OSNR enhancement utilizing large effective area fiber in a multiwavelength Brillouin-Raman fiber laser.

• Main Authors: Shargh, R. Sonee, Al-Mansoori, M.H., Ahmad Anas, Siti Barirah, Sahbudin, Ratna Kalos Zakiah, Mahdi, Mohd Adzir
• Format: Article
• Language: English; English
• Published: Wiley-Blackwell 2011
• Online Access: http://psasir.upm.edu.my/id/eprint/23493/1/OSNR%20enhancement%20utilizing%20large%20effective%20area%20fiber%20in%20a%20multiwavelength%20Brillouin.pdf; http://psasir.upm.edu.my/id/eprint/23493/; http://onlinelibrary.wiley.com/‎

We propose a simple Brillouin-Raman multichannel fiber laser with supportive Rayleigh scattering in a linear cavity without employing any feedback mirrors at the end of cavity. Brillouin and the consequences of Rayleigh scattering work as virtual mirrors. We employ a section of large effective area fiber in addition to a section of dispersion compensating fiber to enhance the optical signal-to-noise ratio of multi-channel Brillouin-Raman comb fiber laser. We able to produce a flat comb fiber laser with 37 nm bandwidth from 1539 to 1576 nm built-in 460 Stokes lines with 0.08 nm spacing. Furthermore, this Brillouin-Raman comb fiber laser has acceptable optical signal-to-noise ratio value of 16.8 dB for the entire bandwidth with excellent flatness and low discrepancies in power levels of about 2.3 dB between odd and even channels.