Continuous-Wave Mid-Infrared Gas Fiber Lasers

Mengrong Xu, Fei Yu, Muhammad Rosdiabu Hassan, Jonathan C. Knight

Research output: Contribution to journalArticlepeer-review

17 Citations (SciVal)


Efficient continuous-wave laser emission of acetylene molecules at 3.1 μm wavelength has been demonstrated in low-loss hollow-core fiber by optically pumping using a fiber-amplified diode laser around 1.53 μm. In this paper, we report and compare the continuous-wave laser performance of acetylene molecules in the cavity and single-pass configurations. The use of low-loss antiresonant hollow-core fiber makes the single-pass configuration ideal for high-power laser generation and enables over 1.1 W continuous-wave mid-infrared laser output with over 33% slope efficiency relative to the absorbed pump power. The systematic characterization of power-scaling and pump power absorption properties demonstrates that the molecular kinetics inside hollow-core fiber determines the laser performance, and that low fiber attenuation is key to high-efficiency continuous-wave output.

Original languageEnglish
Article number8255800
JournalIEEE Journal of Selected Topics in Quantum Electronics
Issue number3
Publication statusPublished - 1 May 2018


  • gas lasers
  • optical fiber lasers
  • Optical fibers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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