论文类型：期刊论文
论文编号：7803907
第一作者：Bolan Liu
通讯作者：司马朝坦
合写作者：Wei Yang,刘德明,余宇,James C. Gates,Michalis N. Zervas,Peter G.R. Smith
发表刊物：IEEE Photonics Journal
收录刊物：SCI、EI
学科门类：工学
一级学科：光学工程
文献类型：J
卷号：8
期号：4
页面范围：1-8
ISSN号：1943-0655
关键字：Ultrafast devices, gratings, waveguide devices, microwave photonics signal processing
DOI码：10.1109/JPHOT.2016.2590941
发表时间：2016-07-13
影响因子：2.833
摘要：We propose and experimentally demonstrate an integrated photonic Hilbert transformer (PHT) with substantial time bandwidth product (TBP). Due to the current substrate material and fabrication technique, PHT devices find it challenging to achieve ultrawide operative bandwidth while maintaining the minimum bandwidth level presented as the narrow central notch in frequency response. This implies that the TBP value is restricted. Here, we investigate the synthesized refractive index profile in compact Bragg grating design for theoretical simulation and the linearity-enhanced direct UV grating writing fabrication for experimental implementation. The fabricated device could process microwave photonic signals as Hilbert transformation between 50 GHz and 3 THz, with the TBP above 60, which is the largest experimental data to the best of our knowledge. This technique allows the PHT with improved spectral performance to be suitable for analog all-optical signal processing.
发布期刊链接：https://ieeexplore.ieee.org/document/7511720