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7 March 2019 Numerical investigation of high efficiency random fiber lasers at 1.5 μm
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Abstract
High power and high efficiency random fiber laser working at 1.5μm with mixed Erbium-Raman gain was theoretically proposed. The numerical model based on rating equations was established to analysis the laser performance of Erbium-Raman gain random fiber laser by different pump schemes. The optical-optical conversion efficiency reached 90% when pump power is 100W by forward pump scheme in the 1.5μm regime. Our work supplied an effective design for high efficiency and high power random fiber laser at 1.5μm which can be used for optical fiber sensing, research and communication. In our simulations results we found that forward pump scheme is better than backward pump scheme and bidirectional pump scheme in high power 1.5μm random laser, besides forward pump scheme is better than the other two pump schemes because of its compact, high efficiency and low costs, we also found that long Er-doped fiber (EDF) fiber length had good effect on the laser efficiency, the fiber length of single mode fiber (SMF) from 200m to 1km had little effect on laser efficiency. This design of 1.5μm random fiber laser can be a useful theoretical guidance for experiment and diverse wavelength could be achieved by the seed of 1.5μm random fiber laser.
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Zhaoxin Xie, Wei Shi, Quan Sheng, and Jianquan Yao "Numerical investigation of high efficiency random fiber lasers at 1.5 μm", Proc. SPIE 10897, Fiber Lasers XVI: Technology and Systems, 108970P (7 March 2019); https://doi.org/10.1117/12.2509397
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