Multipulse dynamics under dissipative soliton resonance conditions

Abstract

The stable multipulse emission from an erbium-doped mode-locked fiber laser in dissipative soliton resonance (DSR) regime is numerically and experimentally investigated. It shows that in the multipulse operation of DSR, all pulses have identical characteristics. The number of these pulses is determined by the initial conditions, and keeps constant with the growth of pump power. Experimental results match well with the theoretical simulations. In the experiment, we obtain as high as 86 dual-wavelength DSR pulses, which have the same characteristics and are equally spaced in the cavity. Since the pulses behave similarly to harmonic mode-locking (HML), we call this phenomenon HML under DSR. By properly adjusting the polarization controllers, other numbers of multipulse emission in DSR region can be observed, which confirms that the number of DSR pulses depends on the initial conditions.

Splitting and Motions of Dissipative Soliton Resonance Pulses in Mode-Locked Fiber Lasers

“…Several previous theoretical works have studied the multipulse dynamics of DSR [31,33,35]. To generate multiple DSR pulses, all these simulations required a multipulse initial field, and during the evolution from the initial field to multiple DSR pulses, no pulse splitting process was found.…”

“…In 2016, Armas-Rivera et al have observed that a single DSR pulse splits into two equidistant trapezoidalshaped DSR pulses by roundtrip at sufficiently high pump power [32]. In 2017, we have developed a harmonic DSR Er-dope fiber laser mode-locked by non-linear polarization rotation and numerically investigated its multipulse dynamics [33,34]. Recently, Chowdhury et al have observed DSR pulse splitting by rotating polarization controllers in an all-normal dispersion non-linear amplifying loop mirror based mode-locked Yb-doped fiber laser, and they have also numerically studied the multipulse dynamics of DSR with multipulse input field [35].…”

Towards visible-wavelength passively mode-locked lasers in all-fibre format

“…In addition, the modelocking element used in our simulation is an NALM that induces a periodic saturable absorption effect. The NALM's power-dependent transmission coefficient curves can be well fitted by the following equation 42 :…”

Alternation of the Mode Synchronization and Desynchronization in Ultrafast Fiber Laser

“…Coherent pulses with high quality mode‐locking known as dissipative solitons present a simple variant of a balance between key physical cavity effects. In addition to the coherent DS, various partially coherent and incoherent spatiotemporal structures can exist in the dissipative systems, which can be regarded as the chaotic attractors of the dissipative systems and transformed by tuning the parameters of the laser system . Laser systems are naturally described by the mathematical Poincaré mapping in the phase space of the key field parameters.…”