Active narrowband filtering, line narrowing and gain using ladder electromagnetically induced transparency in an optically thick atomic vapour

James Keaveney, Armen Sargsyan, David Sarkisyan +2

Electromagnetically induced transparency (EIT) resonances using the $5{\mathrm{S}}_{1/2}\to 5{\mathrm{P}}_{3/2}\to 5{\mathrm{D}}_{5/2}$ ladder-system in optically thick Rb atomic vapou…