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.
| Original language | English |
|---|---|
| Pages (from-to) | 377-380 |
| Number of pages | 4 |
| Journal | Applied Physics B: Lasers and Optics |
| Volume | 91 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 May 2008 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- General Physics and Astronomy