title: Ultralow-power four-wave mixing with Rb in a hollow-core photonic band-gap fiber.
abstract: 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.
authors: Department of Applied and Engineering Physics, Cornell University, USA. pl336@cornell.edu
authors: Pablo
authors: P
authors: Londero
authors: Vivek
authors: V
authors: Venkataraman
authors: Amar R
authors: AR
authors: Bhagwat
authors: Aaron D
authors: AD
authors: Slepkov
authors: Alexander L
authors: AL
authors: Gaeta