INVENTOR • Tao Wei
We have developed a novel optical frequency domain reflectometry (ODFR)-based distriubted fiber-optic sensing (DFOS) technology with ultralow SWaP-C
interrogator (100 times less cost than commercial ones without compromising performance) for continuously sensing of shape/position, stress, strain and temperature of an object. The new fiber optic sensing device uses a series of ultraweak (<−50 dB), mm or cm pitch reflector cavities along an optical fiber cable to perform distributed interferometric measurements. A wide variety of lasers can be utilized to fabricate the ultra-weak reflectors, including, but not limited to deep UV and IR/NIR femtosecond/picosecond lasers.
High-cost of interrogater is one of the major pain point of current OFDR-based DFOS technology. To address this problem we provided a solution which is different from conventional Rayleigh Scattering based OFDR technology which requires very expensive broadband interrogator (cost ≥ $100K). Our sensing device requires only a narrow interrogation bandwidth (hundreds of gigahertz or less), and thus can engage low-cost light sources having narrow bandwidth (e.g., a semiconductor laser source, DFB, VCSEL,etc.) contributing to drastically lowering the interrogator cost (e.g., < $1K).
A distributed sensing platform with high spatial resolution applicable in downhole temperature measurements, monitoring flexible aerospace components. Shape sensing, as well as providing “nerving system” to robotics arm, smart vehicles, smart building, homes, etc.
FEATURES & BENEFITS
About 100 times cost savings than existing commercially available devices without compromising performance.