TY - JOUR
T1 - Bandwidth Tunable Filter Based on Ideal Quasi-Critical Coupling State in WGM Cavity
AU - Li, Jiwei
AU - Hu, Yue
AU - Gan, Xufan
AU - Gao, Feng
AU - Zhang, Wending
AU - Huang, Ligang
AU - Bo, Fang
AU - Zhang, Guoquan
AU - Xu, Jingjun
N1 - Publisher Copyright:
© 1983-2012 IEEE.
PY - 2021/10/15
Y1 - 2021/10/15
N2 - A tunable bandwidth add-drop filter in ideal quasi-critical coupling (QCC) state was analyzed in theory in detail and demonstrated in experiment, with two vector modes HE$^{\rm X}_{11}$ and HE$^{\rm Y}_{11}$ coupled single whispering gallery mode (WGM) as its basic configuration. In the experiment, the bandwidth tuning range at the Drop port was from 54.0 MHz to 775.8 MHz with the conversion efficiency maintained above 95%, and bandwidth tuning range at the Through port was from 6.6 MHz to 720.6 MHz with the insertion loss fluctuation less than 5%. The demonstrated filter gains advantages of stable efficiency, narrow band, and broad bandwidth tuning range, which will be helpful for its application in microwave photonics, narrow linewidth lasers and nonlinear optics.
AB - A tunable bandwidth add-drop filter in ideal quasi-critical coupling (QCC) state was analyzed in theory in detail and demonstrated in experiment, with two vector modes HE$^{\rm X}_{11}$ and HE$^{\rm Y}_{11}$ coupled single whispering gallery mode (WGM) as its basic configuration. In the experiment, the bandwidth tuning range at the Drop port was from 54.0 MHz to 775.8 MHz with the conversion efficiency maintained above 95%, and bandwidth tuning range at the Through port was from 6.6 MHz to 720.6 MHz with the insertion loss fluctuation less than 5%. The demonstrated filter gains advantages of stable efficiency, narrow band, and broad bandwidth tuning range, which will be helpful for its application in microwave photonics, narrow linewidth lasers and nonlinear optics.
KW - add/drop filter
KW - Mode conversion
KW - tunable bandwidth filter
KW - Whispering gallery mode
UR - http://www.scopus.com/inward/record.url?scp=85117272752&partnerID=8YFLogxK
U2 - 10.1109/JLT.2021.3104397
DO - 10.1109/JLT.2021.3104397
M3 - 文章
AN - SCOPUS:85117272752
SN - 0733-8724
VL - 39
SP - 6547
EP - 6552
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 20
ER -