Acousto-optic tunable ultrafast laser with vector-mode-coupling-induced polarization conversion

Yujia Li, Ligang Huang, Haonan Han, L. E.I. Gao, Yulong Cao, Yuan Gong, Wending Zhang, Feng Gao, Iroegbu Paul Ikechukwu, T. A.O. Zhu

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19 引用 (Scopus)

摘要

Acousto-optic interactions, employed in the ultrafast laser regulation, possess remarkable advantages for fast tuning performance in a wide spectral range. Here, we propose an ultrafast fiber laser whose wideband tunability is provided by an acousto-optic structure fabricated with an etched single-mode fiber. Because of the laser polarization conversion induced by the coupling between the core and cladding vector modes in the etched fiber, a band-pass characteristic of the acousto-optic interaction is achieved to effectively regulate the inner-cavity gain range. Cooperating with a saturable absorber based on single-wall carbon nanotubes (SWCNTs) with polarization robustness, a soliton operating state is achieved in the tunable erbium-doped fiber laser. By controlling the acoustical wave frequency from 1.039 to 1.069 MHz, this soliton laser can be conveniently tuned in a wide spectral range from 1571.52 to 1539.26 nm. Meanwhile, the laser pulses have near-transform-limited durations stably maintaining less than 2 ps at different wavelength channels, owing to the broadband nonlinear absorption of SWCNTs.

源语言英语
页(从-至)798-805
页数8
期刊Photonics Research
7
7
DOI
出版状态已出版 - 7月 2019

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