Cheng Rui, Chrostowski Lukas
Opt Lett. 2018 Mar 1;43(5):1031-1034. doi: 10.1364/OL.43.001031.
Multichannel photonic Hilbert transformers (MPHTs) are reported. The devices are based on single compact spiral integrated Bragg gratings on silicon with coupling coefficients precisely modulated by the phase of each grating period. MPHTs with up to nine wavelength channels and a single-channel bandwidth of up to ∼625 GHz are achieved. The potential of the devices for multichannel single-sideband signal generation is suggested. The work offers a new possibility of utilizing wavelength as an extra degree of freedom in designing radio-frequency photonic signal processors. Such multichannel processors are expected to possess improved capacities and a potential to greatly benefit current widespread wavelength division multiplexed systems.
报道了多通道光子希尔伯特变换器（MPHTs）。这些器件基于硅上的单个紧凑型螺旋集成布拉格光栅，其耦合系数由每个光栅周期的相位精确调制。实现了具有多达九个波长通道且单通道带宽高达约625 GHz的MPHTs。提出了这些器件用于多通道单边带信号产生的潜力。这项工作为在设计射频光子信号处理器时将波长作为额外的自由度提供了新的可能性。这种多通道处理器有望具有更高的容量，并有可能使当前广泛使用的波分复用系统受益匪浅。
