Different operation states of soliton pulses in an erbium-doped fibre ring laser

• 来源期刊: 中国物理（英文版）
• 关键词: fibre laser soliton mode-locking
• 年，卷（期）: 2007,（7）
• 页码范围: 1986-1990
• 页数: 5页
• 语种: 英文

摘要

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.