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Impact of Booster Section Length on the Performance of Linear Cavity Brillouin-Erbium Fiber Laser
Thamer Fahad Al-Mashhadani,Md Zaini Jamaludin,Mohammed Hayder Al-Mansoori,Abdulla Khudair Abbas,Fairuz Abdullah 한국광학회 2014 Current Optics and Photonics Vol.18 No.2
The impact of booster section length made from passive erbium-doped fiber (EDF) on the L-band multiwavelength Brillouin-Erbium fiber laser (MBEFL) is studied experimentally in this paper. The influence on the performance of MBEFL in term of number of generated Stokes lines, tuning range and lasing threshold were investigated. A comparison was made between MBEFL without a booster section and with booster sections of different lengths. Through comparative study and at fixed BP power and 100mW of 1480 pump power, longer passive EDF length of 5m exhibits the highest average number of Stokes lines of 23 with tuning range of 14nm. In contrast, shorter passive EDF length of 1m shows the highest tuning range of 17nm and an average number of 21 Stokes lines.
Simulation and Experimental Validation of Gain-Control Parallel Hybrid Fiber Amplifier
Mudhafar Hussein Ali,Md Zaini Jamaludin,Mohammed Hayder Al-Mansoori,Thamer Fahad Al-Mashhadani,Abdulla Khudiar Abass,Fairuz Abdullah 한국광학회 2014 Current Optics and Photonics Vol.18 No.6
We demonstrate a simulation of a parallel hybrid fiber amplifier in the C+L-band with a gain controlling technique. A variable optical coupler is used to control the input signal power for both EDFA and RFA branches. The gain spectra of the C+L-band are flattened by optimizing the coupling ratio of the input signal power. In order to enhance the pump conversion efficiency, the EDFA branch was pumped by the residual Raman pump power. A gain bandwidth of 60 nm from 1530 nm to 1590 nm is obtained with large input signal power less than -5 dBm. The gain variation is about 1.06 dB at a small input signal power of -30 dBm, and it is reduced to 0.77 dB at the large input signal power of -5 dBm. The experimental results show close agreement with the simulation results.