The University of Southampton
University of Southampton Institutional Repository

Excitation of individual Raman Stokes lines of up-to 10th order using rectangular shaped optical pulses at 530nm

Excitation of individual Raman Stokes lines of up-to 10th order using rectangular shaped optical pulses at 530nm
Excitation of individual Raman Stokes lines of up-to 10th order using rectangular shaped optical pulses at 530nm
We demonstrate the selective excitation of Raman Stokes lines of up-to 9th order with relatively high extinction ratio pumped by rectangular shaped optical pulses at 530 nm of 100 ns duration. The rectangular shaped optical pulses at 530 nm were generated by frequency doubling of an adaptively pulse shaped fiber MOPA operating at 1060 nm. This kind of pulse shape is optimal for frequency conversion since all parts of the pulse experiences the same Raman gain. Therefore, it is possible for a pulse to transfer all of its energy through sequential frequency Raman shifts to successive order Stokes components. Consequently, by adjusting the pump power it is possible to achieve selective excitation of the Raman shift with little residual pump powers. Here, we have achieved extinction ratio as much as 15 dB from successive Stokes lines by coupling 530 nm light in a 1 km long Pirelli Freelight fiber. In addition, we were able to obtain up-to 9th order Stokes shift by launching 5 W of average pump power to the Raman gain medium. Maximum Stokes shifted power of 54 mW was recorded for a launched pump power of 5W. We attribute this to the large background loss of silica fibre in the visible region.
7582-7617
Chen, K.K.
63467a65-7428-4662-9810-3230e43dc4d4
Alam, S.-U.
2b6bdbe5-ddcc-4a88-9057-299360b93435
Codemard, C.A
3aa50483-b61c-4e7e-b178-c9a88bb47bef
Malinowski, A.
54fd31d4-b510-4726-a8cd-33b6b2ad0427
Richardson, D.J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Chen, K.K.
63467a65-7428-4662-9810-3230e43dc4d4
Alam, S.-U.
2b6bdbe5-ddcc-4a88-9057-299360b93435
Codemard, C.A
3aa50483-b61c-4e7e-b178-c9a88bb47bef
Malinowski, A.
54fd31d4-b510-4726-a8cd-33b6b2ad0427
Richardson, D.J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3

Chen, K.K., Alam, S.-U., Codemard, C.A, Malinowski, A. and Richardson, D.J. (2010) Excitation of individual Raman Stokes lines of up-to 10th order using rectangular shaped optical pulses at 530nm. SPIE Photonics West, United States. 23 - 28 Jan 2010. pp. 7582-7617 . (doi:10.1117/12.845933).

Record type: Conference or Workshop Item (Paper)

Abstract

We demonstrate the selective excitation of Raman Stokes lines of up-to 9th order with relatively high extinction ratio pumped by rectangular shaped optical pulses at 530 nm of 100 ns duration. The rectangular shaped optical pulses at 530 nm were generated by frequency doubling of an adaptively pulse shaped fiber MOPA operating at 1060 nm. This kind of pulse shape is optimal for frequency conversion since all parts of the pulse experiences the same Raman gain. Therefore, it is possible for a pulse to transfer all of its energy through sequential frequency Raman shifts to successive order Stokes components. Consequently, by adjusting the pump power it is possible to achieve selective excitation of the Raman shift with little residual pump powers. Here, we have achieved extinction ratio as much as 15 dB from successive Stokes lines by coupling 530 nm light in a 1 km long Pirelli Freelight fiber. In addition, we were able to obtain up-to 9th order Stokes shift by launching 5 W of average pump power to the Raman gain medium. Maximum Stokes shifted power of 54 mW was recorded for a launched pump power of 5W. We attribute this to the large background loss of silica fibre in the visible region.

Full text not available from this repository.

More information

e-pub ahead of print date: 23 January 2010
Venue - Dates: SPIE Photonics West, United States, 2010-01-23 - 2010-01-28

Identifiers

Local EPrints ID: 180625
URI: https://eprints.soton.ac.uk/id/eprint/180625
PURE UUID: dd3c0438-64d7-4cca-bd3f-7127b25a6c12
ORCID for D.J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058

Catalogue record

Date deposited: 13 Apr 2011 08:44
Last modified: 29 Aug 2019 00:54

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×