All-fiber spatiotemporally mode-locked laser with multimode fiber-based filtering

TL;DR

This paper introduces a novel all-fiber spatiotemporal mode-locked laser utilizing multimode fiber interference-based filtering, achieving higher pulse energy and simpler fabrication compared to previous designs.

Contribution

It demonstrates the first use of multimode fiber interference-based filtering in an all-fiber laser for spatiotemporal mode-locking, with improved pulse energy and simplified construction.

Findings

Generated dissipative soliton pulses at 1036 nm

Achieved pulse energy of 0.5 nJ, four times higher than previous designs

Performed numerical simulations to understand mode-locking dynamics

Abstract

We demonstrate the first multimode fiber interference-based filtering in an all-fiber spatiotemporally mode-locked laser. The oscillator generates dissipative soliton pulses at 1036 nm with 12 mW average power, 6.24 ps duration and 24.3 MHz repetition rate. The reported pulse energy (0.5 nJ) represents ~4 times improvement over the previously reported single-mode all-normal dispersion mode-locked lasers with multimode interference-based filtering. Numerical simulations are performed to reveal cavity and spatiotemporal mode-locking dynamics. The proposed oscillator presents an alternative approach to achieve spatiotemporal mode-locking with an all-fiber design that can be fabricated simply.