Title :
Dispersion compensation based on dual-mode optical fiber with inhomogeneous profile core
Author :
Eguchi, Masashi ; Koshiba, Masanori ; Tsuji, Yukihide
Author_Institution :
Educ. Center for Inf. Process., Muroran Inst. of Technol., Hokkaido, Japan
fDate :
10/1/1996 12:00:00 AM
Abstract :
It is well known that the first higher order mode of optical fibers exhibits large negative waveguide dispersion by operating close to its cutoff wavelength. By using this dispersion, the positive dispersion in conventional 1.3 μm zero dispersion optical fibers for 1.55 μm signal light can be compensated. In this paper, we focus on the dispersion compensation technique using the first higher order mode in a dual-mode optical fiber, which supports both the fundamental LP01 and first higher order LP11 modes. Numerical calculations show that the waveguide dispersion of the first higher order mode is very sensitive to the refractive-index profile of optical fibers. In addition, it is demonstrated that a directional coupler composed of a single-mode fiber and a dual-mode fiber operates as a mode converter, which converts the signal light from the LP01 mode to the LP11 mode
Keywords :
compensation; optical directional couplers; optical fibre communication; optical fibre couplers; optical fibre dispersion; optical fibre theory; refractive index; sensitivity; μm signal light; μm zero dispersion optical fibers; 1.3 mum; 1.55 mum; cutoff wavelength; directional coupler; dispersion compensation; dual-mode optical fiber; first higher order LP11 modes; first higher order mode; fundamental LP01 modes; inhomogeneous profile core; large negative waveguide dispersion; mode converter; positive dispersion; refractive-index profile; signal light; waveguide dispersion; Fiber nonlinear optics; Optical coupling; Optical fiber communication; Optical fiber couplers; Optical fiber devices; Optical fiber dispersion; Optical fibers; Optical refraction; Optical sensors; Optical waveguides;
Journal_Title :
Lightwave Technology, Journal of
