Market Size by Fiber Type (Single Mode, Multimode), by Application (Temperature Sensing, Acoustic Sensing), by Scattering Process (Rayleigh, Raman, Brillouin), by Industry Vertical & Global Forecast. The global distributed fiber optic sensor market was valued at USD 1. 6. Distributed Optical Fiber Sensing (DFOS) transforms standard fiber optic cables into powerful sensors capable of detecting temperature, strain, and acoustic signals at thousands of measurement points over long distances. 99 billion by 2033, growing at a CAGR of 11. The growing adoption of real-time monitoring across critical infrastructure, rising integration of AI and.