Applied Physics B

, Volume 91, Issue 2, pp 377–380 | Cite as

Investigation of glow discharge of gas in hollow-core fibers



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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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  1. 1.Department of Electrical EngineeringThe Hong Kong Polytechnic UniversityKowloonHong Kong
  2. 2.School of Optoelectronic Science and EngineeringThe Huazhong University of Science and TechnologyWuhanP.R. China

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