中国物理B ›› 2014, Vol. 23 ›› Issue (6): 64204-064204.doi: 10.1088/1674-1056/23/6/064204

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Systematical analysis of mode-locked fiber lasers using single-walled carbon nanotube saturable absorbers

张晓, 宋晏蓉   

  1. Institute of Information Photonics Technology and College of Applied Sciences, Beijing University of Technology, Beijing 100124, China
  • 收稿日期:2013-09-04 修回日期:2013-11-07 出版日期:2014-06-15 发布日期:2014-06-15
  • 基金资助:
    Project supported by the National Key Basic Research Progrm of China (Grant No. 2013CB922404), the National Natural Science Foundation of China (Grant No. 61177047), and the Key Project of the National Natural Science Foundation of China (Grant No. 61235010).

Systematical analysis of mode-locked fiber lasers using single-walled carbon nanotube saturable absorbers

Zhang Xiao (张晓), Song Yan-Rong (宋晏蓉)   

  1. Institute of Information Photonics Technology and College of Applied Sciences, Beijing University of Technology, Beijing 100124, China
  • Received:2013-09-04 Revised:2013-11-07 Online:2014-06-15 Published:2014-06-15
  • Contact: Song Yan-Rong E-mail:yrsong@bjut.edu.cn
  • Supported by:
    Project supported by the National Key Basic Research Progrm of China (Grant No. 2013CB922404), the National Natural Science Foundation of China (Grant No. 61177047), and the Key Project of the National Natural Science Foundation of China (Grant No. 61235010).

摘要: The output characteristics of the Er-doped mode-locked fiber laser using a single-walled carbon nanotube saturable absorber are investigated theoretically with a nonlinear Schrödinger equation and a saturable absorption equation using realistic parameters. Stable self-starting mode-locking pulses are achieved under net normal, net zero, and net anomalous cavity group velocity dispersion (GVD) respectively. A spectrum with a flat top is obtained from the net normal cavity GVD laser while a spectrum with Kelly side-bands is obtained from the net anomalous cavity GVD laser. The characteristics of the pulse duration changing with cavity GVD and modulation depth of the single-walled carbon nanotubes are discussed. The characteristics of the mode-locking pulses from net normal, net zero, and net anomalous cavity GVD mode-locked fiber lasers are compared. These systematical results are useful for designing mode-locked fiber lasers with saturable absorbers made by different kinds of carbon nano-materials.

关键词: mode-locked fiber lasers, carbon nanotubes, theory

Abstract: The output characteristics of the Er-doped mode-locked fiber laser using a single-walled carbon nanotube saturable absorber are investigated theoretically with a nonlinear Schrödinger equation and a saturable absorption equation using realistic parameters. Stable self-starting mode-locking pulses are achieved under net normal, net zero, and net anomalous cavity group velocity dispersion (GVD) respectively. A spectrum with a flat top is obtained from the net normal cavity GVD laser while a spectrum with Kelly side-bands is obtained from the net anomalous cavity GVD laser. The characteristics of the pulse duration changing with cavity GVD and modulation depth of the single-walled carbon nanotubes are discussed. The characteristics of the mode-locking pulses from net normal, net zero, and net anomalous cavity GVD mode-locked fiber lasers are compared. These systematical results are useful for designing mode-locked fiber lasers with saturable absorbers made by different kinds of carbon nano-materials.

Key words: mode-locked fiber lasers, carbon nanotubes, theory

中图分类号:  (Modulation, tuning, and mode locking)

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