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Proceedings Paper

High-precision measurement of a propagation loss of low-loss single-mode optical waveguides on lithium niobate on insulator
Author(s): Jintian Lin; Junxia Zhou; Renhong Gao; Min Wang; Rongbo Wu; Zhiwei Fang; Jianhao Zhang; Ya Cheng
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Paper 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.

Paper Details

Date Published: 2 March 2020
PDF: 6 pages
Proc. SPIE 11266, Laser Resonators, Microresonators, and Beam Control XXII, 1126607 (2 March 2020); doi: 10.1117/12.2542143
Show Author Affiliations
Jintian Lin, Shanghai Institute of Optics and Fine Mechanics (China)
Junxia Zhou, East China Normal Univ. (China)
Renhong Gao, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Min Wang, East China Normal Univ. (China)
Rongbo Wu, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Zhiwei Fang, East China Normal Univ. (China)
Jianhao Zhang, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Ya Cheng, Shanghai Institute of Optics and Fine Mechanics (China)
East China Normal Univ. (China)
Univ. of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 11266:
Laser Resonators, Microresonators, and Beam Control XXII
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko; Andrea M. Armani, Editor(s)

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