Abstract
We report on the switchable generation of versatile patterns of multiple noise-like pulse (NLP) and dissipative soliton resonance (DSR) pulses in a dual-pump figure-eight mode-locked fiber laser. Benefiting from the change of saturation power influenced by pump power intercoupling, harmonic DSR pulses, dual-pulse DSR, dual-pulse and tri-pulse NLP are formed depending on different pump power combinations and intra-cavity polarization states. We find that the NLP pulse profile can turn from h-shape to triangular-shape after splitting. The dual-wavelength spectrum of the pulse, consisting of an obvious stokes line, can tune its center from 1075 to 1097 nm. This type of fiber laser may be helpful for further in-depth study on the underlying dynamics of multiple NLP and DSR pulses.
Highlights
High energy rectangular-shaped pulses in nanosecond time scales have attracted considerable attention due to their potential applications, including all-optical square-wave clocks, laser micromachining, range finding, and optical sensing [1], [2]
We report on the switchable generation of versatile patterns of multiple noise-like pulse (NLP) and dissipative soliton resonance (DSR) pulses in a dual-pump figure-eight mode-locked fiber laser
Benefiting from the change of saturation power influenced by pump power intercoupling, harmonic DSR pulses, dual-pulse DSR, dual-pulse and tri-pulse NLP are formed depending on different pump power combinations and intra-cavity polarization states
Summary
High energy rectangular-shaped pulses in nanosecond time scales have attracted considerable attention due to their potential applications, including all-optical square-wave clocks, laser micromachining, range finding, and optical sensing [1], [2]. Dissipative soliton resonance (DSR) and noise like pulse (NLP) are two main kinds of rectangular-shaped pulses [3]–[5]. They both have the characteristics of pump-dependent pulse duration and peak power clamping (PPC) effect [6]. Though generation of rectangular NLP and DSR in a fiber laser was reported [7], no pulse breaking phenomenon of the NLP and DSR simultaneously in one laser had appeared before. We report switchable generation of multi-pulse patterns of NLPs and DSRs in one cavity configuration consisting of two pumps with a nonlinear amplifying loop mirror (NALM).
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