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Advanced fibre Bragg gratings for high performance dispersion compensation in DWDM systems

Advanced fibre Bragg gratings for high performance dispersion compensation in DWDM systems
Advanced fibre Bragg gratings for high performance dispersion compensation in DWDM systems
The increasing application of DWDM transmission schemes with bit rates of 10 Gb/s and 50 GHz channel spacing places a strict requirement on dispersion management. The use of chirped fibre Bragg gratings to compensate the dispersion of fibre links is a well-known approach that has become increasingly prevalent over recent years. An ideal dispersion compensator should either provide continuous operation over the full bandwidth of a transmission system, or be capable of being closely packed with other such devices in order that every available DWDM channel can be transmitted. These criteria have, to date, been difficult to fulfill with grating technology: a single dispersion compensating grating with a bandwidth of >30nm needs to be several metres in length raising questions of fabrication practicality and packaging concerns; traditional short (<10cm) chirped gratings, which may be packaged athermally and are more straightforward to fabricate, have a low bandwidth filling-factor, and a non-linear group delay response. In this paper, we present, for the first time, experimental results of gratings designed by a newly-developed layer-peeling inverse-scattering algorithm for single-channel dispersion compensation compatible with 50 GHz DWDM channel spacing. Gratings made by this design procedure have a very high bandwidth utilisation factor, both in terms of reflectivity and linear group delay. They are designed to accommodate RZ signals on a 50 GHz grid, but alternatively will provide high ASE rejection on a 100 GHz grid whilst maintaining a broad useable bandwidth. We believe that this approach overcomes the limitations normally associated with short chirped gratings, whilst retaining their desirable fabrication and packaging characteristics.
Durkin, M.K.
37540512-83f6-4256-b839-022e1675a6d2
Feced, R.
b62081fc-fcad-48e6-a957-0ec55f6efe7f
Ramirez, C.
8068fa02-393e-4faf-b10a-78394673e17c
Zervas, M.N.
1840a474-dd50-4a55-ab74-6f086aa3f701
Durkin, M.K.
37540512-83f6-4256-b839-022e1675a6d2
Feced, R.
b62081fc-fcad-48e6-a957-0ec55f6efe7f
Ramirez, C.
8068fa02-393e-4faf-b10a-78394673e17c
Zervas, M.N.
1840a474-dd50-4a55-ab74-6f086aa3f701

Durkin, M.K., Feced, R., Ramirez, C. and Zervas, M.N. (2000) Advanced fibre Bragg gratings for high performance dispersion compensation in DWDM systems. OFC 2000. 07 - 12 Mar 2000.

Record type: Conference or Workshop Item (Paper)

Abstract

The increasing application of DWDM transmission schemes with bit rates of 10 Gb/s and 50 GHz channel spacing places a strict requirement on dispersion management. The use of chirped fibre Bragg gratings to compensate the dispersion of fibre links is a well-known approach that has become increasingly prevalent over recent years. An ideal dispersion compensator should either provide continuous operation over the full bandwidth of a transmission system, or be capable of being closely packed with other such devices in order that every available DWDM channel can be transmitted. These criteria have, to date, been difficult to fulfill with grating technology: a single dispersion compensating grating with a bandwidth of >30nm needs to be several metres in length raising questions of fabrication practicality and packaging concerns; traditional short (<10cm) chirped gratings, which may be packaged athermally and are more straightforward to fabricate, have a low bandwidth filling-factor, and a non-linear group delay response. In this paper, we present, for the first time, experimental results of gratings designed by a newly-developed layer-peeling inverse-scattering algorithm for single-channel dispersion compensation compatible with 50 GHz DWDM channel spacing. Gratings made by this design procedure have a very high bandwidth utilisation factor, both in terms of reflectivity and linear group delay. They are designed to accommodate RZ signals on a 50 GHz grid, but alternatively will provide high ASE rejection on a 100 GHz grid whilst maintaining a broad useable bandwidth. We believe that this approach overcomes the limitations normally associated with short chirped gratings, whilst retaining their desirable fabrication and packaging characteristics.

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More information

Published date: 2000
Additional Information: TuH4
Venue - Dates: OFC 2000, 2000-03-07 - 2000-03-12

Identifiers

Local EPrints ID: 16992
URI: https://eprints.soton.ac.uk/id/eprint/16992
PURE UUID: d2d18ca9-f871-4cad-9805-e1abb62eb735
ORCID for M.N. Zervas: ORCID iD orcid.org/0000-0002-0651-4059

Catalogue record

Date deposited: 26 Aug 2005
Last modified: 02 Oct 2018 00:37

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