Pulse breakup and Raman-shifted solitons in a standard fiber with subnanosecond pumping in the presence of noise

We present a numerical study of the wave breakup and soliton formation in a standard single-mode fiber pumped by variable pulse lengths in the range from 20 to 400 ps in the presence of noise. The average power and the standard deviation of the trailing soliton were calculated. We calculated also the average distance at which the soliton time delay reaches 1.5 times the pulse width. We found that for pulses longer than 100 ps the breakup starts from the amplification of the noisy modulation of the amplitude by the modulation instability mechanism even for very low noise power, while for pulses shorter than 20 ps the breakup starts from the pulse collapse. For intermediate durations, wave breakup starts from the pulse collapse at low noise power, while for higher noise power, modulation instability prevails.

[1]  A. Mussot,et al.  Spectral broadening of a partially coherent CW laser beam in single-mode optical fibers. , 2004, Optics express.

[2]  H P Weber,et al.  Decay of femtosecond higher-order solitons in an optical fiber induced by Raman self-pumping. , 1987, Optics letters.

[3]  Heinz P. Weber,et al.  Ultrashort pulse propagation, pulse breakup, and fundamental soliton formation in a single-mode optical fiber , 1987 .

[4]  Uwe Bandelow,et al.  Supercontinuum generation by the modulation instability , 2005 .

[5]  J R Taylor,et al.  Raman amplification of modulational instability and solitary-wave formation. , 1988, Optics letters.

[6]  R. Stolen,et al.  Extreme picosecond pulse narrowing by means of soliton effect in single-mode optical fibers. , 1983, Optics letters.

[7]  William J. Wadsworth,et al.  Supercontinuum generation in tapered fibers. , 2000, Optics letters.

[8]  N. Nishizawa,et al.  Compact system of wavelength-tunable femtosecond soliton pulse generation using optical fibers , 1999, IEEE Photonics Technology Letters.

[9]  R. Leonhardt,et al.  White-light supercontinuum generation with 60-ps pump pulses in a photonic crystal fiber. , 2001, Optics letters.

[10]  P. V. Mamyshev,et al.  Numerical analysis of the Raman spectrum evolution and soliton pulse generation in single-mode fibers , 1991 .

[11]  C. Goedde,et al.  Increased Stokes pulse energy variation from amplified classical noise in a fiber Raman generator. , 2005, Optics express.

[12]  J. Gordon,et al.  Theory of the soliton self-frequency shift. , 1986, Optics letters.

[13]  E. Dianov,et al.  Stimulated-Raman conversion of multisoliton pulses in quartz optical fibers , 1985 .

[14]  A. Stentz,et al.  Visible continuum generation in air–silica microstructure optical fibers with anomalous dispersion at 800 nm , 2000 .

[15]  L. Mollenauer,et al.  Discovery of the soliton self-frequency shift. , 1986, Optics letters.

[16]  C. Headley,et al.  Continuous-wave pumping in the anomalous- and normal-dispersion regimes of nonlinear fibers for supercontinuum generation. , 2005, Optics letters.