Rajib Ahmed

Title: Rajib Ahmed and Polysaccharide Hydrogel Optical Fibers

Introduction

Rajib Ahmed is an inventor based in Mountain View, California, whose patent work includes optical fibers designed for sensing and biological applications. His listed affiliation is Leland Stanford Junior University.

Latest Patents

Ahmed is associated with one patent, 1 patent: “Polysaccharide Hydrogel Optical Fibers and Their Fabrication and Use.” The invention describes wet-spun, multilayer hydrogel optical fibers with ionic-crosslinked polysaccharide cladding. The fibers can use step- or gradient-index architectures, support fusion splicing, and be doped with rare-earth ions.

The patent also describes incorporating plasmonic nanoparticles, light-sensitive quantum dots, or other particles into the fiber core. These materials can produce a resonance light shift when molecular biotargets bind, enabling biosensor applications. One proposed use combines plasmonic hydrogel fibers with medical swabs for rapid pathogen detection, including detection of SARS-CoV-2. The invention further describes using living cells in the fibers to monitor biological responses, such as cancer-cell invasion and sensitivity to anticancer drugs.

Career Highlights

The patent highlights Ahmed’s contribution to research at the intersection of hydrogel materials, optical-fiber engineering, and biosensing. Its described applications range from pathogen detection to the measurement of complex cellular responses.

Collaborations

Ahmed’s listed coworkers include Utkan Demirci and Rui L. Reis. The patent’s multidisciplinary subject matter connects materials science and optical engineering with biomedical sensing and research.

Conclusion

Rajib Ahmed’s patented work explores how polysaccharide hydrogel optical fibers can support biosensing, pathogen detection, and the study of cellular behavior.