Optical fibre loop resonators with double couplers

On the Configurations of Double Optical Fiber Loop or Ring Resonator with Double Couplers

“…(c) Types 8 and 13 [12,7] These two configurations are symmetric l W resonators. Type 8 has a duality in that it can be considered as either a double-coupler ring or adouble-coupler loop.…”

“…Very recently, some novel double-coupler fiber loop configurations, such as the symmetric double-coupler fiber loop (SDCFL) and the symmetric and unsymmetric s-shaped double-coupler fiber loops (SSDCFL and USDCFL) have been studied [7][8][9]. These fiber loops show some unique and interesting characteristic which can make them practical and useful devices in fiber communications and other areas.…”

“…The last decade has seen an increasing research interest in single-mode optical fiber loops, rings and mirrors (reflectors) with single and double couplers [1][2][3][4][5][6][7][8][9]. The main reason is that they have potential applications as sensors, and as filters, resonators, delay lines, interferometers and multi-frequency carriers, etc.…”

“…All mathematics and analytical expressions will be avoided, because including them will make the paper too lengthy. Moreover, most of these nineteen configurations have been analysed quantitatively elsewhere [4,[7][8][9][10][11][12][13][14][15].…”

A bow-tie shaped optical fiber loop and ring with double couplers

“…In a previous study, we reported our theoretical work on a symmetrical doublecoupler fiber loop (SDCFL) [3] and a symmetrical double-coupler fiber ring (SDCFR) [4], symmetrical and unsymmetrical s-shaped double coupler fiber loops (SSDCFL) and (USDCFL) , and a spectacles-shaped fiber ring with two couplers (SSTCFR) [7]. These five fiber loop or ring configurations make a complete set for the double-coupler fiber loop and ring that is a partly overlapped combination (basically, in series) between two fiber mirrors [S], loops, and rings.…”