High-precision measurement of a propagation loss of low-loss single-mode optical waveguides on lithium niobate on insulator

Jintian Lin; Junxia Zhou; Renhong Gao; Min Wang; Rongbo Wu; Zhiwei Fang; Jianhao Zhang; Ya Cheng

doi:10.1117/12.2542143

2 March 2020 High-precision measurement of a propagation loss of low-loss single-mode optical waveguides on lithium niobate on insulator

Jintian Lin, Junxia Zhou, Renhong Gao, Min Wang, Rongbo Wu, Zhiwei Fang, Jianhao Zhang, Ya Cheng

Author Affiliations +

Proceedings Volume 11266, Laser Resonators, Microresonators, and Beam Control XXII; 1126607 (2020) https://doi.org/10.1117/12.2542143
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

Recently, low-loss (0.027 dB/cm) ridge waveguides have been demonstrated on lithium niobate on insulator (LNOI) by laser patterning followed by chemo-mechanical polishing. However, the fabricated waveguide supports multi-mode propagation due to the relatively large cross-sectional dimensions. Here, we report conversion of the multi-mode LNOI waveguides into single mode waveguides with a mode field size of ~2.5 μm with a cladding layer of Ta₂O₅. The propagation loss of the single mode waveguide is measured to be ~0.042 dB/cm. Most importantly, we show that this fabrication approach has allowed to fabricate meter-length long LNOI single mode waveguides of low propagation loss.

Conference Presentation

Citation Download Citation

Jintian Lin, Junxia Zhou, Renhong Gao, Min Wang, Rongbo Wu, Zhiwei Fang, Jianhao Zhang, and Ya Cheng "High-precision measurement of a propagation loss of low-loss single-mode optical waveguides on lithium niobate on insulator", Proc. SPIE 11266, Laser Resonators, Microresonators, and Beam Control XXII, 1126607 (2 March 2020); https://doi.org/10.1117/12.2542143

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