Development of two types of ultrafast mode-locking operations from an Er-doped fiber laser based on germanene nanosheets

by Higher Education Press

As passive modulators in passively locked fiber lasers, tunable absorbers play an important role in the generation of ultrashort pulses. Germanene, a graphene-like two-dimensional material with a fast carrier relaxation time and a large nonlinear absorption coefficient comparable to graphene, is a saturated absorbent with a very fast response.

Researchers led by Professor Wei Xia at Jinan University (UJN) are interested in modulation switches in fiber lasers, and two-dimensional material saturated absorbers have been a hot research topic in recent years.

Two-dimensional materials produce drawbacks such as traditional synthetic saturable absorbers such as nonlinear polarization rotation and nonlinear amplification loop glass with poor environmental stability and complex structure. Germanine, as a two-dimensional material, has excellent nonlinear optical properties, and fully exploring its potential performance has a positive contribution to the development of passive modulators.

Researchers predict its potential applications. Using it as a saturable absorber, pulses such as femtosecond pulses and high-energy noise can be obtained.

The work has been published in the Journal Frontiers of Optoelectronics.

More information:
Baohao Xu et al, Two types of ultrafast mode-locking operations from an Er-doped fiber laser based on germanene nanosheets, Frontiers of Optoelectronics (2023) DOI: 10.1007/s12200-023-00068-1

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