dc.contributor.author |
Lee, M |
|
dc.contributor.author |
Zhu, Y |
|
dc.contributor.author |
Gauthier, DJ |
|
dc.contributor.author |
Gehm, ME |
|
dc.contributor.author |
Neifeld, MA |
|
dc.coverage.spatial |
United States |
|
dc.date.accessioned |
2012-02-13T16:28:47Z |
|
dc.date.issued |
2011-11-10 |
|
dc.identifier |
http://www.ncbi.nlm.nih.gov/pubmed/22083377 |
|
dc.identifier |
224132 |
|
dc.identifier.uri |
https://hdl.handle.net/10161/5103 |
|
dc.description.abstract |
We use an information-theoretic method developed by Neifeld and Lee [J. Opt. Soc.
Am. A 25, C31 (2008)] to analyze the performance of a slow-light system. Slow-light
is realized in this system via stimulated Brillouin scattering in a 2 km-long, room-temperature,
highly nonlinear fiber pumped by a laser whose spectrum is tailored and broadened
to 5 GHz. We compute the information throughput (IT), which quantifies the fraction
of information transferred from the source to the receiver and the information delay
(ID), which quantifies the delay of a data stream at which the information transfer
is largest, for a range of experimental parameters. We also measure the eye-opening
(EO) and signal-to-noise ratio (SNR) of the transmitted data stream and find that
they scale in a similar fashion to the information-theoretic method. Our experimental
findings are compared to a model of the slow-light system that accounts for all pertinent
noise sources in the system as well as data-pulse distortion due to the filtering
effect of the SBS process. The agreement between our observations and the predictions
of our model is very good. Furthermore, we compare measurements of the IT for an optimal
flattop gain profile and for a Gaussian-shaped gain profile. For a given pump-beam
power, we find that the optimal profile gives a 36% larger ID and somewhat higher
IT compared to the Gaussian profile. Specifically, the optimal (Gaussian) profile
produces a fractional slow-light ID of 0.94 (0.69) and an IT of 0.86 (0.86) at a pump-beam
power of 450 mW and a data rate of 2.5 Gbps. Thus, the optimal profile better utilizes
the available pump-beam power, which is often a valuable resource in a system design.
|
|
dc.language |
eng |
|
dc.language.iso |
en_US |
|
dc.publisher |
The Optical Society |
|
dc.relation.ispartof |
Appl Opt |
|
dc.title |
Information-theoretic analysis of a stimulated-Brillouin-scattering-based slow-light
system.
|
|
dc.type |
Journal article |
|
duke.contributor.id |
Gauthier, DJ|0095580 |
|
duke.contributor.id |
Gehm, ME|0095766 |
|
duke.description.issue |
32 |
|
duke.description.volume |
50 |
|
pubs.author-url |
http://www.ncbi.nlm.nih.gov/pubmed/22083377 |
|
pubs.begin-page |
6063 |
|
pubs.end-page |
6072 |
|
pubs.issue |
32 |
|
pubs.organisational-group |
Duke |
|
pubs.organisational-group |
Electrical and Computer Engineering |
|
pubs.organisational-group |
Physics |
|
pubs.organisational-group |
Pratt School of Engineering |
|
pubs.organisational-group |
Trinity College of Arts & Sciences |
|
pubs.publication-status |
Published |
|
pubs.volume |
50 |
|
dc.identifier.eissn |
1539-4522 |
|
duke.contributor.orcid |
Gehm, ME|0000-0003-4163-749X |
|