Ultralow-power four-wave mixing with Rb in a hollow-core photonic band-gap fiber.
We demonstrate extremely efficient four-wave mixing with gains greater than 100 at microwatt pump powers and signal-to-idler conversion of 50% in Rb vapor confined to a hollow-core photonic band-gap fiber. We present a theoretical model that demonstrates such efficiency is consistent with the dimensions of the fiber and the optical depths attained. This is, to our knowledge, the largest four-wave mixing gain observed at such low total pump powers and the first demonstrated example of four-wave mixing in an alkali-metal vapor system with a large (approximately 30 MHz) ground state decoherence rate.
Londero
Pablo
P
Department of Applied and Engineering Physics, Cornell University, USA. pl336@cornell.edu
Venkataraman
Vivek
V
Bhagwat
Amar R
AR
Slepkov
Aaron D
AD
Gaeta
Alexander L
AL