期刊
NANOTECHNOLOGY
卷 31, 期 24, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/ab7a2f
关键词
HfSe2 nanosheets; saturable absorber; ultrafast pulse
资金
- National Natural Science Foundation of China [61775146, 61905148]
- Natural Science Foundation of Guangdong Province [2016A030310049]
- 2018 Jiangsu Overseas Visiting Scholar Program for University Prominent Young & Middle-aged Teachers and Presidents
We demonstrate the HfSe2 saturable absorber (SA) for the generation of ultrafast pulse laser. The HfSe2 SA device is fabricated by integrating HfSe2 nanosheets (NSs) with a microfiber. The material and optical characteristics of HfSe2 NSs show their high quality. The nonlinear optical absorption of HfSe2 SA is measured with a modulation depth of 5.8%. Stable soliton mode-locked laser based on HfSe2 SA is realized at the central wavelength of 1561.43 nm with pulse duration of 297 fs and the maximum pulse energy of 2.68 nJ. Our soliton fiber laser has a maximum output power of 48.5 mW with a high slope efficiency of 12.8%, which indicate that HfSe2 is a good candidate of SA for high efficient ultrashort pulses generation.
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