Fiber Bragg gratings in hole-assisted multicore fiber for space division multiplexing

Abstract

In this Letter we present, for the first time to our knowledge, the results of fiber Bragg grating (FBG) inscription in a novel microstructured multicore fiber characterized by seven single-mode isolated cores. A clear Bragg reflection peak can be observed in all of the 7 cores after one inscription process with a KrF nanosecond laser in a Talbot interferometer set up. We furthermore perform a numerical analysis of the effective refractive indices of the particular modes and compare it with the FBG inscription results. An experimental analysis of the strain and temperature sensitivities of all of the Bragg peaks is also included.

Optimisation of fibre Bragg gratings inscription in multicore fibres

“…Today a diversity of MCF fibres from different manufacturers is available on the market. I order to avoid cross-talk between cores different methods can be used to increase the signal to noise ratio [4]. Such multicore fibres have also become attractive for multiplexed fibre sensor systems.…”

Review of Optical Fiber Sensor Network Technology Based on White Light Interferometry

“…The multiplexing technology uses the same interrogation system to query the measurement information of multiple sensors, which not only greatly simplifies the complexity of the system, but also ensures the measurement accuracy and reliability of the system [4]. The multiplexing technologies that have been developed are mainly time division multiplexing (TDM), frequency division multiplexing (FDM), wavelength division multiplexing (WDM), code division multiplexing (CDM), and space division multiplexing (SDM) [5][6][7][8].…”

Brillouin scattering effect in the multicore optical fiber applied to fiber optic shape sensing

“…Additionally, multicore fibers are suitable for inscription of fiber Bragg gratings (FBG) 9 , which can be useful for shape sensing 10,11 . Recently, observations of Brillouin scattering effect in multicore fibers were reported 12 and the effect was successfully applied for shape sensing 1 .…”