Different operation states of soliton pulses in an erbium-doped fibre ring laser |
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Authors: | Zhang Shu-Min L Fu-Yun Gong Yan-Dong Yang Xiu-Feng Singapore |
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Institution: | Department of Physics, Hebei Normal University, Shijiazhuang 050016, China; Institute of Physics, Nankai University, Tianjin 300071, China; Lightwave Department, Institute for Infocomm Research (I2R), Singapore |
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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. |
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Keywords: | fibre laser soliton mode-locking |
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