Filament-initiated lasing in neutral molecular nitrogen

Daniil Kartashov, Mikhail N. Shneider, Andrius Baltuska

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Modern optical spectroscopy of the atmosphere at high altitudes relies primarily on the powerful and well-established LIDAR technique. A ground-based (or air−/space-borne) laser source is used for standoff linear measurements of the scattering characteristics of molecular, atomic, or particle species in the air in different scattering regimes (Rayleigh, Mie, spontaneous Raman). The incoherent nature of the scattered field measured in the backward direction sets practical limitation on the tracing distance, spatial resolution, and the species-dependent sensitivity threshold. The possibility of standoff initiation of a coherent source of backward-directed radiation in the sky would enable application of different methods of nonlinear optics, such as stimulated Raman scattering, CARS, etc., for the highly sensitive and highly selective spectroscopy of the atmosphere at high altitudes (Hemmer et al. PNAS 108, 3130, 2011; Yuan et al. Laser Phys. Lett. 8, 736, 2011) with (potentially) significantly larger detection range and finer spatial resolution. One of the possibilities to initiate such standoff coherent source of radiation in the atmosphere can be provided by achieving population inversion and laser generation in one of the two main atmospheric constituents, nitrogen (≈78% concentration) and oxygen (≈21% concentration). In principle, both gases allow population inversion and laser generation.

Original languageEnglish (US)
Title of host publicationSpringer Series in Optical Sciences
PublisherSpringer Verlag
Pages89-120
Number of pages32
DOIs
StatePublished - 2018

Publication series

NameSpringer Series in Optical Sciences
Volume208
ISSN (Print)0342-4111
ISSN (Electronic)1556-1534

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials

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