Silicon three-mode (de)multiplexer based on cascaded asymmetric Y junctions.
A three-mode (de)multiplexer based on two cascaded asymmetric Y junctions is proposed and experimentally demonstrated on a silicon-on-insulator platform for mode-division multiplexing applications. Within a bandwidth from 1537 to 1566 nm, the best demultiplexing crosstalk of the fabricated device, composed of a three-mode multiplexer, a multimode straight waveguide, and a three-mode demultiplexer, is up to -31.5  dB, while in the worst case it is -9.7  dB. The measured maximum insertion loss is about 5.7 dB at a wavelength of 1550 nm. The mode crosstalk and insertion loss can be further improved by high-quality fabrication processes.
Weiwei
W
Chen
Pengjun
P
Wang
Tianjun
T
Yang
Gencheng
G
Wang
Tingge
T
Dai
Yawei
Y
Zhang
Liqiang
L
Zhou
Xiaoqing
X
Jiang
Jianyi
J
Yang