Title :
All-Fiber Mode-Locked Ring Laser With a Sagnac Filter
Author :
Zhou, Jie ; Yan, Ping ; Zhang, Haitao ; Wang, Dongsheng ; Gong, Mali
Author_Institution :
Dept. of Precision Instrum. & Mechanology, Tsinghua Univ., Beijing, China
Abstract :
We present an ytterbium-doped all-fiber all-normal-dispersion laser with a Sagnac filter. The Sagnac filter facilitates the all-fiber configuration without bulk filtering components. In addition, the bandwidth, central wavelength, and modulation depth can be tuned easily by controlling the length of the polarization-maintaining (PM) fiber and polarization controllers in the Sagnac loop. All these properties are independent of the polarization state of the pulses. Stable mode-locked pulses are obtained in this laser with a pulse energy of 3.5 nJ.
Keywords :
fibre lasers; laser mode locking; optical fibre dispersion; optical fibre polarisation; optical filters; ring lasers; ytterbium; Sagnac filter; Sagnac loop; all-fiber configuration; all-fiber mode-locked ring laser; energy 3.5 nJ; modulation depth; polarization controllers; polarization state; polarization-maintaining fiber; stable mode-locked pulses; ytterbium-doped all-fiber all-normal-dispersion laser; Fiber lasers; Filtering theory; Laser mode locking; Optical fiber amplifiers; Optical fiber filters; Optical fiber polarization; Sagnac interferometers; Mode-locked lasers; optical fiber lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2159833
