Optical Fiber Sensor with Dynamically Responsive Cladding for Real-Time Breath Pattern Monitoring.

ABSTRACT: Rapid and real-time monitoring of humidity changes is critical, as they impact human health, material storage, and stability, industrial fabrication, microbial transmission, and agriculture. In recent years, optical fiber-based sensors have emerged as promising candidates for monitoring exhaled and inhaled breath humidity to assess respiratory rate, with the goal of supporting clinical diagnosis and patient care. Conventional multimode plastic optical fibers utilize a high refractive index core and lower refractive index cladding for effective total internal reflection (TIR) to achieve waveguiding. In contrast, here, we fabricated an optical fiber-based sensor with a higher refractive index (1.52) biopolymer-based cladding onto a lower refractive index (1.49) poly-(methyl methacrylate) (PM

SUBMITTER: Srikrishnarka P 

PROVIDER: S-EPMC12489730 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature