Frequenzmodulation und Kompression ultrakurzer Lichtimpulse

1970 ◽  
Vol 25 (11) ◽  
pp. 1626-1642 ◽  
Author(s):  
A. Laubereau ◽  
D. Von Der Linde

Abstract Expressions are given for the phase modulation by the optical Kerr effect and the resulting frequency broadening of an optical pulse with elliptical polarization. The compression method is discussed for a quantitative comparison with experimental investigations. Starting with single pulses of 20 ps duration and 0.4 cm -1 frequency width, generated by a mode-locked laser and an optical switching device, the phase modulation in an external cell containing CS2 produced a frequency broadening of 5 cm-1 typically. A compression factor of 5 is achieved in a system consisting of one optical grating and a reflection prism. Satisfactory agreement between theory and experiment is obtained for the frequency modulation Δω) and the compression length l. Our data suggest that the time dependence of our input pulses is symmetric with wings of higher power than those of a Gaussian pulse.

Author(s):  
H. I. Abdel-Gawad

Self-phase modulation (SPM) induces a varying refractive index of the medium due to the optical Kerr effect. The optical waves propagation (OWP) in a medium with SPM occupied a remarkable area of research in the literature. A model equation to describe OWP in the absence of SPM was proposed very recently by Biswas–Arshed equation (BAE). This work is based on constructing the solutions that describe the waves which arise from soliton-periodic wave collisions. A variety of geometric optical wave structures are observed. Here, a transformation that allows to investigate the multi-geometric structures of OW’s result from soliton-periodic wave collisions is introduced. Chirped, conoidal, breathers, diamond and W-shaped optical waves are shown to propagate in the medium in the absence of SPM. The exact solutions of BAE are obtained by using the unified method, which was presented recently. We mention that the results found here, are completely new.


Author(s):  
K. Postava ◽  
A. Maziewski ◽  
A. Stupakiewicz ◽  
A. Wawro ◽  
L. T. Baczewski ◽  
...  

2020 ◽  
Vol 62 (9) ◽  
pp. 1619-1623
Author(s):  
P. A. Usachev ◽  
V. N. Katz ◽  
V. V. Pavlov

2021 ◽  
Vol 11 ◽  
pp. 1245-1259
Author(s):  
M. Jovičević-Klug ◽  
P. Jovičević-Klug ◽  
J. McCord ◽  
B. Podgornik

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