Narrow-linewidth widely tunable hybrid Q-switched double-clad fiber laser.
A laser-diode-pumped Yb-doped double-clad fiber laser operating in a hybrid Q-switched regime has been demonstrated. With pulsed pump light and stimulated Brillouin scattering of the gain fiber as the Q-switching mechanisms, the laser generated nanosecond pulses with a stable repetition rate. A single-pulse energy of as much as 143.1 microJ with a peak power of 28.6 kW was obtained. Use of an external-cavity diffraction grating in the Littman configuration permitted tuning of the laser wavelength over a 15.7-THz range from 1080 to 1140 nm, and a linewidth of 0.04 nm over the whole tuning range was achieved.
Fan
Ya-Xian
YX
Institute of Physics, Nankai University, Tianjin 300071, China. fanyaxian@eyou.com
Lu
Fu-Yun
FY
Hu
Shu-Ling
SL
Lu
Ke-Cheng
KC
Wang
Hong-Jie
HJ
Zhang
Guang-Yin
GY
Dong
Xiao-Yi
XY