期刊
NANOTECHNOLOGY
卷 31, 期 36, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/ab8fe6
关键词
1T-phase titanium diselenide (1T-TiSe2); saturable absorber (SA); mode-locked fiber laser; soliton pulses; bound-state pulses; erbium-doped fiber (EDF) laser
资金
- National Natural Science Funds, China [11704226, 11304184]
- Natural Science Foundation of Shandong Province [ZR2017MA051]
- Shandong University of Technology
- Zibo City Integration Development Project [2019ZBXC120, 2018ZBXC052]
Conventional solitons (CSs) as well as bound-state solitons in a passively mode-locked erbium-doped fiber (EDF) laser based on 1 T-phase titanium diselenide (1 T-TiSe2) saturable absorber (SA) have been systematically demonstrated for the first time. The mode locker is assembled by sandwiching the 1 T-TiSe(2)film between two fiber ferrules to improve compatibility with the all-fiber-integrated ring cavity configuration. The modulation depth, saturation intensity and nonsaturable loss of the prepared 1 T-TiSe(2)SA are 14.36%, 1.33 MW cm(-2)and 9.44%, respectively. The system is switchable between two states: CS and bound-state CS, by carefully adjusting the orientations of the polarization controller (PC). In the CS mode-locked regime, the oscillating wavelength is centered at 1558.294 nm with a pulse duration of 1.74 ps, a pulse repetition rate of 3.23 MHz and a maximum average output power of 2.904 mW. In the bound-state CS regime, two identical solitons form the bound-state pulses with a temporal separation of 6.1 ps, and the bound-state pulses are equally distributed at a repetition rate of 3.23 MHz, corresponding to the fundamental cavity repetition rate. The experimental results further indicate that 1 T-TiSe(2)SA is competitive with the existing SAs explored so far and will promote the applications of 1 T-TiSe2-based SAs in the field of ultrafast lasers.
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