作者
Shaoxiang Chen, Yuhao Chen, Kun Liu, Raghuraman Sidharthan, Huizi Li, Chen Jian Chang, Qi Jie Wang, Dingyuan Tang, Seongwoo Yoo
发表日期
2020/6/8
期刊
Optics express
卷号
28
期号
12
页码范围
17570-17580
出版商
Optica Publishing Group
简介
We report an all-fiber high pulse energy ultrafast laser and amplifier operating at the short wavelength side of the thulium (Tm) emission band. An in-house W-type normal dispersion Tm-doped fiber (NDTDF) exhibits a bending-induced distributed short-pass filtering effect that efficiently suppresses the otherwise dominant long wavelength emission. By changing the bending diameter of the fiber, we demonstrated a tunable mode-locked Tm-doped fiber laser with a very wide tunable range of 152 nm spanning from 1740 nm to 1892 nm. Pulses at a central wavelength of 1755 nm were able to be amplified in an all-fiber configuration using the W-type NDTDF, without the use of any artificial short-pass filter or pulse stretcher. The all-fiber amplifier delivers 2.76 ps pulses with an energy of ∼32.7 nJ without pulse break-up, due to the normal dispersion nature of the gain fiber, which marks so far, the highest energy …
引用总数
2020202120222023202431113127
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