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Carbon Nanotube Mode-Locked Fiber Laser Generating Cylindrical Vector Beams with a Two-Mode Fiber Bragg Grating

1
Advanced Photonic Technology Lab, College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
2
Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(4), 643; https://doi.org/10.3390/app8040643
Received: 21 March 2018 / Revised: 11 April 2018 / Accepted: 12 April 2018 / Published: 20 April 2018
(This article belongs to the Special Issue Erbium-doped Fiber Lasers)
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Abstract

We propose and demonstrate a compact all-fiber laser generating cylindrical vector beam (CVB) using carbon nanotubes as the saturable absorber for mode-locking and a two-mode fiber Bragg grating (TM-FBG) as the mode discriminator. Both radially and azimuthally polarized beams with a polarization purity of 90% were obtained by simply adjusting the polarization controllers. The CVB mode-locked fiber laser operates at 1552.9 nm with a 3-dB line width of less than 0.02 nm, generating ns CVB pulses. The all-fiber CVB laser may have potential applications from fundamental research to practical applications, such as particle capture, high-resolution measurement and material processing. View Full-Text
Keywords: cylindrical vector beam; two-mode fiber Bragg grating; mode-locked fiber laser; carbon nanotube cylindrical vector beam; two-mode fiber Bragg grating; mode-locked fiber laser; carbon nanotube
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Cai, Y.; Zhang, J.; Wang, C.; Zhang, L.; Zhang, Z. Carbon Nanotube Mode-Locked Fiber Laser Generating Cylindrical Vector Beams with a Two-Mode Fiber Bragg Grating. Appl. Sci. 2018, 8, 643.

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