Dual-channel microfluidic sensor based on side-hole fiber with two long-period fiber gratings

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2020,（2）
• 页码范围: 1-4
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL202018.020601

摘要

We propose and demonstrate a dual-channel microfluidic sensor based on a side-hole fiber (SHF) with two long-period fiber grating (LPFG) structures.There are two air holes in the SHF,which are natural microfluidic channels.We fabricate two LPFGs (long-period gratings LPG-A and LPG-B) in the SHF with the resonance wave-lengths of 1268.7 nm and 1385.8 nm,respectively.Results show that the refractive index sensitivities of LPG-A and LPG-B are-76.0 nm/RIU and-71.1 nm/RIU,respectively.One can measure the refractive index of liquid samples in two channels simultaneously.The proposed dual-channel microfluidic sensor has advantages of good linearity response,fluidic technology compatibility,and easy light input/output coupling and system integration,which helps the sensor to have a potential application in environmental detection and food safety detection.