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Spectral and temporal response of op...

Dogariu, Arthur.

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Spectral and temporal response of optical nonlinearities.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Spectral and temporal response of optical nonlinearities./
Author:	Dogariu, Arthur.
Description:	256 p.
Notes:	Source: Dissertation Abstracts International, Volume: 58-02, Section: B, page: 0779.
Contained By:	Dissertation Abstracts International58-02B.
Subject:	Physics, General. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9723886
ISBN:	9780591326079

Spectral and temporal response of optical nonlinearities.
Dogariu, Arthur.

Spectral and temporal response of optical nonlinearities. - 256 p.

Source: Dissertation Abstracts International, Volume: 58-02, Section: B, page: 0779.

Thesis (Ph.D.)--University of Central Florida, 1997.

This dissertation reports experiments directed towards nonlinear material characterization. A series of organic molecules, semiconductors, liquid crystals and inorganic clusters are investigated with Z-Scan and excite-probe measurements in order to determine the magnitude and dynamics of their nonlinear absorption and refraction. Much of this work is motivated by our search for a better optical limiter. The nonlinear absorption mechanism leading to optical limiting is investigated and its physical parameters are determined. The reverse saturable absorption spectrum of several organic dyes is obtained in the visible in a single measurement by using an ultrafast nonlinear spectrometer. This system is based on a pump-probe experiment using an ultrashort continuum white-light pulse as probe. The continuum pulses are obtained by focusing millijoule 150 fs pulses at 850 nm into a water cell. The 850 nm wavelength pulses are produced from a Ti:Sapphire oscillator amplified by a Cr

ISBN: 9780591326079Subjects--Topical Terms:

1018488
Physics, General.

Spectral and temporal response of optical nonlinearities.
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008 130610s1997 eng d
020 $a 9780591326079
035 $a (UMI)AAI9723886
035 $a AAI9723886
040 $a UMI $c UMI
100 1 $a Dogariu, Arthur. $3 1924448
245 1 0 $a Spectral and temporal response of optical nonlinearities.
300 $a 256 p.
500 $a Source: Dissertation Abstracts International, Volume: 58-02, Section: B, page: 0779.
500 $a Major Professors: Eric W. Van Stryland; David J. Hagan.
502 $a Thesis (Ph.D.)--University of Central Florida, 1997.
520 $a This dissertation reports experiments directed towards nonlinear material characterization. A series of organic molecules, semiconductors, liquid crystals and inorganic clusters are investigated with Z-Scan and excite-probe measurements in order to determine the magnitude and dynamics of their nonlinear absorption and refraction. Much of this work is motivated by our search for a better optical limiter. The nonlinear absorption mechanism leading to optical limiting is investigated and its physical parameters are determined. The reverse saturable absorption spectrum of several organic dyes is obtained in the visible in a single measurement by using an ultrafast nonlinear spectrometer. This system is based on a pump-probe experiment using an ultrashort continuum white-light pulse as probe. The continuum pulses are obtained by focusing millijoule 150 fs pulses at 850 nm into a water cell. The 850 nm wavelength pulses are produced from a Ti:Sapphire oscillator amplified by a Cr $\ sp{+3} $: LiSAF based regenerative amplifier. By varying the time-delay between the pump and the continuum probe, we have obtained the time evolution of the nonlinear spectra.
520 $a Purely refractive two-beam coupling is demonstrated in transparent Kerr liquids using frequency chirped picosecond pulses with different polarization combinations. Theoretical modeling and experimental results are consistent with energy transfer from transient refractive gratings that are due to stimulated Rayleigh-wing scattering. The signals measured are sensitive to response times considerably shorter than the pulse width. Using a lock-in amplifier detection technique which enables us to measure normalized changes in probe beam energy as low as 10 $\ sp{-5} $ with 100 fs pulses, we demonstrate the possibility of measuring sub-femtosecond Debye-type relaxation times for the nonlinear refractive index. The signals obtained in dielectrics such as SiO $\ sb2 $ and PbF $\ sb2 $ are, however, a signature of the vibrational motion of the nuclei. We use the two-beam coupling signal to obtain the low frequency Raman spectrum for SiO $\ sb2 $ and PbF $\ sb2 $ for detunings from 0 up to 10 THz. We also demonstrate that, by knowing the response time in the case of a Debye relaxation process or the low frequency Raman gain spectrum in the case of a nuclear nonlinearity, we can determine the chirp of the laser pulses.
590 $a School code: 0705.
650 4 $a Physics, General. $3 1018488
650 4 $a Physics, Optics. $3 1018756
690 $a 0605
690 $a 0752
710 2 $a University of Central Florida. $3 1018467
773 0 $t Dissertation Abstracts International $g 58-02B.
790 1 0 $a Stryland, Eric W. Van, $e advisor
790 1 0 $a Hagan, David J., $e advisor
790 $a 0705
791 $a Ph.D.
792 $a 1997
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9723886