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Chinese Optics Letters, Vol. 17, Issue 9, 091402 (2019)

Towards all-fiber structure pulsed mid-infrared laser by gas-filled hollow-core fibers

Wei Huang1, Yulong Cui1, Zhiyue Zhou1, Zhixian Li1, Yubin Chen4, and Zefeng Wang1,2,3,*

Author Affiliations

  • 1College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
  • 2State Key Laboratory of Pulsed Power Laser Technology, Changsha 410073, China
  • 3Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha 410073, China
  • 4Luoyang Electronic Equipment Test Center of China, Key Laboratory of Electro-Optical Countermeasures Test & Evaluation Technology, Luoyang 471003, China

Abstract

We report here on a diode-pumped pulsed mid-infrared laser source based on gas-filled hollow-core fibers (HCFs) towards an all-fiber structure by the tapering method. The pump laser is coupled into an acetylene-filled HCF through a tapered single-mode fiber. By precisely tuning the wavelength of the diode to match different absorption lines of acetylene near 1.5 μm, mid-infrared emission around 3.1–3.2 μm is generated. With 2 m HCFs and 3 mbar acetylene gas, a maximum average power of 130 mW is obtained with a laser slope efficiency of ∼24%. This work provides a potential scheme for all-fiber mid-infrared fiber gas lasers.