Optimization of Brillouin pump wavelength location on tunable multiwavelength BEFL

Abstract

Optimization of Brillouin pump (BP) wavelength location on tunable multiwavelength Brillouin-erbium fiber laser (BEFL) with BP pre-amplified technique is experimentally investigated. The tunable multiwavelength BEFL is achieved by utilization a tunable bandpass filter in a laser cavity. The optimum BP power and BP wavelength location within the filter bandwidth is determined in order to obtain the maximum stable output channels. Optimum distance of launching the BP wavelength is found at 0.80 nm shorter from the center wavelength of the filter bandwidth. 15 stable output channels are achieved from the tunable fiber laser system within the optimum range of BP power which is found to be between 5.2 to 5.7 dBm.

Nonlinear Fiber Loop Mirror Optimization to Enhance the Performance of Multiwavelength Brillouin/Erbium-Doped Fiber Laser

“…Later, different techniques have been proposed to improve the linear cavity BEFL performance such as pre-amplified Brillouin pump (BP) power techniques [18]. In those designs, the BP power is amplified before being launched into the optical fiber, which resulted in the reduction of threshold power [7]- [12]. By utilizing this technique, up to 26 Stokes lines including BP wavelength were generated at EDF pump power of 90 mW and BP power of 3 dBm [19].…”

“…In another ring cavity BEFL, up to 60 mW and 180 mW of EDF pump power were required for the first and for 24th Stokes line generation, respectively. Later, many different BEFL designs and different techniques have been proposed to improve threshold power and number of Stokes lines [6]- [12]. For example, the SBS threshold power can be improved by feeding back the generated Stokes lines into the laser cavity by utilizing reverse-S-shaped configuration [6].…”

“…By utilizing this technique, up to 26 Stokes lines including BP wavelength were generated at EDF pump power of 90 mW and BP power of 3 dBm [19]. In the existing configurations of linear BEFL [6]- [12], besides the requirement of two physical mirrors, an additional coupler is needed for inserting the BP power into the laser cavity.…”

Low threshold multiwavelength Brillouin–erbium fiber laser generation in conjunction with a photonic crystal fiber

“…Multiwavelength BFLs are stable at room temperature with a narrow equal-spacing of 0.08 nm in wavelength and a low threshold [7][8][9]. However, the practical contribution of multiwavelength BFLs in optical system implementation is also limited due to the difficulty of channel demultiplexing from the narrow (∼10 GHz) spacing [10][11][12].…”

Improvement of comb lines quality employing double-pass architecture in Brillouin-Raman laser

“…Although Brillouin gain can be utilized solely for the generation of single [1] or multichannel lasers [2,3], its low gain is not able to create higher number of lasers. Therefore additional gain from active gain medium such as er-bium is utilized to compensate the cavity loss [4][5][6]. Alternatively, since the Brillouin gain is proportional to the fiber length, this long waveguide can also be utilized to generate other nonlinear effect of stimulated Raman scattering (SRS) [7].…”