Carbon Nanotube Mode-Locked Fiber Laser Generating Cylindrical Vector Beams with a Two-Mode Fiber Bragg Grating
- Resource Type
- article
- Authors
- Yu Cai; Jiaojiao Zhang; Changle Wang; Lin Zhang; Zuxing Zhang
- Source
- Applied Sciences, Vol 8, Iss 4, p 643 (2018)
- Subject
- cylindrical vector beam
two-mode fiber Bragg grating
mode-locked fiber laser
carbon nanotube
Technology
Engineering (General). Civil engineering (General)
TA1-2040
Biology (General)
QH301-705.5
Physics
QC1-999
Chemistry
QD1-999
- Language
- English
- ISSN
- 2076-3417
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.