Journal of Russian Laser Research

, Volume 37, Issue 3, pp 265–272 | Cite as

Passively Mode-Locked Figure-Eight Fiber Laser Using a Compact Power-Imbalanced Nonlinear Optical-Loop Mirror

  • Weibin Wang
  • Fei Wang
  • Yu Zhang
  • Huan Ma
  • Qiong Yu
  • Xin Zhang


We present an experimental demonstration of a passively mode-locked figure-eight fiber laser (F8L) based on a power-imbalanced nonlinear optical loop-mirror (PI-NOLM) comprising a section of 25 m long high-nonlinear fiber (HNLF) and a tunable attenuator (ATT). The asymmetric power, which results in different nonlinear phase shifts on the clockwise (CW) and counter-clockwise (CCW) directions, is achieved using an ATT. We greatly reduce the length of the nonlinear cavity, which can effectively diminish the interference from external environment. A balanced optical coupler (OC) and an ATT act as a tunable OC. So, a stable mode-locked pulse train with full width at half maximum (FWHM) of 571 fs and signal-to-noise ratio (SNR) of 60 dB is obtained.


laser property mode locking nonlinear optics 


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Weibin Wang
    • 1
  • Fei Wang
    • 1
    • 2
  • Yu Zhang
    • 3
  • Huan Ma
    • 1
  • Qiong Yu
    • 1
  • Xin Zhang
    • 1
  1. 1.School of Optoelectronic InformationChongqing University of TechnologyChongqingP. R. China
  2. 2.Chongqing Key Laboratory of Modern PhotoelectricDetection Technology and InstrumentChongqingP. R. China
  3. 3.Chongqing Optoelectronics Research InstituteChongqingP. R. China

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