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Frequency switching multiwavelength Brillouin Raman fibre laser based on feedback power adjustment technique

Ahmad, Harith and Al-Alimi, Abdulmoghni Wazae and Abdul Kadir, Zamzuri and Bayang, Leonard and Ismail, Mohammad Faizal and Thambiratnam, Kavintheran (2020) Frequency switching multiwavelength Brillouin Raman fibre laser based on feedback power adjustment technique. Journal of Modern Optics, 2020. pp. 1-7. ISSN 0950-0340 E-ISSN 1362-3044

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Abstract

A simple switchable multiwavelength Brillouin–Raman fibre laser (BRFL) was demonstrated. The laser was arranged in a half-open cavity configuration including a physical mirror device with an adjustable reflectivity at one side of the laser cavity. The impact of the feedback power adjustment on frequency switching was carried out by comparing the peak power difference between odd- and even-order Stokes lines. Up to 468 flat-amplitude lines with a 10 GHz frequency spacing and average optical signal to noise ratio (OSNR) of 33 dB were observed with mirror reflectivity values of ∼15% up to 60% at a 1534nm Brillouin pump power of 7 dBm and 0.9W Raman pump power of 0.9 W. Under the same pumping conditions, setting the mirror reflectivity at its OFF state (where reflectivity is nearly 0%) allows for up to 242 lines with 20 GHz spacing to be realized, with ONSR values of ∼35 dB.

Item Type: Article (Journal)
Additional Information: 7753/82064
Uncontrolled Keywords: Brillouin Raman
Subjects: Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Science > Department of Physics
Depositing User: MUHAMMAD ZAMZURI ABDUL KADIR
Date Deposited: 11 Aug 2020 16:09
Last Modified: 10 Sep 2020 11:28
URI: http://irep.iium.edu.my/id/eprint/82064

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