In-band dispersion limitations of uniform apodised fibre gratings

Ibsen, M., Geiger, H. and Laming, R.I. (1998) In-band dispersion limitations of uniform apodised fibre gratings. In Proceedings of 24th European Conference on Optical Communication. IEEE. pp. 413-414 .

Record type: Conference or Workshop Item (Paper)

Abstract

Apodisation-generated in-band dispersion can limit the useful bandwidth of gratings. We discuss how a trade-off in reflection squareness may be necessary in order to increase the useful bandwidth.
Introduction: Wavelength-division multiplexing (WDM) is widely recognised as the technology of choice to utilise the fibre bandwidth. The key enabling technology for WDM is grating-based filters, offering low insertion loss over a wide bandwidth and good suppression of neighbouring channels when properly designed. It has recently been discussed how the dispersion on the edges of the photonic bandgap of a grating both in-band and out-of-band can cause the reflected and transmitted signals to be significantly distorted.
In this paper we show that apodisation-induced in-band dispersion can limit the useful bandwidth of gratings considered for current transmission systems. We discuss design rules depending on apodisation and length for an optimisation of the useful bandwidth.

Text

1645 - Author's Original

Available under License University of Southampton Accepted Manuscript Licence.

Download (162kB)