Abstract

Mode division multiplexing (MDM) is considered to be an efficient solution to alleviate the exponentially increasing “capacity crunch”. Here, we numerically and experimentally demonstrate a high power-efficiency, low differential mode gain (DMG) few-mode amplifier based on an M-type double-cladding Er/Yb co-doped phosphosilicate fiber. With a large-signal power of 4.1 dBm, the average DMG of <1.5 dB and the maximum gain of >28 dB were achieved for the LP₀₁, LP₁₁, LP_21, and LP₀₂ mode groups over the 1535–1565 nm range. Additionally, the saturation output power was measured in excess of 35 dBm, with a pump conversion efficiency (PCE) of >31%. This cladding-pumped few-mode Er/Yb co-doped fiber amplifier enables combined mode-division and wavelength-division multiplexed over large-capacity long-haul MDM transmission.

Extended L-band few-mode Er/Yb Co-doped fiber amplifier with a cladding-pumped pseudo-two-stage configuration

Qiang Qiu, Le He, Zhimu Gu, Yang Chen, Yang Lou, Xinyue Zhao, Jinggang Peng, Haiqing Li, Yingbin Xing, Yingbo Chu, Nengli Dai, and Jinyan Li
Opt. Lett. 47(12) 2963-2966 (2022)

High-efficiency cladding-pumped Er/Yb co-doped alumino-phosphosilicate fiber for an extended L-band amplification

Le He, Yang Chen, Xiaoke Yin, Zhimu Gu, Shaokun Liu, Wenzhen Li, Yingbin Xing, Yingbo Chu, Nengli Dai, and Jinyan Li
Opt. Lett. 49(1) 61-64 (2024)

Extended L-band 4-Core Er/Yb co-doped fiber amplifier based on 1018 nm cladding pumping

Le He, Qiang Qiu, Xiaoke Yin, Zhimu Gu, Shaokun Liu, Wenzhen Li, Yingbin Xing, Yingbo Chu, Nengli Dai, and Jinyan Li
Opt. Express 31(16) 25557-25570 (2023)

Efficiency optimization of high-power, Er ³⁺ –Yb ³⁺ -codoped fiber amplifiers for wavelength-division-multiplexing applications

Eldad Yahel and Amos Hardy
J. Opt. Soc. Am. B 20(6) 1189-1197 (2003)

Numerical model of an Er³⁺/Yb³⁺ co-doped seven-core fiber amplifier for a space division multiplexing system

Ali Nassiri, Abdelkader Boulezhar, and H. Idrissi Saba
J. Opt. Soc. Am. A 37(11) C50-C56 (2020)