Compact Microring Resonator With 2 x 2 Tapered Multimode Interference Couplers

• Compact microring resonator devices are realized by using a small SU-8 polymer strip waveguide that has an SU-8 polymer core (n similar to 1.573), an SiO2 buffer (n similar to 1.445), and an air cladding. Due to the high index contrast of the optical waveguide, a small bending radius (similar to 150 mu m) is used for the MRR. To enhance the coupling between the access optical waveguides and the microring, 2 x 2 multimode interference couplers are used. The measured spectral response of the through port shows a high extinction ratio of over 15 dB and a 3-dB bandwidth of about 0.38 nm (corresponding to a moderate Q-value of similar to 4500).

Nyckelord

Microring

multimode interference (MMI)

SU-8

optical wave-guides

polymer

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)