The UNT College of Arts and Sciences educates students in traditional liberal arts, performing arts, sciences, professional, and technical academic programs. In addition to its departments, the college includes academic centers, institutes, programs, and offices providing diverse courses of study.
This article discusses the coherence brightened laser source for atmospheric remote sensing.
Physical Description
6 p.
Notes
Abstract: We have studied coherent emission from ambient air and demonstrated efficient generation of laser-like beams directed both forward and backward with respect to a nanosecond ultraviolet pumping laser beam. The generated optical gain is a result of two-photon photolysis of atmospheric O2, followed by two-photon excitation of atomic oxygen. We have analyzed the temporal shapes of the emitted pulses and have observed very short duration intensity spikes as well as a large Rabi frequency that corresponds to the emitted field. Our results suggest that the emission process exhibits nonadiabatic atomic coherence, which is similar in nature to Dicke superradiance where atomic coherence is large and can be contrasted with ordinary lasing where atomic coherence is negligible. This atomic coherence in oxygen adds insight to the optical emission physics and holds promise for remote sensing techniques employing nonlinear spectroscopy.
Publication Title:
Proceedings of the National Academy of Sciences (U.S.)
Volume:
109
Issue:
38
Page Start:
15185
Page End:
15190
Pages:
6
Peer Reviewed:
Yes
Collections
This article is part of the following collection of related materials.
UNT Scholarly Works
Materials from the UNT community's research, creative, and scholarly activities and UNT's Open Access Repository. Access to some items in this collection may be restricted.
Traverso, Andrew J.; Sanchez-Gonzalez, RodrigoTe; Yuan, Luqi; Wang, Kai; Voronine, Dmitri V.; Zheltikov, Aleksei M. et al.Coherence Brightened Laser Source for Atmospheric Remote Sensing,
article,
September 18, 2012;
[Washington, D.C.].
(https://digital.library.unt.edu/ark:/67531/metadc725804/:
accessed September 20, 2024),
University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu;
crediting UNT College of Arts and Sciences.
