Title :
Switchable Dual-Wavelength and Passively Mode-Locked All-Normal-Dispersion Yb-Doped Fiber Lasers
Author :
Zhu, Xiaojun ; Wang, Chinhua ; Liu, Shixin ; Hu, Danfeng ; Wang, Jiajun ; Zhu, Canyan
Author_Institution :
Key Lab. of Adv. Opt. Manuf. of Jiangsu Province, Soochow Univ., Suzhou, China
fDate :
7/15/2011 12:00:00 AM
Abstract :
A switchable dual-wavelength and passively mode- locked ytterbium-doped fiber laser (YDFL) in the all-normal-dispersion (ANDi) regime is reported and demonstrated for the first time. Using a phase-shifted long-period fiber grating (PS-LPFG) as an all-fiber format spectral filter in the laser cavity, a stable and switchable dual-wavelength mode-locked operation is achieved by nonlinear polarization evolution (NPE). The maximum output energy of the dual-wavelength pulse is 25.76 nJ at a repetition rate of 2.499 MHz. It opens a new possibility to achieve switchable multiwavelength and mode-locked laser output in the ANDi cavity in an all-fiber format.
Keywords :
diffraction gratings; fibre lasers; laser cavity resonators; laser mode locking; optical fibre dispersion; optical fibre filters; optical fibre polarisation; optical filters; optical phase shifters; ytterbium; laser cavity; nonlinear polarization evolution; optical dispersion; passively mode-locked Yb-doped fiber lasers; phase-shifted long-period fiber grating; spectral filter; switchable dual-wavelength fiber lasers; Cavity resonators; Erbium-doped fiber lasers; Laser mode locking; Optical fiber dispersion; Optical fiber polarization; Switches; All-normal-dispersion (ANDi); fiber laser; mode-locked laser; switchable multiwavelength;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2146766
