期刊
IEEE PHOTONICS JOURNAL
卷 11, 期 1, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2019.2892646
关键词
Graphene; saturable absorber; wavelength tunable operation; Q-switched fiber lasers
资金
- National Key Research and Development Program of China [2018YFB0504500]
- National Natural Science Foundation of China [61475171, 61705244, 61307056, 61875052]
- Natural Science Foundation of Shanghai [17ZR1433900, 17ZR1434200]
A tunable passively Q-switched fiber laser is fabricated using a graphene saturable absorber. The graphene saturable absorber is composed of a tapered fiber coated with graphene nanosheets. It combines the abilities of a saturable absorber and power-dependent tunable filter, thereby simplifying the structure of the tunable passively Q-switched fiber laser. The transmission peak of the graphene saturable absorber is linearly dependent on the input power and temperature, with slopes of approximately -0.35 nm/mW and -3.63 nm/degrees C, respectively. The 0-switched fiber laser exhibits a tunable wavelength range of 7 nm (from 1558 to 1565 nm). The output pulse offers the shortest pulse duration of 2.22 mu s with a repetition rate of 39.1 kHz and the widest pulse duration is 5.9 mu s that corresponds to a repetition rate of 21.3 kHz. The maximum pulse energy is 251.9 nJ, corresponding to an average output power of 8.6 mW.
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