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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
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.
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Kakande, J.
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Phelan, R.
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O'Carroll, J.
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Kelly, B.
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Richardson, D.J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
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.

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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: https://eprints.soton.ac.uk/id/eprint/362946
PURE UUID: ebe3460e-8c61-4546-a126-32a1228d995c
ORCID for R. Slavík: ORCID iD orcid.org/0000-0002-9336-4262
ORCID for D.J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058

Catalogue record

Date deposited: 18 Mar 2014 10:16
Last modified: 15 Oct 2019 00:55

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