MUMBAI, India, Jan. 9 -- Intellectual Property India has published a patent application (202541134692 A) filed by Indian Institute Of Technology, Chennai, Tamil Nadu, on Dec. 31, 2025, for '2d material-metal heterostructure coated fiber bragg grating device for bragg wavelength tuning and modulation.'
Inventor(s) include Bannur Nanjunda, Shivananju; and Oinam, Ural.
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 invention discloses a fibre Bragg grating (FBG) device and a method for post-inscription wavelength tuning and electrical modulation. The device comprises an optical fibre having a Bragg grating, a graphene-based particulate seeding layer disposed on the fibre cladding in a grating region, and a conductive metal layer electroplated directly onto the seeding layer. The defect-rich graphene-based seeding layer provides nucleation sites that enable direct electroplating of a continuous, electrically conductive metal coating using scalable electrochemical processes. Controlled electroplating induces an engineered internal stress state in the metal layer, enabling deterministic post-inscription positioning of the Bragg wavelength. The electroplated metal layer further functions as an integrated, electrically addressable heating element, allowing electro-thermo-optic modulation of the Bragg wavelength during operation. The disclosed device and method provide integrated static and dynamic Bragg wavelength control within a compact, fibre-compatible architecture suitable for optical sensing, spectral filtering, optical communication, and photonic integrated system."
Disclaimer: Curated by HT Syndication.
