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

Al-Alimi, A. W. and Khaleel, W. A. and Sadeq, S. A. and Cholan, N. A. and Al-Mansoori, M. H. and M. Ahmed, M. H. and Mahdi, M.A. (2022) Switchable single-double frequency multi-wavelength Brillouin Raman fiber laser based on micro-air cavity misalignment. Optics and Laser Technology, 146. pp. 1-10. ISSN 0030-3992

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Official URL: https://doi.org/10.1016/j.optlastec.2021.107464

Abstract

This study experimentally demonstrates a switchable single-double frequency spacing multi-wavelength Bril�louin 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 pro�duced 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.

Item Type:	Article
Uncontrolled Keywords:	Brillouin scattering;multi-wavelength fiber laser; Raman scattering Micro-air cavity
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television
Depositing User:	Mr. Abdul Rahim Mat Radzuan
Date Deposited:	07 Apr 2022 02:31
Last Modified:	07 Apr 2022 02:31
URI:	http://eprints.uthm.edu.my/id/eprint/6888

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