Related Experiment Video
Updated: Oct 22, 2026
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
High-extinction-ratio polarizers using cascaded asymmetric directional couplers on silicon nitride for optical
YunRui Zhuang1,2, Jian Shen1,2, Shuai Lei1,3
1State Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China.
Abstract:
Polarizers are critical components of integrated optical gyroscope chips. However, it remains a significant challenge to achieve integrated polarizers with a high polarization extinction ratio (PER). We propose and demonstrate integrated transverse-electric fundamental-mode-pass polarizers with high PER for O-band and C-band interferometric fiber optic gyroscopes on a commercial silicon nitride photonics platform. Using cascaded asymmetric directional coupler structures, we achieve a PER exceeding 45 dB with an insertion loss below 0.8 dB over 1260-1325 nm, together with a PER exceeding 30 dB over 1500-1535 nm. This polarizer is promising for future integration into optical gyroscope chips through monolithic or heterogeneous photonic integration.
