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High-Q Microring Resonators With 2 ,\times, 2 Angled Multimode Interference Couplers

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6 Author(s)
Li Jin ; State Key Lab. for Modern Opt. Instrum., Zhejiang Univ., Hangzhou, China ; Jianwei Wang ; Xin Fu ; Bo Yang
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High Q-factor microring resonators (MRRs) with 2×2 angled multimode interference (MMI) couplers are realized based on SU-8 polymer strip waveguides, which has an SU-8 polymer core, an SiO2 buffer, and an air cladding. The present MRR has a small radius (150 μm) because of the high-index contrast of the SU-8 optical waveguides. The coupling ratio of the angled MMI couplers is adjusted to achieve a high-loaded Q-factor MRR by modifying the bending angle. When this bending angle is chosen as 3.25°, the Q-factor of the fabricated MRR is about 25 000.

Published in:

Photonics Technology Letters, IEEE  (Volume:25 ,  Issue: 6 )

Date of Publication:

March15, 2013

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