Tailored modal gain in a multi-mode erbium-doped fiber amplifier based on engineered ring doping profiles

Cang Jin; Bora Ung; Younès Messaddeq; Sophie LaRochelle

doi:10.1117/12.2033945

11 October 2013 Tailored modal gain in a multi-mode erbium-doped fiber amplifier based on engineered ring doping profiles

Cang Jin, Bora Ung, Younès Messaddeq, Sophie LaRochelle

Author Affiliations +

Proceedings Volume 8915, Photonics North 2013; 89150A (2013) https://doi.org/10.1117/12.2033945
Event: Photonics North 2013, 2013, Ottawa, Canada

Abstract

Various space division multiplexing (SDM) schemes are currently investigated as a way to overcome the capacity limit of data links. We here focus on mode division multiplexing (MDM) in a multi-mode fiber (MMF). Towards long-haul data transmission, for which signal amplification is a key enabling component, we investigate a simple approach to precisely control the mode-dependent gain (MDG) between the co-propagating LP₀₁ and LP₁₁ modes of an erbium-doped few-mode fiber amplifier (MM-EDFA) by engineering a multi-ring doping profile. In practice, the mode dependent loss of the few-mode transmission fiber must be taken into account in order to equalize the gain for all modal channels. In a step towards practical implementation of MM-EDFA for long-haul SDM, we extend the single ring doping approach to incorporate multi-ring and multi-level doping. Through numerical simulations we study the optimization of the width and doping level of each ring so as to control the MDG. We further discuss the possibility of modal gain equalization through zero-differential modal gain (ZDMG) points in a single stage MM-EDFA, or via tuning of pump powers in a dual-stage MM-EDFA configuration.

Citation Download Citation

Cang Jin, Bora Ung, Younès Messaddeq, and Sophie LaRochelle "Tailored modal gain in a multi-mode erbium-doped fiber amplifier based on engineered ring doping profiles", Proc. SPIE 8915, Photonics North 2013, 89150A (11 October 2013); https://doi.org/10.1117/12.2033945

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