Micro-structured fiber Bragg gratings. Part I: Spectral characteristics

Micro-structured fiber Bragg gratings. Part II: Towards advanced photonic devices

“…This means that the real profile taking into account the technology involved for the device fabrication is not considered here. A detailed discussion on the effect of the fabrication process in case of HF based approach is reported in [10].…”

“…A detailed theoretical and numerical analysis of the spectral characteristics of the MSFBG taking into account the fabrication process has been proposed [10]. Here, new configurations involving MSFBG are proposed as starting point to develop advanced devices for sensing and communications applications.…”

Spectral Response of FBG Written in Specialty Single-Mode Fibers

“…This spectral response is generated by the optical beating between the spectra of the unperturbed grating regions, modulated by the phase shift induced by the loading. The main difference, here, with previously reported works on phase-shifted FBG [11][12][13], is when the birefringence axes are rotated, which may happen if the loading is along a direction different to the fast or slow axis of the fiber, and then there is coupling between polarization modes as shown in Fig. 3(b).…”

Fiber Bragg Grating Sensors for Mainstream Industrial Processes

“…Generally tilted gratings are used in optical interrogators as spectrometers [23]. The first microstuctured FBG had the cladding diameter reduced around the FBG so that the evanescent wave could interact with the surrounding medium [24,25]. Nowadays, there are many different types of microstrustured fibers with an array of different cross sectional areas which can improve the way the evanescent wave interacts with the medium inside the holes.…”