Novel Single Clad Ho-doped Fiber with High Slope Efficiency and Low Ion Pairing
Abstract
We report the design and experimental and simulated performance for a 2050 nm band fiber amplifier with high optical-optical slope efficiency and low ion pairing, using a novel high performance single clad Ho-doped fiber from the Naval Research Laboratory (NRL). We measure an optical-optical slope efficiency of 57% using 1 mW input signal power and 1860 nm pumping which we believe is the highest slope efficiency obtained to date for a single clad single stage copumped HDFA. A new method for non-destructive measurement of the ion pairing coefficient in Ho-doped fibers is introduced and validated. Using this method, we link our 57% slope efficiency to a low ion pairing coefficient of 4% in the NRL Ho-doped fiber as derived from our experimental data. We present an overview and survey of the ion pairing results for Ho-doped fiber amplifiers and lasers reported so far in the literature.
Cite
@article{arxiv.2604.00823,
title = {Novel Single Clad Ho-doped Fiber with High Slope Efficiency and Low Ion Pairing},
author = {Robert E. Tench and Wiktor Walasik and Alexandre Amavigan and Jean-Marc Delavaux and Colin C. Baker and Daniel Rhonehouse},
journal= {arXiv preprint arXiv:2604.00823},
year = {2026}
}
Comments
6 pages, 7 figures, 1 table