Brillouin-Raman fiber laser with switchable wavelength spacing based on Brillouin pump distribution

Al-Alimi, Abdulmoghni Wazae and Cholan, Noran Azizan and Salam, Sameer and Kamil, Yasmin Mustapha and Mohamed Ahmed, Mahmoud Hazzaa and Mahdi, Mohd Adzir (2021) Brillouin-Raman fiber laser with switchable wavelength spacing based on Brillouin pump distribution. Results in Physics, 25. ISSN 2211-3797

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Abstract

A switchable multi-wavelength Brillouin-Raman fiber laser (MW-BRFL) is presented in this work. The MW-BRFL consists of a full-open linear cavity in which dispersion compensating fiber is employed as the gain medium for Brillouin and Raman amplification. The switching operation for single- and double-wavelength spacing MW�BRFL can be implemented by controlling Brillouin pump (BP) power distribution and direction that enters the laser cavity via two fiber-entry points. This is achievable by optimizing the splitting ratio of an optical coupler and the initial BP power. For the proposed laser setup, a 30/70 optical coupler was found to be the optimum. By setting the initial BP power at − 3.0 dBm, 246 laser lines with 20-GHz frequency spacing were observed. The transformation to 10-GHz frequency spacing was attained by increasing the BP power to 11.8 dBm that resulted in 483 laser lines. All the counted laser lines had 3 dB peak power variation and were spread across a 38 nm bandwidth. In a nutshell, the proposed MW-BRFL is promising with respect to its performance, simplicity and flexibility.

Item Type:	Article
Uncontrolled Keywords:	Switchable fiber laser; brillouin scattering; raman scattering; multi-wavelength fiber laser
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ212-225 Control engineering systems. Automatic machinery (General)
Divisions:	Faculty of Electrical and Electronic Engineering > Department of Electronic Enngineering
Depositing User:	Mr. Abdul Rahim Mat Radzuan
Date Deposited:	07 Apr 2022 02:37
Last Modified:	07 Apr 2022 02:37
URI:	http://eprints.uthm.edu.my/id/eprint/6887

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