TY - JOUR
T1 - Dual-mode coupled-resonator integrated optical filters
AU - Alonso-Ramos, Carlos C.
AU - Morichetti, Francesco F.
AU - Ortega-Moñux, Alejandro A.
AU - Molina-Fernández, Íñigo I.
AU - Strain, Michael John M.J.
AU - Melloni, Andrea A.
PY - 2014/5/1
Y1 - 2014/5/1
N2 - A photonic integrated architecture realizing the concept of coupled-resonator dual-mode optical filters is presented. The proposed structure consists of a chain of directly coupled microring resonators with a partial reflector embedded in the last resonator. The contradirectional coupling induced by the reflector makes the effective order of the filter double with respect to the number of coupled resonators. Since the counterpropagating modes share the same physical cavity, the resonant frequencies are intrinsically aligned, sensitivity of the filter to fabrication tolerances is reduced, and control of the structure is eased with respect to coupled resonator filters of the same order. Second-and fourth-order dual-mode filters made of microring resonators loaded with a Bragg grating are experimentally demonstrated on a silicon-on-insulator photonic platform.
AB - A photonic integrated architecture realizing the concept of coupled-resonator dual-mode optical filters is presented. The proposed structure consists of a chain of directly coupled microring resonators with a partial reflector embedded in the last resonator. The contradirectional coupling induced by the reflector makes the effective order of the filter double with respect to the number of coupled resonators. Since the counterpropagating modes share the same physical cavity, the resonant frequencies are intrinsically aligned, sensitivity of the filter to fabrication tolerances is reduced, and control of the structure is eased with respect to coupled resonator filters of the same order. Second-and fourth-order dual-mode filters made of microring resonators loaded with a Bragg grating are experimentally demonstrated on a silicon-on-insulator photonic platform.
KW - light propagation
KW - optical filters
KW - optical resonators
KW - coupled resonator filters
KW - integrated optics
UR - http://www.scopus.com/inward/record.url?scp=84899585443&partnerID=8YFLogxK
U2 - 10.1109/LPT.2014.2310778
DO - 10.1109/LPT.2014.2310778
M3 - Article
AN - SCOPUS:84899585443
SN - 1041-1135
VL - 26
SP - 929
EP - 932
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 9
ER -