Dr. Ankita Gaur Profile

Dr. Ankita Gaur

Post Doctoral Fellow

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Proceedings Article | 15 June 2015 Paper

High-power single-mode trench-assisted EDFA

Ankita Gaur, Vipul Rastogi

Proceedings Volume 9654, 96541K (2015) https://doi.org/10.1117/12.2181627

KEYWORDS: Optical amplifiers, Cladding, Silica, Amplifiers, Fiber amplifiers, Multimode fibers, Absorption, Physics, High power fiber amplifiers, Single mode fibers

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A trench assisted, 0.15-NA, effective single mode leaky Erbium Doped Fiber Amplifier is proposed for high power applications. The segmented-core of the fiber enables to achieve 783 μm² mode area which reduces nonlinearity and increases power handling capacity of the fiber. The leakage loss of the modes is controlled by annular core segments and low index trench in the cladding. The leakage loss of the LP₁₁ mode is 10.49 dB/m and that of the fundamental mode is 0.017 dB/m at 1530 nm wavelength. We have injected 20 mW power into each mode and have calculated the gain for 26 m length of the fiber using 250 W pump at 980 nm wavelength. The signal power in the LP01 mode is amplified to 122 W and that in the LP₁₁ mode drops down to 5.78×10^-27W. The low output signal power in LP₁₁mode ensures selective single mode amplification of fundamental mode. Selective single mode amplification confirms good beam quality at the output end.

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