Femtosecond pulse generation from a Topological Insulator mode-locked fiber laser
Abstract
We reported on the generation of femtosecond pulse in an anomalous-dispersion fiber ring laser by using a polyvinyl alcohol (PVA)-based Topological Insulator (TI), Bi2Se3 saturable absorber (SA). The PVA-TI composite has a low saturable optical intensity of 12 MW/cm2 and a modulation depth of ~3.9%. By incorporating the fabricated PVA-TISA into a fiber laser, mode-locking operation could be achieved at a low pump threshold of 25 mW. After an optimization of the cavity parameters, optical pulse with ~660 fs centered at 1557.5 nm wavelength had been generated. The experimental results demonstrate that the PVA could be an excellent host material for fabricating high-performance TISA, and also indicate that the filmy PVA-TISA is indeed a good candidate for ultrafast saturable absorption device.
Keywords
Cite
@article{arxiv.1402.6529,
title = {Femtosecond pulse generation from a Topological Insulator mode-locked fiber laser},
author = {Hao Liu and Xu-Wu Zheng and Meng Liu and Nian Zhao and Ai-Ping Luo and Zhi-Chao Luo and Wen-Cheng Xu and Han Zhang and Chu-Jun Zhao and Shuang-Chun Wen},
journal= {arXiv preprint arXiv:1402.6529},
year = {2015}
}
Comments
13 pages, 6 figures