Three mode Er3+ ring-doped fiber amplifier for mode-division multiplexed transmission

Area of Science:

• Optical Engineering
• Telecommunications
• Materials Science

Background:

• Mode-division multiplexing (MDM) offers a path to increase optical fiber transmission capacity.
• Erbium-doped fibers are crucial for optical amplification in communication systems.
• Controlling modal gain is essential for effective MDM system performance.

Purpose of the Study:

• To fabricate and characterize a three-mode erbium-doped fiber amplifier.
• To mitigate differential modal gain in active fibers for MDM.
• To evaluate amplifier performance in a mode-division multiplexed transmission system.

Main Methods:

• Fabrication of a three-mode fiber with a confined Er(3+) doped ring structure.
• Experimental characterization of amplifier performance under varying conditions.
• Analysis of modal gain properties, inter-modal cross-gain modulation, and transient effects.

Main Results:

• Successful fabrication of a three-mode erbium-doped fiber.
• Effective mitigation of differential modal gain through controlled doping layer thickness and pump launch.
• Detailed analysis of modal gain and cross-gain modulation effects.

Conclusions:

• The developed three-mode fiber amplifier shows promise for MDM transmission.
• Controlling fiber design and pump conditions is key to managing modal gain.
• Further research can optimize this technology for advanced optical networks.