Abstract

Fiber optofluidic lasers (FOFLs) have attracted considerable research attention in the field of biochemical sensing due to their merits such as high sensitivity, low sample consumption, and real-time dynamic response. In this paper, we employ a Whispering Gallery Mode (WGM)-based FOFL to monitor the pH variation of rhodamine B (RB) aqueous micellar solution, in which small changes in pH are transformed into a dynamic response of the lasing spectral information in real-time, with a sensitivity of up to 7.3 nm/pH in the spectral shift for the pH in the range of 4.56–6.50. The sensor possesses a rapid response, high repeatability, good photostability, excellent reversibility, and immunity to the interference from the pump light, which can be used for in situ and real-time measurements in a wide range of biochemical applications. Additionally, the distinct dependence of lasing emission of RB molecules bound to surfactant micelles on the pH of an aqueous solution opens the possibility of using RB as an interfacial acid-base indicator.

Optical fiber optofluidic laser based on surfactant solubilization of rhodamine B gain in an aqueous solution

Dongyang Li, Li Zhou, Qiuhan Yu, Xiaoyun Pu, Yuze Sun, Qing Zhou, and Yuanxian Zhang
Opt. Express 30(13) 23295-23304 (2022)

Highly sensitive and selective detection of nitrite using a fiber optofluidic laser

Dongyang Li, Qingbo Xu, Fang Zhao, Chengde Guo, Jianwei Li, Xiaoyun Pu, Jing Xia, Yanfei Lü, and Yuanxian Zhang
Opt. Express 31(20) 31982-31992 (2023)

High sensitivity pH sensing by using a ring resonator laser integrated into a microfluidic chip

Dong-Yang Li, Han Zhang, Zhi Li, Ling-Wei Zhou, Meng-Da Zhang, Xiao-Yun Pu, Yu-Ze Sun, Hang Liu, and Yuan-Xian Zhang
Opt. Express 30(3) 4106-4116 (2022)

Real-time monitoring of the enzymatic reaction of urease by using whispering gallery mode lasing

Rui Duan, Yanzeng Li, Hanyang Li, and Jun Yang
Opt. Express 27(24) 35427-35436 (2019)

Monitoring phase changes in supercooled aqueous solutions using an optical fiber Fresnel reflection sensor

Priyadarshini Mani, Archana Rallapalli, Venkata Rajanikanth Machavaram, and Akella Sivaramakrishna
Opt. Express 24(5) 5395-5410 (2016)