Generation of dual-wavelength domain-wall rectangular-shape pulses in HNLF-based fiber ring laser
- 作者：Zhen-Bin Lin ; Ai-Ping Luo ; Shi-Ke Wang ; Hui-Yi Wang ; Wen-Jun Cao ; Zhi-Chao Luo ; zcluo@scnu.edu.cn ; Wen-Cheng Xu ; xuwch@scnu.edu.cn
- 关键词：Fiber lasers ; Rectangular-shape ; Dual-wavelength domain wall
- 刊名：Optics and Laser Technology
- 出版年：2012
- 期刊代码：48_00303992
- 类别：ph
- 出版时间：October, 2012
- 卷：44
- 期：7
- 页码：2260-2264
- 文件大小：911 K
摘要
The generation of dual-wavelength domain-wall rectangular-shape pulses in a highly nonlinear fiber (HNLF)-based fiber ring laser is experimentally demonstrated. The dual-wavelength lasing operation is realized by employing the intracavity birefringence-induced spectral filtering effect. An 85 m long HNLF is introduced into the fiber ring laser to enhance the nonlinear effect, which is favorable for the cross coupling between the two lasing beams. Experimentally, it was found that the interval of two domain walls in the time domain could be adjusted by simply tuning the linear cavity phase delay, which results in the achievement of different output pulse shapes. By properly rotating the polarization controller (PC), the dual-wavelength rectangular-shape pulses could be efficiently obtained. The proposed fiber laser provides a simple and efficient way to generate rectangular-shape pulse.