Characteristics of gas breakdown in hollow-core fibers

X. Shi, X. B. Wang, Wei Jin, M. S. Demokan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)


We succeeded in obtaining gas discharge in 250-, 150-, and 50-μm inner-diameter (i.d.) hollow-core fibers (HCFs) by using longitudinal direct current excitation. Stable glow discharges of at least several minutes were observed for these HCFs. A flash glow was also observed for an HCF with an i.d. of -20 μm. Breakdown of helium and argon gases in a 26.2-cm-long 250-μm-i.d. HCF was achieved with a voltage of less than 30 kV. Breakdown voltages of helium and argon gases were measured for various bore sizes, fiber lengths, and a pressure range from below 1 to 50 Torr. Experimental results deviated from previous theoretical models and further theoretical and experimental investigations are needed to understand the unique characteristics of gas-discharge in HCFs with i.d. below 250 μm.
Original languageEnglish
Pages (from-to)650-652
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number8
Publication statusPublished - 15 Apr 2008


  • Fiber laser
  • Gas breakdown
  • Gas laser
  • Glow discharge
  • Hollow-core fiber (HCF)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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