Broadband dual-comb spectroscopy for open-path field measurement of H216O and H218O

Autor: Fabrizio R. Giorgetta, Nathan R. Newbury, Brian R. Washburn, Kevin C. Cossel, Brett DePaola, Daniel I. Herman, Ian Coddington, Jacob M. Cutshall, Lindsay C. Hutcherson, Nathan A. Malarich, Chinthaka Weerasekara, Stephen Welch, Eduardo A. Santos

Publikováno v: OSA Optical Sensors and Sensing Congress 2021 (AIS, FTS, HISE, SENSORS, ES).

Simultaneous retrieval of H216O and H218 concentrations at an agricultural site is demonstrated using near-infrared open-path dual-comb spectroscopy (DCS). Initial retrievals of the isotopologue ratio δ18O have a statistical precision of 5‰ at one

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4c4b50d3783f7c38a942dd5577160fc3
https://doi.org/10.1364/ais.2021.jtu6e.5

Comparison of Livestock Emissions Measurements Using Open-Path Dual-Comb Spectroscopy and Closed-Path Cavity Ring-Down Spectroscopy

Autor: Brett DePaola, Fabrizio R. Giorgetta, Gabriel M. Colacion, Stephen Welch, Eduardo A. Santos, Chinthaka Weerasekara, Daniel I. Herman, Lindsay C. Hutcherson, Ian Coddington, Nathan R. Newbury, Kevin C. Cossel, Eleanor M. Waxman, Brian R. Washburn

Publikováno v: Optical Sensors and Sensing Congress.

Open-path dual-comb spectroscopy is used to quantify CO2, CH4, H2O and NH3 concentrations adjacent to a cattle feedlot. In all cases except NH3, the data is compared against closed-path cavity ring-down spectroscopy.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a66742e2f052a002614b8b12f0c2330f
https://doi.org/10.1364/ais.2020.aw4i.4

Nanosecond laser writing of straight and curved waveguides in silicon with shaped beams

Autor: Brett DePaola, Pingping Chen, Shuting Lei, Xuefeng Chang, Xiaoming Yu, Hongyu Shi, Matthew J. Berg, Xinya Wang, Lianjie Xue

Publikováno v: Journal of Laser Applications. 32:022002

The authors demonstrate a method for transverse writing of optical waveguides in a crystalline silicon wafer using a nanosecond laser with a shaped beam profile that is formed by a pair of cylindrical lenses. In contrast to traditional writing method

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9b735d451b2fbd346e65b7a7583301f4
https://doi.org/10.2351/1.5139973

MOTRIMS as a generalized probe of AMO processes

Autor: Brett DePaola, X Fléchard, H. Nguyen, Richard Brédy, H. A. Camp

Publikováno v: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Nuclear Instruments and Methods in Physics Research B
International Conference on the Physics of Highly Charged Ions 7 HCI-2002
International Conference on the Physics of Highly Charged Ions 7 HCI-2002, Sep 2002, Caen, France. pp.191-195, ⟨10.1016/S0168-583X(03)00538-X⟩

Magneto-optical trap recoil ion momentum spectroscopy (MOTRIMS) is one of the newest offshoots of the generalized TRIMS approach to ion–atom collisions. By using lasers instead of the more usual supersonic expansion to cool the target, MOTRIMS has

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::91dfdeb38e3ab8fc121465e1ac05eb58
https://doi.org/10.1016/s0168-583x(03)00538-x

Collimated blue and infrared beams generated by two-photon excitation in Rb vapor

Autor: Brett DePaola, Randall J. Knize, M. A. Gearba, Jerry Sell

Publikováno v: Optics letters. 39(3)

Utilizing two-photon excitation in hot Rb vapor we demonstrate the generation of collimated optical fields at 420 nm and 1324 nm. Input laser beams at 780 nm and 776 nm enter a heated Rb vapor cell collinear and circularly polarized, driving Rb atoms

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da18d156f7a93ba822338d0dd5ac565d
https://pubmed.ncbi.nlm.nih.gov/24487857