School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.
Opt Lett. 2010 Jul 1;35(13):2287-9. doi: 10.1364/OL.35.002287.
We demonstrate efficient all-optical modulation using Rb vapor confined to a hollow-core photonic bandgap fiber. The intensity of a signal field participating in the four-wave-mixing process is modulated using a weak switching field. We observe 3 dB of attenuation in the signal field with only 3600 photons of switching energy, corresponding to 23 photons per atomic cross section lambda(2)/(2pi). Modulation bandwidths as high as 300 MHz are observed.
我们使用限制在空芯光子带隙光纤中的铷蒸汽演示了高效的全光调制。通过弱开关场对参与四波混频过程的信号场的强度进行调制。我们仅用 3600 个开关光子能量观察到信号场 3 dB 的衰减，这对应于每个原子横截面 λ(2)/(2pi) 的 23 个光子。观察到高达 300 MHz 的调制带宽。
