| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 6, 2011
|
|
|---|---|---|
| Article Number | 11043 | |
| Number of page(s) | 4 | |
| DOI | https://doi.org/10.2971/jeos.2011.11043 | |
| Published online | 01 September 2011 | |
Regular papers
Tunable Raman fiber laser induced by Rayleigh back-scattering in an ultra-long cavity
1
Wireless and Photonics Network Research Center, Faculty of Engineering, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
2
Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
Received:
4
May
2011
We report an ultra-long Raman laser with a 46 km fiber length that behaved as a Rayleigh back-scattering–based optical feedback. The laser was tunable from 1550 nm to 1571 nm (3 dB bandwidth) with the insertion of an optical grating filter. Evaluations on the spectral evolution and power development were also performed from the results obtained. In fact, it was discovered that the spectral broadening effect between the modeless spectra resembled the same process that happens in a typical fiber cavity that has high reflectors at each cavity end. In addition, the output power showed a square-root development with respect to the input power.
Key words: Raman fiber laser / Rayleigh scattering / spectral broadening
© The Author(s) 2011. All rights reserved.
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