Abstract
A frequency-domain interferometer for probing the variations of the dielectric constant of a plasma with sub-100-fs temporal resolution and λ/2000 phase resolution is described. Imaging the plasma on the entrance slit of a spectrograph provides spatial resolution along a diameter of the focal spot. The technique is used to map out the expansion of the critical density surface of a femtosecond laser-produced plasma with subnanometer spatial resolution along the laser axis.
| Original language | English |
|---|---|
| Pages (from-to) | 1997-1999 |
| Number of pages | 3 |
| Journal | Optics Letters |
| Volume | 19 |
| Issue number | 23 |
| DOIs | |
| Publication status | Published - 1 Dec 1994 |