摘要A self-similar mode locked fibre laser is studied based on a numerical model. By introducing a dimensionless factor k to characterize the pulse shape, the self-similar pulse evolution, formation and the temporal and spectral shape changes due to the elements in the cavity are investigated throughout the laser cavity. The results show that in the self-similar mode locked fibre laser, self-similar pulse is first formed in the single-mode fibre, which is then amplified in the gain fibre. Gain bandwidth has a small influence on pulse shape, so high energy self-similar pulse can be obtained after amplification. Because net cavity dispersion directly influences the pulse width as well as peak power after compression by a pair of gratings, which can determine the pulse self-similar evolution, it is very important to control the net cavity dispersion to a certain range to obtain self-similar pulses.
Abstract：A self-similar mode locked fibre laser is studied based on a numerical model. By introducing a dimensionless factor k to characterize the pulse shape, the self-similar pulse evolution, formation and the temporal and spectral shape changes due to the elements in the cavity are investigated throughout the laser cavity. The results show that in the self-similar mode locked fibre laser, self-similar pulse is first formed in the single-mode fibre, which is then amplified in the gain fibre. Gain bandwidth has a small influence on pulse shape, so high energy self-similar pulse can be obtained after amplification. Because net cavity dispersion directly influences the pulse width as well as peak power after compression by a pair of gratings, which can determine the pulse self-similar evolution, it is very important to control the net cavity dispersion to a certain range to obtain self-similar pulses.
[1] Buckley J R, Wise F W, Ilday F \"O and Sosnowski T 2005 CLEO, CTuK4 [2] Anderson D, Desaix M, Lisak M and Quiroga-Teixeiro M L 1992 Opt. Soc. Am. B 9 1358 [3] Nelson L E, Fleischer S B, Lenz G and Ippen E P 1996 Opt.Lett. 21 1759 [4] Fermann M E, Kruglov V I, Thomsen B C, Dudley J M and HarveyJ D 2000 Phys. Rev. Lett. 84 6010 [5] Kruglov V I, Peacock A C, Harvey J D and Dudley J M 2002 Opt. Soc. Am. B 19 461 [6] Ilday F, Buckley J R, Clark W G and Wise F W 2004 Phys.Rev. Lett. 92 213902-1 [7] Buckley J R, Wise F W, Ilday F \"O and Sosnowski T 2005 Opt. Lett. 30 1888 [8] Ruehl A, Prochnow O, Wandt D, Kracht D, Burgoyne B, Godbout N andLacroix S 2006 Opt. Lett. 31 2734 [9] Kalosha V P, Chen L and Bao X Y 2006 Opt. Exp. 14 4935 [10] Latkin A and Turitsyn S 2006 ICTON 259 [11] Anderson D, Desaix M, Karlsson M, Lisak M and Quiroga-Teixeiro M L1993 Opt. Soc. Am. B 10 1185
2007, Vol. 24 
