november 2010 volume 1 number 2 - Advances in Electronics and ...

62 ADVANCES IN ELECTRONICS AND TELECOMMUNICATIONS, VOL. 1, NO. 2, NOVEMBER 2010
Fig. 1. Evolution of the first-order soliton (N = 1) over one soliton period.
the core, then the optimal value of the normalized frequency
Vopt ofthemodeledstepindexfiberisalsoincreasing.Increase
of Vopt implies increase of zero dispersion wavelength λZD
and cut off wavelength λC, which are equal in case of
normalized frequency optimization. Additionally, growth of
Vopt value is responsible for rise of the average power curried
by the core P1. There is only one more parameter which
value is increasing when mol % doping of germaniumdioxide
is increasing. It is nonlinear parameter γ, which in turn is
responsible for decreasing the peak power needed to generate
fundamental soliton in each case of step index fiber modeling
process. Furthermore, decrease of dispersion parameter D
and absolute value of group velocity dispersion parameter
β2 is responsible for increase of dispersion length LD and
value of the soliton period z0. Fundamental disadvantage
of increasing λZD and λC is decreasing of bright soliton
generation region ∆λZD and single mode operation region
∆λC, which are essential in wavelength division multiplexing
technique application.
REFERENCES
[1] G. P.Agrawal, Nonlinear Fiber Optics, third edition ed. Academic Press,
2001.
[2] ——, Applications of Nonlinear Fiber Optics. Academic Press, 2001.
[3] ——, Fiber-Optic Communication Systems. John Wiley & Sons, 2002.
[4] E. Iannone, F. Matera, A. Mecozzi, and M. Settembre, Nonlinear Optical
Communication Networks. John Wiley & Sons, 1998.
[5] G. Keiser, Optical Fiber Communications. McGraw-Hill, 1991.
[6] A. Majewski, Teoria i projektowanie ´Swiatłowodów. WNT, Warszawa,
1991, (in Polish).
[7] M. J. Adams, An Introduction to Optical Waveguides. John Wiley &
Sons, 1981.
Tomasz Kaczmarek received the M.Sc. degree in electrical engineering from
Kielce University of Technology in 1994 and the Ph.D. degree in electronic
engineering from Warsaw University of Technology in 2002. Currently he
is the Head of Laboratory of Optical Fiber Technology of the Institute of
Telecommunication, Photonics and Nanomaterials at the Kielce University of
Technology. He authored and co-authored over 30 publications. His current
research interests include fiber optics and nonlinear fiber optics.