Comb multi-wavelength, rectangular pulse, passively mode-locked fiber laser enhanced by un-pumped Erbium-doped fiber

OPTICS COMMUNICATIONS

卷:406

Article

Guo, Chunyu¹  Luo, Ruoheng¹  Liu, Weiqi¹  Ruan, Shuangchen¹  Yang, Jinhui¹  Yan, Peiguang¹  Wang, Jinzhang¹  Hua, Ping² 

[1] Shenzhen Univ, Coll Elect Sci & Technol, Coll Optoelect Engn,Guangdong Higher Educ Inst, Shenzhen Key Lab Laser Engn,Key Lab Adv Opt Preci, Shenzhen 518060, Peoples R China

[2] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

关键词: Multi-wavelength fiber laser;    Erbium-doped fiber laser;    Rectangular pulse;   

DOI  :  10.1016/j.optcom.2017.07.080

来源: Elsevier

【 摘 要 】

We propose and demonstrate a comb multi-wavelength, nanosecond rectangular pulse, passively mode-locked Erbium-doped fiber (EDF) laser. A section of un-pumped EDF had been employed to optimize the multiwavelength pulses for the first time to the best of our knowledge. The un-pumped EDF absorbs the unwanted the short-wavelength lasing and optimizes the gain, therefore allowing for the enhancement of the long-wavelength lasing. Because of the gain competition effect in the un-pumped EDF, the output wavelength line number of the fiber laser can be significantly increased from three wavelengths to twenty lasing wavelengths. The modelocked pulse has a rectangular temporal profile with pump power dependent pulse duration. Experimental results illustrate that the fiber laser has a good stability at room temperature. This work provides a new configuration for the design of multi-wavelength, rectangular nanosecond pulse that may fit for specific applications. (C) 2017 Published by Elsevier B.V.

【 授权许可】

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