton University)H-Index: 57
view all 9 authors...
Abstract Understanding the multi-channel dynamics of O(1D) reactions with unsaturated hydrocarbon molecules in low temperature reaction kinetics is critically important in stratospheric chemistry, plasma chemistry, plasma assisted fuel reforming, materials synthesis, and plasma assisted combustion. A photolysis flow reactor coupled with highly selective mid-infrared Faraday Rotation Spectroscopy (FRS) and direct ultraviolet-infrared (UV-IR) absorption spectroscopy (DAS) techniques was developed ...
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#1Tao FengH-Index: 7
#2Leon ShterengasH-Index: 22
Last.Gregory BelenkyH-Index: 26
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#1Mahmood BagheriH-Index: 10
#2Clifford FrezH-Index: 8
Last.Gerard WysockiH-Index: 26
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#1Eric J. Zhang (IBM)H-Index: 7
#2Lionel Tombez (IBM)H-Index: 8
Last.William M. J. Green (IBM)H-Index: 36
view all 5 authors...
The authors present an adaptive algorithm based on a non-linear regression model for mitigating time-varying etalon drifts in line-scanned optical absorption spectrometers. By dynamically varying the etalon spectral background using physically realistic degrees of freedom, the authors’ dynamic etalon fitting-routine (DEF-R) significantly increases the spectral baseline recalibration interval as compared to conventional fringe subtraction models. They provide an empirical demonstration of the eff...
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#1Lukasz A. Sterczewski (Princeton University)H-Index: 5
#2Jonas Westberg (Princeton University)H-Index: 8
Last.Gerard Wysocki (Princeton University)H-Index: 26
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Hyperspectral imaging is a spectroscopic imaging technique that allows for the creation of images with pixels containing information from multiple spectral bands. At terahertz wavelengths, it has emerged as a prominent tool for a number of applications, ranging from nonionizing cancer diagnosis and pharmaceutical characterization to nondestructive artifact testing. Contemporary terahertz imaging systems typically rely on nonlinear optical downconversion of a fiber-based near-infrared femtosecond...
1 CitationsSource
#1Eric J. ZhangH-Index: 7
#2Chu C. TengH-Index: 2
Last.William M. J. GreenH-Index: 36
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We present field deployment results of a portable optical absorption spectrometer for localization and quantification of fugitive methane (CH4) emissions. Our near-infrared sensor targets the 2ν3 R(4) CH4 transition at 6057.1 cm−1 (1651 nm) via line-scanned tunable diode-laser absorption spectroscopy (TDLAS), with Allan deviation analysis yielding a normalized 2.0 ppmv∙Hz−1/2 sensitivity (4.5 × 10−6 Hz−1/2 noise-equivalent absorption) over 5 cm open-path length. Controlled CH4 leak experiments a...
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#1Michael G. Soskind (Princeton University)H-Index: 2
#2Yifeng Chen (Princeton University)H-Index: 1
Last.Gerard Wysocki (Princeton University)H-Index: 26
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The recent developments in instrumentation for mobile field deployment of a chirped laser dispersion spectroscopy is discussed, including optomechanical considerations, system signal fidelity, and real-time target tracking for chemical plume detection.
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#1Yifeng Chen (Princeton University)H-Index: 1
#2Michael G. Soskind (Princeton University)H-Index: 2
Last.Gerard Wysocki (Princeton University)H-Index: 26
view all 7 authors...
We present a real-time chirped laser dispersion spectrometer capable of distinguishing path-averaged methane leaks 0 to 8 ppm above the ∼ppm background methane level using low reflectivity (down to 0.01%) surfaces 50 m away. © 2019 The Author(s)
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#1Eric J. Zhang (IBM)H-Index: 7
#2Yves Martin (IBM)H-Index: 16
Last.William M. J. Green (IBM)H-Index: 36
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We present a monolithically integrated photonic sensor incorporating an on-chip 111- V laser, detector, sealed reference cell, and sensing waveguide capable of near-infrared absorption spectroscopy of methane near λ = 1651 nm. Sub-100 pprnv-Hz−1/2 sensitivities are demonstrated. © 2019 The Author(s)
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#1Chu C. Teng (Princeton University)H-Index: 2
#2Jonas Westberg (Princeton University)H-Index: 8
Last.Gerard Wysocki (Princeton University)H-Index: 26
view all 3 authors...
Stabilization of quantum-cascade-laser frequency combs by means of external optical feedback is presented. Experimental results suggest reduced phase-noise in the frequency comb, allowing comb operation in previously unstable regimes. © 2019 The Authors
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