Enhancement of Brillouin gain efficiency in multiwavelength L-band befl by utilizing bi-directional Brillouin pump amplification

• Main Authors: Al-Mansoori M.H., Mahdi M.A., Jamaludin M.Z., Din N.M., Abdullah F.
• Other Authors: 6505891021
• Format: Article
• Published: Optical Society of American (OSA) 2023
• Subjects: Amplification; Erbium; Fibers; Pumping (laser); Pumps; Bi-directional; Brillouin; Brillouin gain; Brillouin pump; Gain medium; High peak power; Laser architecture; Multiwavelength; Output channels; Preamplification; Pump power; Shot length; Wavelength separation; Fiber lasers

Enhancement of Brillouin gain efficiency in a multiwavelength L-band Brillouin-erbium comb fiber laser is presented. In this laser architecture, bi-directional amplification of the injected Brillouin pump signal within the erbium gain medium, before entering the single-mode fiber was utilized. Owing to this bi-directional preamplification of the Brillouin pump power, the requirement of a long single-mode fiber to increase the Brillouin gain efficiency was overcome. The shot length of a single-mode fiber was utilized to achieve a high number of output channels with high peak power. Up to 25 output channels with a constant wavelength separation of 0.089 nm were achieved at 170 mW of 1480 nm pump power and 0.54 mW of Brillouin pump power in a 0.5 km short single-mode fiber. � 2010 Optical Society of America.