In this paper Fibonacci series have been applied to
Fiber Bragg Grating (FBG) and phase shift section to design a
temperature and strain sensor in one fiber with dissociability
effect. The reflection spectrum of proposed structure has two
separate peaks. Variation of the measured temperature and
strain affects the amplitude and central wavelength of these
peaks. The amplitude and wavelength shift is measured
according to the reference, which is the reflected spectrum of the
sensor at room temperature and without applying external
strain. By interpolation the functions of amplitude and
wavelength shift of two peaks again the temperature and strain
applied to sensor, the effect of temperature and strain could be
separated. Transfer Matrix Method (TMM) has been used for
calculating the reflection spectrum of structure