Title :
In-fiber grating systems for pulse compression and complete dispersion compensation
Author :
Williams, J.A.R. ; Sugden, K. ; Zhang, L. ; Bennion, I. ; Doran, N.J.
Author_Institution :
Aston Univ., Birmingham, UK
Abstract :
An important application of in-fibre gratings is for dispersion compensation. Linearly chirped Bragg gratings used in reflection have a constant dispersion over bandwidths sufficient to support ultra-short pulses and so have particular potential in this area. Such gratings have been demonstrated in a variety of linear dispersion compensation applications. In this paper the authors look at using chirped gratings in two different applications which go beyond this simple linear dispersion, linear optical regime. In the first of these they use fibre nonlinearity and the linear dispersion of a linearly chirped grating to compress a pulse spectrally broadened by self-phase modulation. Both experimental and theoretical investigations have been carried out on this scheme. Such compression may find application for compressing solitons to reduce the fiber lengths required in photonic switching applications. The second application is to use quadratically chirped gratings to perform higher order dispersion compensation in the fiber. A simple group delay model for chirped in-fiber gratings has been used to derive design parameters for such a system; and the results compared with numerical simulations. Higher order dispersion compensation may find application in dispersion managed high bit rate communication systems or in ultrashort pulse modelocked fiber laser sources
Keywords :
chirp modulation; diffraction gratings; high-speed optical techniques; optical fibre communication; optical fibre dispersion; optical pulse compression; optical solitons; photonic switching systems; chirped gratings; design parameters; dispersion compensation; dispersion managed high bit rate communication systems; fiber lengths; fibre nonlinearity; group delay model; higher order dispersion compensation; in-fiber grating systems; linear dispersion; linear optical regime; linearly chirped Bragg gratings; linearly chirped grating; photonic switching applications; pulse compression; quadratically chirped gratings; reflection; self-phase modulation; solitons; ultra-short pulses; ultrashort pulse modelocked fiber laser sources;
Conference_Titel :
Optical Fibre Gratings and Their Applications, IEE Colloquium on
Conference_Location :
London
DOI :
10.1049/ic:19950088