Open AccessMode add/drop multiplexers of LP_02 and LP_03 modes with two parallel combinative long-period fiber gratings
Author(s) -
Liang Fang,
Hongzhi Jia
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.011488
Subject(s) - optics , multiplexer , materials science , mode volume , long period fiber grating , drop (telecommunication) , cladding mode , graded index fiber , mode scrambler , fiber bragg grating , multiplexing , single mode optical fiber , equilibrium mode distribution , cladding (metalworking) , bandwidth (computing) , polarization maintaining optical fiber , fiber optic sensor , optical fiber , physics , computer science , telecommunications , composite material
Two parallel combinative long-period fiber gratings (LPFGs) can convert the fundamental core mode LP(01) in a single-mode fiber (SMF) into one desired higher order core mode LP(0m) in a few-mode fiber (FMF), in the process of which one specific cladding mode acts as a medium coupled from one fiber to another. Different LP(0m) modes can be obtained by controlling the grating period of LPFG in FMF to meet the phase matching condition. In this article we focus on the design and analyses of LP(02) and LP(03) mode add / drop multiplexers (MADMs). This device has some advantages of facile and good scalability, and particularly, of eliminating coupling interferences for the ahead multiplexed modes by the posterior MADMs or couplers. Furthermore, the conversion rate of mode power theoretically can approach as much as 98%and the 3dB bandwidth can reach 10nm or more.