Title :
Passive Q-Switching of an All-Fiber Laser Using WS 2-Deposited Optical Fiber Taper
Author :
Khazaeinezhad, Reza ; Nazari, Tavakol ; Hwanseong Jeong ; Kyung Jun Park ; Byoung Yoon Kim ; Dong-Il Yeom ; Kyunghwan Oh
Author_Institution :
Photonic Device Phys. Lab., Yonsei Univ., Seoul, South Korea
Abstract :
We demonstrate the passive Q-switching operation of an erbium-doped fiber laser using a few-layer WS2-based saturable absorber with evanescent field interaction. WS2 flakes have been synthesized via a liquid-phase exfoliation method, and an optical fiber taper was selected as a light-material template that causes to achieve a long interaction length of the evanescent wave. Subsequently, the prepared solution was optically deposited around the 3-mm interaction length of the fabricated optical fiber taper with a 5-μm waist diameter. The proposed Q-switched fiber laser based on the WS2-deposited fiber taper saturable absorber could generate stable output pulses at 1565 nm, with a pulsewidth ranging from 1.3 to 3 μs and a repetition rate of 33-108 kHz.
Keywords :
Q-switching; erbium; fibre lasers; optical saturable absorption; tungsten compounds; WS2; all-fiber laser; evanescent field interaction; few-layer WS2-based saturable absorber; flakes; frequency 33 kHz to 108 kHz; light-material template; liquid-phase exfoliation method; optical fiber taper; passive Q-switching; size 5 mum; time 1.3 mus to 3 mus; wavelength 1565 nm; Optical device fabrication; Optical fiber couplers; Optical fiber dispersion; Optical fiber polarization; Optical surface waves; Q-switched fiber laser; Tungsten Disulfide; Tungsten disulfide; nonlinear optical materials; saturable absorber;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2015.2481611
