| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 734327 | Optics & Laser Technology | 2016 | 7 Pages |
•(1+1)D variable coefficient GNLSE with Scarff II PT-symmetric potential is solved.•The temporal soliton solution is found in Scarff II PT-symmetric potential.•Propagation characteristics of temporal soliton are analyzed by intensity moments.•Our results will be helpful to manipulation of nonlinear propagation of laser pulses.
When a temporal soliton propagates in the inhomogeneous nonlinear medium with Scarff II parity-time (PT)-symmetric potential, we investigate the propagation characteristics of a temporal soliton based on intensity moments. Under the condition of Scarff II PT-symmetric potential, the propagation characteristics of a temporal soliton are affected by the dispersion coefficient, nonlinear coefficient and chirp. After a detailed analysis of the intensity evolution and the second-order intensity moment parameter, we find that the intensity and pulse width (PW) of a chirped-free temporal soliton are invariant during nonlinear propagation when the dispersion coefficients are the constant, exponential decreasing function and periodic modulated function, respectively. The intensity and PW of a chirped temporal soliton vary periodically when the dispersion coefficient is a periodic modulated function. So the chirp has no effect on propagation behavior of a temporal soliton. When the dispersion coefficients are the constant or exponential decreasing function, the intensity of a chirped temporal soliton is gradually increased, while the PW of a chirped temporal soliton is gradually decreased. Thus the temporal soliton is compressed and the chirp has a great effect on the propagation behavior of a temporal soliton. The results will be helpful to manipulation of nonlinear propagation of the laser pulses.
