Numerical analysis of a temperature sensor based on the photonic band gap effect in a photonic crystal fiber

Ion-Doped Photonic Crystal Fiber Lasers

“…Hollow-core photonic crystal fibers can be divided into two types by light conduction mechanisms, namely hollow-core photonic bandgap, and hollow-core anti-resonant. The core of hollow-core photonic bandgap photonic crystal fibers is generally filled with air or other gases, whose light conduction mechanism is photonic bandgap effect, as opposed to the total internal reflection type fibers (Huang et al, 2017;Boufenar et al, 2018). In a photonic bandgap fiber, periodic structure can be formed by alternating arrangements of high and low refractive index materials, which influences the photonic bandgap.…”

Band GAP Frequency Response in Regular Phononic Crystals

“…The propagation of a mechanical wave can be represented by a system of equations (1) where: P [kg/m•s 2 ] is the pressure field and ν [m/s] is the vector field of phase velocity, ρ [kg/m 3 ] is the mass density, and c is phase velocity propagated in the material.…”

“…In many research centers, the properties of photonic [1][2][3][4][5][6] and phononic [7][8][9][10] structures are analyzed, in which respectively electromagnetic and mechanical waves are propagated. Both these fields show a large similarity despite the description of various types of phenomena.…”

The Influence of Heat Treatment on the Phononic Multilayer Sensor

“…For both types of waves, similar phenomena occur, such as the lack of propagation of waves of given frequencies in the analyzed structures (occurrence of a band gap). The properties of electromagnetic waves are examined for photonic structures [1][2][3][4][5][6], while mechanical waves are analyzed in phononic structures [7][8][9][10][11][12][13][14][15]. Depending on the application, one, two and three-dimensional phononic crystals are used and their properties depend on the geometrical structure and type of materials used in the composite [16].…”