Fabrication of lithium niobate-based low-loss bend optical waveguide

Xin Li; Ang Liu; Yu Qiu; Jie Feng; Jun-Jiang Chen; Xue-song Lin; Shi-han Yang; Zi-gang Zhou

doi:10.1117/12.2073602

18 November 2014 Fabrication of lithium niobate-based low-loss bend optical waveguide

Xin Li, Ang Liu, Yu Qiu, Jie Feng, Jun-Jiang Chen, Xue-song Lin, Shi-han Yang, Zi-gang Zhou

Proceedings Volume 9266, High-Power Lasers and Applications VII; 92661M (2014) https://doi.org/10.1117/12.2073602
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

Abstract

The bend waveguide is one of the key components of photonic integration. In this paper, by using tightly focused femtosecond laser pulses with repetition rate of 76 MHz, pulse duration of 50 fs, average output power about 270mW, and the focus lens NA=0.65, we put forward a structure of waveguide that bent it to be 1/4 round, and research its mechanism by performing experiments. Under the above conditions, when the vertical scanning speed of the laser system is 0.8 mm / s, the width of the bend optical waveguide is about 10μm, the loss reaches a minimum value about 1dB/cm when the bend way’s radius is about 5mm. Based on the experimental results of the above parameters, we can fabricate a 1/4 round vertical bend fiber coupler, which can be applied to the connection between the chips or inter-level optical .The results showed that the bend lithium niobate waveguides can be applied in the field of optical communication and has important implications for the production of low loss, low cost and small size optical waveguide gratings , vertical fiber coupler, optical switches and other devices .

Citation Download Citation

Xin Li, Ang Liu, Yu Qiu, Jie Feng, Jun-Jiang Chen, Xue-song Lin, Shi-han Yang, and Zi-gang Zhou "Fabrication of lithium niobate-based low-loss bend optical waveguide", Proc. SPIE 9266, High-Power Lasers and Applications VII, 92661M (18 November 2014); https://doi.org/10.1117/12.2073602

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KEYWORDS

Waveguides

Lithium niobate

Femtosecond phenomena

Crystals

Laser crystals

Lithium

Fiber couplers

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