Harmonic Mode-Locked Ytterbium-Doped Fibre Ring Laser
1 Department of Physics, College of Science, Taiyuan University of Technology, Shanxi 030024 2 State Key Laboratory of Transient Optics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068
Received Date:
October 18, 2006
Published Date:
March 31, 2007
Abstract
We demonstrate a harmonic mode-locked ytterbium-doped fibre ring laser, which consists of a polarization-sensitive isolator, two polarization controllers, two 976nm laser diodes as the pump source and a two-segment ytterbium-doped fibre. Utilizing an additive pulse mode-locked technique based on nonlinear polarization evolution, the ytterbium-doped fibre laser can operate in mode-locked state by adjusting the position of polarization controllers. The cavity fundamental repetition rate is 23.78MHz. We also observe the second- and third-harmonic mode locking in the normal dispersion region, and their repetition rates are 47.66MHz and 71.56MHz, respectively. Over-driving of the saturable absorber in the harmonic mode-locking pulse is analysed and discussed in detail.
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Cite this article:
YANG Ling-Zhen, WANG Yun-Cai, CHEN Guo-Fu, WANG Yi-Shan, ZHAOWei. Harmonic Mode-Locked Ytterbium-Doped Fibre Ring Laser[J]. Chin. Phys. Lett. , 2007, 24(4): 944-946.
YANG Ling-Zhen, WANG Yun-Cai, CHEN Guo-Fu, WANG Yi-Shan, ZHAOWei. Harmonic Mode-Locked Ytterbium-Doped Fibre Ring Laser[J]. Chin. Phys. Lett. , 2007, 24(4): 944-946.