Dispersion Induced RF Power Degradation In Optical True Time Delay Implemented by a Broadband Light Source and a Dispersion Element
Dispersion-induced radio-frequency (RF) power degradation in the optical true time delay (OTTD) module implemented by a broadband light source (BBLS) and a dispersion element is studied in this paper, both theoretically and experimentally. Theoretical results indicate that compared with that using a tunable laser source (TLS), OTTD using a BBLS suffers from extra power degradation, and that when the transfer function of the tunable optical filter (TOF) can be approximated to be rectangular, at additional frequencies besides the power-vanishing frequencies in the case of using TLS, the phenomenon of electrical power-vanishing can also be observed. Experiments using a TLS and a BBLS are performed for comparison, and TOFs of different bandwidth are used. The electrical transfer functions are measured and prove the conclusion of the theory. The electrical power-vanishing frequencies are provided and in good agreement with the theoretical values.
Dispersion power degradation broadband light source optical true time delay phased array antenna,dispersion element
Peng Fang Xiaoping Zheng Yabin Ye Yili Guo Hanyi Zhang
State Key Laboratory on Integrated Optoelectronics/Tsinghua National Laboratory for InformationScien Create-Net,Via alla Cascata 56D,38100 Povo,Trento - Italy State Key Laboratory on Integrated Optoelectronics/Tsinghua National Laboratory for Information Scie
国际会议
2008亚太光通信会议(Asia-Pacific Optical Communications 2008)
杭州
英文
2008-10-26（万方平台首次上网日期，不代表论文的发表时间）