Figure 6

Reflection of a long weak narrow-line probe pulse in dependence on its wavelength from a grating containing 1000 periods (\(75\,\mu \hbox {m}\) each) in a medium with 1 bar pressure of the active molecules. The inset shows schematically a CW wave modulated by switching on and off the grating dynamically as a function of time. This figure was created in Phython 2.7, preinstalled with Ubuntu linux 18.04.05 (https://ubuntu.com/).