Main > HPArticle > Ultra-long-period grating-based multi-wavelength ultrafast fiber laser [Invited]
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  • Manuscript Accepted: Jan. 5, 2021

    Online Published: Jan. 6, 2021

Chinese Optics Letters, 2021, Vol. 19, Issue 7, pp.

Ultra-long-period grating-based multi-wavelength ultrafast fiber laser [Invited] [Early Posting]

Guo Bo, Guo Xin-Yu, Tang Li-Ge, Yang Wen-Lei, Chen Qiu-Mei, Ren Zhong-Yao

Author Affiliations

  • Harbin Engineering University
  • Harbin Engineering University
  • Harbin Engineering University
  • Harbin Engineering University
  • Harbin Engineering University

Abstract

We propose and demonstrate the cascaded multi-wavelength mode-locked erbium-doped fiber laser (EDFL) based on ultra-long-period grating (ULPG) for the first time, to the best of our knowledge. Study found that, the ULPG can be used as both a mode-locker for pulse-shaping and a comb filter for multiwavelength generation simultaneously. Using the dual-function of ULPG, three-, four-, five-, six- and seven-wavelength mode-locked pulses are obtained in EDFL, seven of which are the largest number of wavelengths up to now. For the four-wavelength mode-locked pulses, its pulsewidth is about 7.8 ps. In experiment, the maximum average output power and slope efficiency of these pulses are 8.4 mW and 2.03%, respectively. Besides the conventional pulses, hybrid soliton pulses composed of four-wavelength pulse and single soliton are also observed. Finally, the effect of cavity dispersion on the multiwavelength mode-locked pulses is also discussed. Our findings indicate that apart from common sensing and filtering, the ULPG may also possess attractive nonlinear pulse-shaping property for ultrafast photonics application. © 2020 SIOM

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