In normal fiber, the refractive indices of the core and cladding do not change along the length of the fiber;
however, by inducing a periodic modulation of refractive index along the length in the core of the optical
fiber, the optical fiber grating is produced. This exhibits very interesting spectral properties and for this
reason we propose to develop and integrate a distributed sensor network based on long period fiber gratings
(LPFGs) technology which has grating periods on the order of 100 μm to 1 mm to be embedded in the wing
section of aircraft to measure bending and torsion in real-time in order to measure wing deformation of
commercial airplanes resulting in extensive benefits such as reduced structural weight, mitigation of induced
drag and lower fuel consumption which is fifty percent of total cost of operation for airline industry.
Fiber optic sensors measurement capabilities are as vital as they are for other sensing technologies, but
optical measurements differ in important ways. In this paper we focus on the testing and aviation
requirements for LPFG sensors. We discuss the bases of aviation standards for fiber optic sensor
measurements, and the quantities that are measured.
Our main objective is to optimize the design for material, mechanical, optical and environmental
requirements. We discuss the analysis and evaluation of extensive testing of LPFG sensor systems such as
attenuation, environmental, humidity, fluid immersion, temperature cycling, aging, smoke, flammability,
impact resistance, flexure endurance, tensile, vitiation and shock.