Mode-locked 2.8-μm fluoride fiber laser: from soliton to breathing pulse

Abstract

The mode-locked fluoride fiber laser (MLFFL) is an exciting platform for directly generating ultrashort pulses in the mid-infrared (mid-IR). However, owing to difficulty in managing the dispersion in fluoride fiber lasers, MLFFLs are restricted to the soliton regime, hindering pulse-energy scaling. We overcame the problem of dispersion management by utilizing the huge normal dispersion generated near the absorption edge of an infrared-bandgap semiconductor and promoted MLFFL from soliton to breathing-pulse mode-locking. In the breathing-pulse regime, the accumulated nonlinear phase shift can be significantly reduced in the cavity, and the pulse-energy-limitation effect is mitigated. The breathing-pulse MLFFL directly produced a pulse energy of 9.3 nJ and pulse duration of 215 fs, with a record peak power of 43.3 kW at 2.8 μm. Our work paves the way for the pulse-energy and peak-power scaling of mid-IR fluoride fiber lasers, enabling a wide range of applications.

MOF‐Derived Porous Dodecahedron rGO‐Co3O4 for Robust Pulse Generation

“…), owing to their fascinating chemical and physical properties, have been in a state of vigorous development and rapid advances for applications in optoelectronics, biology, catalysis and energy. [6][7][8][9][10][11][12][13] Metal organic framework (MOF) is a kind of porous crystalline inorganic organic hybrid material composed of metal ions or clusters and multifunctional organic ligands. [14] Due to its unique structure, [15] MOF has attracted the attention of many disciplines.…”

TMO‐Derived γ‐MnO2Nanosheets for Harmonic Soliton Molecule Pulses Generation

“…[ 63 ] The formation of the soliton pulse means that the dispersion and nonlinear effects in the ring cavity are balanced. [ 77 ] As shown in Figure 6f, The CW emission is at 1558 nm and soliton emission is at 1530 nm, characterized by spectral broadening and a synchronized pulse pair on the oscilloscope traces. The pulse interval is 196 ns, which is equal to the cavity round trip time.…”

Temporal-filtering dissipative soliton in an optical parametric oscillator

“…The output pulse has a wide spectrum with steep edges, and the pulse duration is 1.3 ps assuming a sech 2 profile. The output pulse was dechirped by a germanium rod with a length of 12 mm (providing a dispersion of 2.77 × 10 4 fs 2 ) [ 39 ] and compressed to 96 fs with a compression ratio of approximately 14. The results indicate that a temporal-filtering dissipative soliton is also formed for the negative nonlinear phase shift and anomalous dispersion.…”