Advances in high-resolution, high sensitivity, and large dynamic range load and AE sensing technology has immediate applications in civil engineering for monitoring cracks, corrosion, and fatigue in steel and concrete structures such as bridges, freeways, and buildings. High frequency ultrasonic signal detection method development can be utilized in ultrasonic testing, medical ultrasonic imaging, and other non-destructive testing (NDT) technology. LGR's FO technology development can be readily incorporated into current fiber optics and optical cross-connect technology for next-generation telecommunication applications. Optical fiber technology provides significant advantages for advanced aerospace platforms because they are lightweight, immune to electromagnetic wave interference, and do not produce short circuits or ground loops. Therefore the development of fiber optic sensors has the potential to increase reliability, enable lower cost, and facilitate more effective health monitoring and nondestructive evaluation of NASA's advanced aircraft and spacecraft components and systems. The FO sensor device LGR has demonstrated and proposed to further develop for Phase II will greatly enhance NASA efforts to develop state-of-the-art, compact, low-cost, waveform-based, quantitative strain and ultrasonic wave sensing technology for load, temperature, corrosion, and crack monitoring of advanced structures.