Different operation states of soliton pulses in an erbium-doped fibre ring laser
Zhang Shu-Min(张书敏)a) c) , Lü Fu-Yun(吕福云)b), Gong Yan-Dong(龚岩洞)c), and Yang Xiu-Feng(杨秀峰)c )
a Department of Physics, Hebei Normal University, Shijiazhuang 050016, China;; b Institute of Physics, Nankai University, Tianjin 300071, China; c Lightwave Department, Institute for Infocomm Research (I2R), Singapore
Abstract We report on the experimental observation of soliton pulses in an erbium doped fibre ring laser. The passive mode-locking is achieved using the nonlinear polarization rotation technique. By adjusting the pump power and the intracavity polarization controllers, a normal soliton, a stable 8th harmonic mode-locked pulse and a noise-like pulse have been observed in our laser. The experimental results revealed that the noise-like pulse is not suitable for the optical telecommunication, and in order to obtain the stable harmonic mode-locked soliton, a strong unstable CW laser field is necessary to mediate global soliton interaction. The formation mechanism of the harmonic mode-locked pulse has also been analysed.
Received: 07 February 2006
Revised: 20 August 2006
Accepted manuscript online:
Fund: Project
supported by the Hebei Natural Science Foundation, China (Grant Nos~
F2006000183 and 2001241) and
the Science Foundation of Hebei Normal University, China (Grant No L2005B05).
Cite this article:
Zhang Shu-Min(张书敏), Lü Fu-Yun(吕福云), Gong Yan-Dong(龚岩洞), and Yang Xiu-Feng(杨秀峰) Different operation states of soliton pulses in an erbium-doped fibre ring laser 2007 Chinese Physics 16 1986
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