Chirp reduction and on-off contrast enhancement via optical injection locking and coherent carrier manipulation
Chirp reduction and on-off contrast enhancement via optical injection locking and coherent carrier manipulation
The most cost-effective solution for modulating data on an optical carrier is via direct modulation of a semiconductor laser. Unfortunately, this technique suffers from high chirp. Although the chirp can be reduced by reducing the on/off modulation contrast ratio, keeping the signaling laser well above its threshold when transmitting both, logical ‘0’ and ‘1’, this results in limited on/off modulation contrast. There are several techniques for further suppression of the chirp, generally based on self-injection or optical injection locking of the directly-modulated laser (slave) to another laser (master) that emits cw light. However, this technique is very efficient only when the slave laser is operated well above the threshold, almost entirely removing the chirp, but not addressing the issue of limited on/off modulation contrast.
Slavík, R.
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Kakande, J.
70e0019d-0e99-4412-8104-97c84128ae27
Phelan, R.
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O'Carroll, J.
4bb1bac8-e2c9-4759-a7f4-770a7bb67674
Kelly, B.
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Richardson, D.J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
April 2013
Slavík, R.
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Kakande, J.
70e0019d-0e99-4412-8104-97c84128ae27
Phelan, R.
59941308-c3b0-4474-b5cb-d20243970a2c
O'Carroll, J.
4bb1bac8-e2c9-4759-a7f4-770a7bb67674
Kelly, B.
b022c0e7-c401-40cc-b646-ec55722f7c67
Richardson, D.J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Slavík, R., Kakande, J., Phelan, R., O'Carroll, J., Kelly, B. and Richardson, D.J.
(2013)
Chirp reduction and on-off contrast enhancement via optical injection locking and coherent carrier manipulation.
SPIE Optics + Optoelectronics, , Prague, Czech Republic.
15 - 18 Apr 2013.
7 pp
.
(doi:10.1117/12.2017230).
Record type:
Conference or Workshop Item
(Paper)
Abstract
The most cost-effective solution for modulating data on an optical carrier is via direct modulation of a semiconductor laser. Unfortunately, this technique suffers from high chirp. Although the chirp can be reduced by reducing the on/off modulation contrast ratio, keeping the signaling laser well above its threshold when transmitting both, logical ‘0’ and ‘1’, this results in limited on/off modulation contrast. There are several techniques for further suppression of the chirp, generally based on self-injection or optical injection locking of the directly-modulated laser (slave) to another laser (master) that emits cw light. However, this technique is very efficient only when the slave laser is operated well above the threshold, almost entirely removing the chirp, but not addressing the issue of limited on/off modulation contrast.
More information
Published date: April 2013
Venue - Dates:
SPIE Optics + Optoelectronics, , Prague, Czech Republic, 2013-04-15 - 2013-04-18
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 362946
URI: http://eprints.soton.ac.uk/id/eprint/362946
PURE UUID: ebe3460e-8c61-4546-a126-32a1228d995c
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Date deposited: 18 Mar 2014 10:16
Last modified: 15 Mar 2024 03:32
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Contributors
Author:
R. Slavík
Author:
J. Kakande
Author:
R. Phelan
Author:
J. O'Carroll
Author:
B. Kelly
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