Full optical fiber current sensor phase modulation is the use of magnetic field made the refraction different of left-handed and right-handed circularly polarized light, and the linearly polarized light can be decomposed into a left-handed and right-handed circularly polarized light. The paper proposes research and design of reflective optical fiber current sensor based on improved phase modula...

Purus, Inc. has commercialized a fiber optic chemical Sensor using technology developed by Lawrence Livermore National Laboratory and licensed from The University of California. The basis for the sensor is the development of color within a reagent when exposed to an analyte. The sensor consists of an optrode, reagent delivery and recovery system, fiber optic transmitterreceiver, controller, and...

This paper presents high temperature measurements using a Brillouin scattering-based fiber optic sensor and the application of the measured temperatures and building code recommended material parameters into enhanced thermomechanical analysis of simply supported steel beams subjected to combined thermal and mechanical loading. The distributed temperature sensor captures detailed, nonuniform tem...

A curvature fiber optic sensor using a two-core fiber (TCF) is proposed and demonstrated. The TCF, which is designed to allow coupling between the cores, acts as a directional coupler and thus offers sinusoidal spectral response. The sensor is fabricated by splicing a 50 mm-long section of TCF between two SMFs. When the fiber is bent, the coupling coefficient between the cores is modified mainl...

Fiber-optic sensors are highly promising within soft robot sensing applications, but methods based on geometry-based reconstruction limit the capability and range. In this study, a fiber-optic sensor with different deployment strategy for indirect to monitor outside posture of manipulator is presented. The internal support structure’s curvature was measured using FBG sensor, its mapping externa...

A low cost fiber-optic micro-cavity interferometric sensor is presented. The micro-cavity is fabricated at the fiber tip by splicing a silica capillary to a single mode fiber and then heating/melting the capillary to form a microsphere with an internal air cavity. Applications of the micro-cavity sensor for temperature and traverse load measurements are demonstrated. The sensor has small size a...