Silica-microsphere-cavity-based microwave photonic notch filter with ultra-narrow bandwidth and high peak rejection

被引：21

作者：

Yu, Bei ^{[1
]}

Chen, Yongchao ^{[1
]}

Pan, Jingshun ^{[2
,3
]}

Zhang, Bin ^{[2
,3
]}

Li, Fan ^{[2
,3
]}

Wan, Lei ^{[5
]}

Guo, Xiaojie ^{[1
]}

Li, Jianping ^{[1
]}

Li, Zhaohui ^{[2
,3
,4
]}

机构：

[1] Jinan Univ, Inst Photon Technol, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou 510632, Guangdong, Peoples R China

[2] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China

[3] Sun Yat Sen Univ, Sch Elect & Informat Technol, Guangzhou 510275, Guangdong, Peoples R China

[4] Southern Lab Ocean Sci & Engn, Zhuhai 519000, Guangdong, Peoples R China

[5] Jinan Univ, Coll Informat Sci & Technol, Dept Elect Engn, Guangzhou 510632, Guangdong, Peoples R China

来源：

OPTICS LETTERS | 2019年 / 44卷 / 06期

基金：

中国国家自然科学基金;

关键词：

STIMULATED BRILLOUIN-SCATTERING; BAND;

D O I：

10.1364/OL.44.001411

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose and experimentally demonstrate a microwave photonic (MWP) notch filter based on a silica microsphere cavity. By using a high-Q-factor (similar to 1e7) cavity with a diameter of 132 um, the filter bandwidth can be easily decreased to 15 MHz in terms of simple fabrication and flexible coupling. Then we use the advanced modulation technique based on a dual parallel Mach-Zehnder modulator to further improve peak rejection (PR). The experimental results show that the MWP notch filter with its PR beyond 55 dB and frequency tunability range over 8 GHz has been achieved in combination with double-sideband modulation. To the best of our knowledge, this is a record for PR and bandwidth considered simultaneously for an MWP filter based on silica microcavities. Thus, the proposed MWP filter will be useful in the fields of microwave photonic signal processing, radar systems, etc. (C) 2019 Optical Society of America

引用

页码：1411 / 1414

页数：4

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