MUMBAI, India, Nov. 21 -- Intellectual Property India has published a patent application (202431039103 A) filed by Indian Institute Of Technology Bhubaneswar; and Indian Institute Of Technology Patna, Bhubaneswar, Orissa, on May 18, 2024, for 'optical system and method for capturing acoustic emissions in harsh environment.'
Inventor(s) include Prof. Rajan Jha; Arvind Kumar Maurya; and Dr. Rishi Raj.
The application for the patent was published on Nov. 21, under issue no. 47/2025.
According to the abstract released by the Intellectual Property India: "The present invention relates to an all-silica fiber-based system for acoustic detection in hazardous environments. This system can detect frequencies ranging from few Hz to 17 kHz, and potentially higher frequencies (ultrasonic range). It exhibits a linear temperature response up to 100 deg C and can withstand temperatures up to 400 Deg C depending on the materials used. The proposed system also features customizable sensitivity and performance. Its cost-effectiveness makes it more practical, user-friendly, and competent than existing room temperature acoustic technologies. A notable feature of this system is its operation based on wavelength interrogation, enabling it to function in extreme pressure and depth conditions without any loss of generality or operational mechanism. Being entirely optical fiber-based, the system offers high accuracy in terms of losses, facilitating remote operation from tough and hazardous environments. The technique involves a metallic diaphragm that forms a chamber with the ends of an inexpensive optical fiber. The pattern repeats at intervals equal to the wavelength ratio, enhancing the sensitivity of this type of interferometer. This allows the sensor to detect changes smaller than the wavelength of light, making it useful for a variety of applications. The proposed system is adaptable, compact, and remotely accessible."
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