Frequency chirps and spectra of optical pulses propagating in optical fibers with cubic-quintic nonlinearity
-
1.
Department of Optoelectronics and Technology, Chengdu University of Information Technology, Chengdu 610041, China;
-
2.
School of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China
-
Received Date:
2005-07-14
Accepted Date:
2005-09-27
-
Abstract
The aim of the paper is to study the effect of the quintic nonlinearity of an optical fiber on the propagation of optical pulses.Utilizing the cubic-quintic nonlinear Schrdinger equation in which the dispersion of optical fibers is neglected,the nonlinear phase shifts and frequency chirps of super-Gaussian optical pulses are calculated and investigated analytically.The power spectra of optical pulses are numerically simulated as well.The results show that the positive quintic nonlinear refractive index makes the nonlinear phase shifts and the maximum frequency chirps of optical pulses larger,the spectral width of unchirped optical pulses wider and the number of spectral peaks more than those of cubic nonlinear refractive index.The influence of initial chirps of Gaussian optical pulses on the spectra is similar to that of cubic nonlinear refractive index.In case of the negative quintic nonlinear refractive index,the nonlinear phase shifts and frequency chirps take on new characteristics.The negative quintic nonlinear refractive index also makes the width of unchirped optical pulses narrower and the number of spectral peaks less.
-
-
References
|
[1]
|
TZOAR N,JAIN M.Self-phase modulation in long geometry optical waveguides[J].Phys Rev,1981,A23(3):1266～1270. |
|
[2]
|
HEBER R C,HICKMANN J M,GOUVEIA-NETO A S.Self-phase modulation and induced phase modulation of noisy radiation in single-mode optical fibers[J].Phys Rev,1992,A45(11):8268～8276. |
|
[3]
|
AGRAWAL G P.Nonlinear fiber optics[M].2nd ed,New York:Academic Press,1995.89～101,238～276. |
|
[4]
|
SUKHORUKOV A A,KIVSHAR Y S,EISENBERG H S et al.Spatial optical solitons in waveguide arrays[J].IEEE J Q E,2003,39(1):31～50. |
|
[5]
|
WANG X,LU D,LIN X D et al.Power gain of perturbation traveling inside amplifying nonlinear media in terms of Breakup-integral[J].Laser Technology,2002,26(6):466～467,470(in Chinese). |
|
[6]
|
LI D Y,HAN S,TANG Y L et al.Propagation of chirped pulses inside self-action temporal guide[J].Laser Technology,1999,23(2):109～112.(in Chinese). |
|
[7]
|
TANEV S,PUSHKAROV D I.Solitary wave propagation and bistability in the normal dispersion region of highly nonlinear optical fibers and waveguides[J].Opt Commun,1997,141:322～328. |
|
[8]
|
PALACIOS S L,FERNNDEZ-DíAZ J M.Black optical solitons for metia with parabolic nonlinearity law in the presence of fourth order dispersion[J].Opt Commun,2000,178:457～460. |
|
[9]
|
DIMITREVSKI K,REIMHULT E,SVENSSON E et al.Analysis of stable self-trapping of laser beams in cubic-quintic nonlinear media[J].Phys Lett,1998,A248(5/6):369～376. |
|
[10]
|
ZHONG X Q,CHEN J G,LI D Y.Modulation instability in the decreasing dispersion fibers with quintic nonlinearity[J].Laser Technology,2006,30(1):27～30(in Chinese). |
|
[11]
|
REN Z J,WANG J,YANG A L et al.Effect of quintic nonlinearity on modulation instability in the anomalous dispersion regime of fiber[J].Chinses Journal of Laser,2004,31(5):595～598(in Chinese). |
|
[12]
|
HONG W P.Modulation instability of optical waves in the high dispersive cubic-quintic nonlinear Schrodinger equation[J].Opt Commun,2002,213:173～182. |
-
-
Proportional views
-
Map
DownLoad: