Title :
Optical fiber-based dispersion compensation using higher order modes near cutoff
Author :
Poole, Craig D. ; Wiesenfeld, Jay M. ; DiGiovanni, D.J. ; Vengsarkar, Ashish M.
Author_Institution :
Crawford Hill Lab., AT&T Bell Labs., Holmdel, NJ, USA
fDate :
10/1/1994 12:00:00 AM
Abstract :
Higher order spatial modes in optical fibers exhibit large, negative chromatic dispersion when operated near their cutoff wavelength. By using a spatial mode-converter to selectively excite a higher order mode in specially designed multimode fiber, this dispersion can be used to compensate the positive dispersion in conventional single-mode fiber spans. In this paper, issues related to compensating fiber and mode-converter design are explored. Experimental measurements in specially designed two-mode fibers operated in LP11 mode show negative dispersion as large as -70 ps/nm·km at 1555 nm. Pulse propagation and system experiments employing spatial mode-converters to excite LP11 mode in a two-mode fiber demonstrate the feasibility of this technique for dispersion compensation in lightwave systems
Keywords :
fibre lasers; laser modes; optical dispersion; optical fibres; optical links; 1555 nm; LP11 mode; conventional single-mode fiber spans; cutoff wavelength; dispersion compensation; higher order mode; higher order modes; higher order spatial modes; large negative chromatic dispersion; lightwave systems; mode-converter design; near cutoff; negative dispersion; optical fiber-based dispersion compensation; optical fibers; positive dispersion compensation; pulse propagation; selectively excite; spatial mode-converter; specially designed multimode fiber; two-mode fiber; two-mode fibers; Chromatic dispersion; Erbium-doped fiber amplifier; Laboratories; Optical fiber dispersion; Optical fiber polarization; Optical fiber theory; Optical fibers; Optical transmitters; Optical waveguides; Wavelength measurement;
Journal_Title :
Lightwave Technology, Journal of
