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Investigation of glow discharge of gas in hollow-core fibers

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Abstract

For the purpose of constructing novel waveguide gas lasers based on hollow-core fibers, we carried out a series of discharge experiments and succeeded in obtaining sustained glow discharge of gas in a 150-μm-inner-diameter (i.d.) hollow-core fiber with the length of 13.7 cm and in a 50-μm-i.d. hollow-core fiber with the length of 2.9 cm by using longitudinal direct current excitation. A flash glow is also observed in hollow-core photonic bandgap fiber with 20-μm i.d. and 2.6-cm length. Initial measurements of current–voltage (I–V) characteristics have been carried out for fibers of various hollow-core sizes filled with various gases at different pressures. Theoretical I–V characteristics are presented and compared with experimental results. Gas discharges in miniature-bore hollow-core fibers were found to exhibit unique characteristics that are different from the traditional larger-bore-diameter tubes. The glow-discharge spectrum of helium gas in a 150-μm-i.d. and 8-cm-length hollow-core fiber is also presented.

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Authors and Affiliations

  1. Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

    X. Shi, W. Jin & M.S. Demokan

  2. School of Optoelectronic Science and Engineering, The Huazhong University of Science and Technology, Wuhan, P.R. China

    X.B. Wang

Authors
  1. X. Shi
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  2. X.B. Wang
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  3. W. Jin
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  4. M.S. Demokan
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Correspondence to W. Jin.

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42.55.Wd; 42.55.Lt; 52.80.-s

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Shi, X., Wang, X., Jin, W. et al. Investigation of glow discharge of gas in hollow-core fibers. Appl. Phys. B 91, 377–380 (2008). https://doi.org/10.1007/s00340-008-3007-5

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  • DOI: https://doi.org/10.1007/s00340-008-3007-5

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