[21p-A406-1~9] 3.13 Optical control devices and optical fibers (formerly 3.14)

▲ [21p-A406-3] Analysis of a Quasi-periodic Bragg fiber having nonlinear material in Fibonacci Sequence

〇(D)Chandan Singh Yadav¹, Vivek Singh¹ (1.Dept. of Phys., Banaras Hindu Univ., Varanasi, UP, INDIA)

Keywords:Quasi Periodic Bragg fiber, Photonic Band Gap, Nonlinear Material

A quasi-periodic inline Bragg fiber waveguide is analyzed and studied. The proposed waveguide consists of a hollow or low refractive index core surrounded by the layers of polydiacetylene 9-BCMU as non-linear material and TiO2 as linear material in the form of Fibonacci sequence. The reflectance equation of the structure is obtained using transfer matrix method and by matching the fields at each boundary. The reflectance of proposed structure shows a photonic band gap of range 737-939nm either side of central wavelength 838nm at scaling x=1.0. This photonic band gap is blue and red sifted with change in scaling x=0.9 and x=1.1, respectively. Due to the presence of nonlinear material this photonic bandgap can also be tuned with intensity of light. Here a linear variation in photonic band gap is observed with an increase in intensity. So, the proposed stricture may have promising applications in the field of optical fiber sensors, inline all-optical diodes, and all-optical processing.