Pagani M, Marpaung D, Eggleton B J
Opt Lett. 2014 Oct 15;39(20):5854-7. doi: 10.1364/OL.39.005854.
We introduce a new principle that enables separate control of the amplitude and phase of an optical carrier, simply by controlling the power of two stimulated Brillouin scattering (SBS) pumps. This technique is used to implement a microwave photonic phase shifter with record performance, which solves the bandwidth limitation of previous gain-transparent SBS-based phase shifters, while achieving unprecedented minimum power fluctuations, as a function of phase shift. We demonstrate 360° continuously tunable phase shift, with less than 0.25 dB output power fluctuations, over a frequency band from 1.5 to 31 GHz, limited only by the measurement equipment.
我们提出了一种新原理，通过控制两个受激布里渊散射（SBS）泵浦的功率，能够分别控制光载波的幅度和相位。该技术用于实现具有创纪录性能的微波光子移相器，它解决了先前基于增益透明SBS的移相器的带宽限制，同时实现了前所未有的最小功率波动（作为相移的函数）。我们展示了360°连续可调相移，在1.5至31 GHz的频带上，输出功率波动小于0.25 dB，仅受测量设备限制。
