Fiber Bragg grating sensors (FBGs) have gained rapid acceptance in aerospace and automotive structural health
monitoring applications for the measurement of strain, stress, vibration, acoustics, acceleration, pressure, temperature,
moisture, and corrosion distributed at multiple locations within the structure using a single fiber element. The most
prominent advantages of FBGs are: small size and light weight, multiple FBG transducers on a single fiber, and
immunity to radio frequency interference. A major disadvantage of FBG technology is that conventional state-of-the-art
fiber Bragg grating interrogation systems are typically bulky and heavy bench top instruments that are assembled from
off-the-shelf fiber optic and optical components integrated with a signal electronics board into an instrument console.
Based on the need for a compact FBG interrogation system, this paper describes recent progress towards the
development of a miniature fiber Bragg grating sensor interrogator (FBG-TransceiverTM) system based on multi-channel
integrated optic sensor (InOSense) microchip technology. The hybrid InOSense microchip technology enables the
integration of all of the functionalities, both passive and active, of conventional bench top FBG sensor interrogators
systems, packaged in a miniaturized, low power operation, 2-cm x 5-cm small form factor (SFF) package suitable for the
long-term structural health monitoring in applications where size, weight, and power are critical for operation. The
sponsor of this program is NAVAIR under a DOD SBIR contract.