Cladding-mode-assisted recouplings in concatenated long-period and fiber Bragg gratings.
We investigate new types of mode recouplings in a concatenated grating structure comprising a long-period grating and a fiber Bragg grating. It is demonstrated that the light coupled out to the cladding mode by one of these gratings can be recoupled back to the guided mode by the other grating. Theoretical analysis based on the coupled-mode theory is presented, together with experimental results.
Zhang
A-Ping
AP
Tao
Xiao-Ming
XM
Chung
Weng-Hong
WH
Guan
Bai-Ou
BO
Tam
Hwa-Yaw
HY