Abstract
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 language | English |
|---|---|
| Pages (from-to) | 650-652 |
| Number of pages | 3 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 20 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 15 Apr 2008 |
Keywords
- 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