Hambali Nor Azura Malini A, Mahdi Mohd Adzir, Al-Mansoori Mohammed Hayder, Abas Ahmad Fauzi, Saripan M Iqbal
Faculty of Engineering, Universiti Putra Malaysia, Wireless and Photonics Networks Research Center, 43400 UPM Serdang, Selangor, Malaysia.
Opt Express. 2009 Jul 6;17(14):11768-75. doi: 10.1364/oe.17.011768.
We have investigated the characteristics of Brillouin-Erbium fiber laser (BEFL) with variation of Erbium-doped fiber amplifier (EDFA) locations in a ring cavity configuration. Three possible locations of the EDFA in the laser cavity have been studied. The experimental results show that the location of EDFA plays vital role in determining the output power and the tuning range. Besides the Erbium gain, Brillouin gain also contributes to the performance of the BEFL. By placing the EDFA next to the Brillouin gain medium (dispersion compensating fiber), the Brillouin pump signal is amplified thereby generating higher intensities of Brillouin Stokes line. This efficient process suppresses the free running self-lasing cavity modes from oscillating in cavity as a result of higher Stokes laser power and thus provide a wider tuning range. At the injected Brillouin pump power of 1.6 mW and the maximum 1480 nm pump power of 135 mW, the maximum Stokes laser power of 25.1 mW was measured and a tuning range of 50 nm without any self-lasing cavity modes was obtained.
我们研究了在环形腔配置中，随着掺铒光纤放大器（EDFA）位置变化的布里渊 - 铒光纤激光器（BEFL）的特性。研究了EDFA在激光腔中的三种可能位置。实验结果表明，EDFA的位置在确定输出功率和调谐范围方面起着至关重要的作用。除了铒增益外，布里渊增益也对BEFL的性能有贡献。通过将EDFA放置在布里渊增益介质（色散补偿光纤）旁边，布里渊泵浦信号被放大，从而产生更高强度的布里渊斯托克斯线。由于更高的斯托克斯激光功率，这个高效过程抑制了自由运行的自激腔模在腔内振荡，从而提供了更宽的调谐范围。在注入的布里渊泵浦功率为1.6 mW和最大1480 nm泵浦功率为135 mW时，测量到最大斯托克斯激光功率为25.1 mW，并且获得了50 nm的调谐范围且没有任何自激腔模。
