期刊
APPLIED OPTICS
卷 57, 期 13, 页码 3507-3510出版社
OPTICAL SOC AMER
DOI: 10.1364/AO.57.003507
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资金
- National Natural Science Foundation of China (NSFC) [11674133, 11711530208, 91750112]
- Funding of Jiangsu Innovation Program for Graduate Education [CXZZ13_0143]
- Key Research Program of Natural Science of Jiangsu Higher Education Institutions [17KJA416004]
Weak polarization dependence based on evanescent field interaction with a monolayer graphene absorber is demonstrated. By covering single-layer graphene on the top of a fiber taper, the symmetry of the light field propagation was destroyed. Polarization-dependent loss (PDL) of 2 dB was obtained, and no saturable absorption was observed. Passive mode locking was achieved by using the graphene-covered fiber taper in a fiber laser. It is found that the weak PDL down to 2 dB is capable for achieving mode locking in a fiber laser. Therefore, the claim of saturable absorption of any graphene or two-dimensional materials in a fiber laser needs to be made with care. (c) 2018 Optical Society of America.
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