Rongqing Xu

Aug 23, 2024 | opg.optica.org | Rongqing Xu |Tao Chen |JING CHEN |Linfeng Li

A method is proposed to calculate the liquid–solid contact angle by photographing the liquid surface height inside a transparent capillary tube, which simplifies the steps of measuring the contact angle by eliminating the need to search for the three-phase contact points and omitting the process of fitting the function to the liquid surface contour.

Apr 16, 2024 | opg.optica.org | Rongqing Xu |Tao Chen |Zhen Zhao |Zhengxuan Yang

Herein we report an electronically controlled tunable fiber-optic attenuator that leverages the microfluidic electro-wetting effect, which enables a fine-tuning of the solid-liquid interface wetting angle to control the micro-reflector, thus regulating the lens fiber coupling efficiency. Theoretical calculations indicated an optical attenuation regulation effect of 0–45.0 dB in the voltage range of 0–30.0 V.