Back to Search
Start Over
Spatio-temporal measurement of ionization-induced modal index changes in gas-filled PCF by prism-assisted side-coupling
- Source :
- Optics Express 27, 14392-14399 (2019)
- Publication Year :
- 2020
-
Abstract
- We report the use of prism-assisted side-coupling to investigate the spatio-temporal dynamics of photoionization in an Ar-filled hollow-core photonic crystal fiber. By launching four different LP core modes we are able to probe temporal and spatial changes in the modal refractive index on timescales from a few hundred picoseconds to several hundred microseconds after the ionization event. We experimentally analyze the underlying gas density waves and find good agreement with quantitative and qualitative hydrodynamic predictions. Moreover, we observe periodic modulations in the MHz-range lasting for a few microseconds, indicating nanometer-scale vibrations of the fiber structure, driven by gas density waves.<br />Comment: 8 pages, 4 figures, peer-reviewed and published
- Subjects :
- Physics - Optics
Physics - Plasma Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Optics Express 27, 14392-14399 (2019)
- Publication Type :
- Report
- Accession number :
- edsarx.2006.07257
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1364/OE.27.014392