Spectral dynamics of noise-like square pulses generated in a Tm-doped figure-8 fiber laser

• Published in: Optics and laser technology Vol. 156; p. 108595
• Main Authors: Huang, Jinjer, Sun, Ying, Xie, Yanan, Zhang, Xinlu
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2022
• Subjects: Flat-topped spectrum; Mode-locking; Noise-like square pulse; Spectral dynamics; Mode-locking; Flat-topped spectrum; Noise-like square pulse; Spectral dynamics

•Noise-like square pulse obtains a square shape in the spectral domain.•The pulse demonstrates a spectral resonance with a 3-dB variation: 10–20 nm.•Simulation approximately reproduced the flat-topped spectra and spectral resonance.•Analysis shows that the flat gain dispersion accounts for the flat...