MUMBAI, India, Jan. 9 -- Intellectual Property India has published a patent application (202541134695 A) filed by Indian Institute Of Technology, Chennai, Tamil Nadu, on Dec. 31, 2025, for 'fiber bragg grating technique for ultrasensitive optically trapped biomolecule detection and chemical sensing.'
Inventor(s) include Shivananju Bannur Nanjunda; Biplab Kumar Mahato; and Sweta Rath.
The application for the patent was published on Jan. 9, under issue no. 02/2026.
According to the abstract released by the Intellectual Property India: "The present disclosure discloses a fiber Bragg grating (FBG) technique for ultrasensitive optically trapped biomolecule detection and chemical sensing. The method comprises: (a) creating FBG in a single-mode photosensitive optical fiber using phase mask and a UV laser, (b) etching a cladding region of the optical fiber using 30%-40% hydrofluoric (HF) acid followed by 8% - 13% of HF acid, (c) monitoring Bragg wavelength shift during etching, (d) terminating the etching when diameter of a core part of the optical fiber is in a range of 100 - 400 nm, (e) depositing a charged layer onto the etched FBG region of the optical fiber, to obtain optical sensor, (f) immersing the optical sensor in a medium containing a biomolecule, the biomolecule being oppositely charged relatively to the charged layer, and (g) detecting the biomolecule by measuring a Bragg wavelength shift in a reflected spectrum of the optical sensor.
"
Disclaimer: Curated by HT Syndication.
