Marpaung David, Chevalier Ludovic, Burla Maurizio, Roeloffzen Chris
Telecommunication Engineering group, University of Twente, Enschede, the Netherlands.
Opt Express. 2011 Dec 5;19(25):24838-48. doi: 10.1364/OE.19.024838.
We report and experimentally demonstrate the generation of impulse radio ultrawideband (UWB) pulses using a photonic chip frequency discriminator. The discriminator consists of three add-drop optical ring resonators (ORRs) which are fully programmable using thermo-optical tuning. This discriminator chip in combination with a phase modulator forms a temporal differentiator where phase modulation is converted to intensity modulation (PM-IM conversion). By means of tailoring the discriminator response using either the individual or the cascade of drop and through responses of the ORRs, first-order or second-order temporal differentiations are obtained. Using this principle, the generation of UWB monocycle, doublet and modified doublet pulses are demonstrated. The use of this CMOS-compatible discriminator is promising for the realization of a compact and low cost UWB transmitter.
我们报告并通过实验证明了使用光子芯片鉴频器生成脉冲无线电超宽带（UWB）脉冲。该鉴频器由三个可通过热光调谐完全编程的分插光学环形谐振器（ORR）组成。该鉴频器芯片与相位调制器相结合形成一个时间微分器，其中相位调制被转换为强度调制（PM-IM转换）。通过使用ORR的单个或级联的下降和直通响应来调整鉴频器响应，可以获得一阶或二阶时间微分。利用这一原理，演示了UWB单周期、双脉冲和改进双脉冲的生成。这种与CMOS兼容的鉴频器的使用对于实现紧凑且低成本的UWB发射器很有前景。
