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Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN Печать: 0040-2508
ISSN Онлайн: 1943-6009

Выпуски:
Том 78, 2019 Том 77, 2018 Том 76, 2017 Том 75, 2016 Том 74, 2015 Том 73, 2014 Том 72, 2013 Том 71, 2012 Том 70, 2011 Том 69, 2010 Том 68, 2009 Том 67, 2008 Том 66, 2007 Том 65, 2006 Том 64, 2005 Том 63, 2005 Том 62, 2004 Том 61, 2004 Том 60, 2003 Том 59, 2003 Том 58, 2002 Том 57, 2002 Том 56, 2001 Том 55, 2001 Том 54, 2000 Том 53, 1999 Том 52, 1998 Том 51, 1997

Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v74.i7.50
pages 619-628

INFLUENCE OF THE REFRACTIVE INEX ANISOTROPY ON THE OPTICAL AND EMISSION CHARACTERISTICS OF LASER MATRICES BASED ON THE DYE-DOPED POLYURETHANES

S. V. Nikolaev
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
V. V. Pozhar
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
M. I. Dzyubenko
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine

Краткое описание

Recently, increased interest has been shown toward investigations oriented at the creation of efficient solid-state dye lasers. The majority of these investigations are focused on synthesizing solid active media on the basis of transparent polymers of various chemical natures. One class of the polymers that can be used in the laser technologies is represented by the polyurethane and its derivatives. The polyurethane media have been studied much poorly as compared with other kinds of the polymeric media. In particular, this concerns their optical properties. The study is aimed at analyzing the causes for occurrence of refractive index anisotropy in active polyurethane materials and investigating its influence on the optical and emission characteristics of laser matrices. It is ascertained that the optically anisotropic state of the medium is called forth by both the internal stresses of the polyurethane due to intermolecular interaction and thermal stresses induced by the powerful pumping. It is shown that the optical anisotropy results in the local birefringence effect in the media. The influence of the birefringence induced by the transverse pumping on the laser emission polarization is investigated. It is shown that under such conditions the active polyurethane elements generate a polarized emission even being excited by unpolarized light.


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