Brillouin-Raman fiber laser with switchable wavelength spacing based on Brillouin pump distribution
| Autor: | Noran Azizan Cholan, Yasmin Mustapha Kamil, A. W. Al-Alimi, Mohd Adzir Mahdi, Sameer Salam, M.H.M. Ahmed |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Raman scattering
Raman amplification Materials science Active laser medium QC1-999 General Physics and Astronomy 02 engineering and technology 01 natural sciences law.invention Optics law Fiber laser 0103 physical sciences Dispersion (optics) 010302 applied physics business.industry Physics Multi-wavelength fiber laser 021001 nanoscience & nanotechnology Laser Brillouin zone Wavelength Optical cavity 0210 nano-technology business Brillouin scattering Switchable fiber laser |
| Zdroj: | Results in Physics, Vol 25, Iss, Pp 104149-(2021) |
| ISSN: | 2211-3797 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|