Wideband optical vector network analyzer based on polarization modulation

被引:5
作者
Su, Tao [1 ,2 ]
Wen, Jun [1 ,2 ]
Shi, Zhan [1 ,2 ]
Li, Ming [1 ,2 ]
Chen, Wei [1 ,2 ]
Zhu, Ninghua [1 ,2 ]
Li, Wei [1 ]
机构
[1] Chinese Acad Sci, Inst Semicond, State Key Lab Integrated Optoelect, Beijing 100083, Peoples R China
[2] Univ Chinese Acad Sci, Sch Elect Elect & Commun Engn, Beijing 100049, Peoples R China
基金
中国国家自然科学基金;
关键词
Optical vector network analyzer; Polarization modulation; Double-sideband modulation;
D O I
10.1016/j.optcom.2018.12.046
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We propose a polarization modulator (PolM) -based optical vector network analyzer (OVNA) with extended measurement bandwidth. The combined use of the PolM, a polarization controller (PC) and a polarizer performs phase-and-intensity hybrid modulation of optical signal with double-sideband (DSB) modulation. The ratio between phase and intensity modulations is controlled by the PC, leading to different modulation formats. The frequency response of a device-under-test (DUT) can be obtained by processing the results of two measurements under two arbitrarily different modulation formats. The significance of this work lies in that the measurement of a DUT with bandpass response can be simply achieved, which is a huge challenge for the conventional single-sideband (SSB)-based OVNAs. In addition, the measurement bandwidth is doubled compared with the conventional SSB-based OVNA. Moreover, the PolM-based OVNA can avoid the bias drifting problem using conventional Mach-Zehnder modulator (MZM)-based scheme. The proposed method is theoretically and experimentally demonstrated. A proof-of-concept experiment is carried out and a DUT with bandpass response is successfully measured using the proposed scheme.
引用
收藏
页码:67 / 70
页数:4
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