Concurrent Passive Mode-Locked and Self- Q -Switched Operation in Laser Systems

Abstract

Concurrent passive mode-locked and self-Q-switched operation of laser devices is modeled using the complex cubic-quintic Ginzburg-Landau equation. Experimental observations use a passively mode-locked fiber ring laser with a waveguide array as a fast saturable absorber. The shape of each individual self-Qswitched pulse and the periodic trains of pairs of such pulses are in a good qualitative agreement with the numerical results.

Q -switching bifurcation dynamics of passively mode-locked lasers

“…Namely, even passively Q-switched lasers can be analyzed based on the solutions of the CGLE. A preliminary analysis and the comparison with experimental data demonstrating this possibility have been provided in [40]. In the present work, we present more numerical simulations that support our claims made in [40].…”

“…A preliminary analysis and the comparison with experimental data demonstrating this possibility have been provided in [40]. In the present work, we present more numerical simulations that support our claims made in [40]. In particular, we expand the range of parameters of the CGLE that has DS solutions that can be interpreted as Q-switched pulses.…”

“…It includes the cases when two, or more, such pulses per period with unequal amplitudes are involved in the evolution [41]. This phenomenon has also been observed in [40,43]. In the present work, we extend the parameter space where these type of pulses can be observed.…”

“…In all previous works, the CGLE has been used for a qualitative analysis of passively mode-locked lasers. However, it was shown, recently, that the power of this technique can be expanded to cover a much larger variety of laser systems [40]. Namely, even passively Q-switched lasers can be analyzed based on the solutions of the CGLE.…”

“…Another form is a Q-switched pulse of triangular shape with a sharp peak at the maximum [41]. This form needs more careful studies as it was observed experimentally [40,42,43]. Moreover, the dynamics of these pulses is more complex than being simply periodic.…”