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Switchable single-double frequency multi-wavelength Brillouin Raman fiber laser based on micro-air cavity misalignment


A. W., Al-Alimi and W. A., Khaleel and S. A., Sadeq and N. A., Cholan and M. H., Al-Mansoori and Ahmed, M. H. M. and M. A., Mahdi (2022) Switchable single-double frequency multi-wavelength Brillouin Raman fiber laser based on micro-air cavity misalignment. Optics & Laser Technology, 146. art. no. 107464. pp. 1-10. ISSN 0030-3992; ESSN: 1879-2545


This study experimentally demonstrates a switchable single-double frequency spacing multi-wavelength Brillouin Raman fiber laser (MW-BRFL). The switching functionality was assisted by a micro air cavity (MAC) that was constructed by lateral misalignment of two cleaved fiber facets. Experimental results indicated that the frequency spacing of the generated channels could be switched via adjusting the MAC lateral misalignment. The laser performance was evaluated by fixing the peak power flatness to 1.5 dB. For Raman pump power of 800 mW, as many as 503 channels (39.72 nm bandwidth) with single frequency spacing of 0.079 nm were obtained when the lateral misalignment was set at 0 µm. On the other hand, with MAC misalignment of 25 µm, the laser produced 235 channels (37.03 nm bandwidth) with double frequency spacing of 0.158 nm. The peak power discrepancy between the odd and even channels was 20 dB, indicating high suppression of double-frequency spacing laser. In comparison to other switchable MW-BRFLs, this proposed configuration exhibited significant improvements with respect to channel bandwidth, flatness and suppression.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1016/j.optlastec.2021.107464
Publisher: Elsevier
Keywords: Brillouin scattering; Multi-wavelength fiber laser; Raman scattering; Micro-air cavity
Depositing User: Ms. Nuraida Ibrahim
Date Deposited: 13 Jun 2023 07:35
Last Modified: 13 Jun 2023 07:35
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.optlastec.2021.107464
URI: http://psasir.upm.edu.my/id/eprint/103385
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