@inproceedings{aa9ae1fa7dae4b02b4cef9cc72a46063,
title = "Advancing athermal silica fiber lasers to watt-level power and beyond",
abstract = "Waste heat in fiber lasers poses major challenges in frequency, power, and pointing stabilities, as well as beam quality and power scaling. Using anti-Stokes-fluorescence cooling, we developed a radiation-balanced Yb-doped silica fiber amplifier with a novel aluminophosphosilicate core-glass composition that delivers 575 mW with no net internal heat generation by amplifying a 0.9-mW seed at 1064 nm (28.0 dB of gain). With a lower seed power (0.4 mW), a radiation-balanced gain of 31.5 dB was achieved. We discuss the strategies and recent progress in silicate-glass engineering that enabled this breakthrough performance in a small-core fiber at atmospheric pressure, as well as the potential for power-scaling radiation-balanced fiber lasers to the 100-watt level through advanced fiber designs. Our findings point to a promising path for stable high-power operation free from thermal limitations.",
keywords = "Fiber laser, anti-Stokes fluorescence, laser cooling, rear earth, silica fiber, silicate glass, single-frequency amplifier, thermal management",
author = "Chen, {Chun Wei} and Enkeleda Balliu and Bailey Meehan and Hawkins, {Thomas W.} and John Ballato and Dragic, {Peter D.} and Tommy Boilard and Martin Bernier and Digonnet, {Michel J.F.}",
note = "The Stanford authors thank H\u00DCBNER Photonics, Clemson University, and the J. E. Sirrine Foundation. The Clemson authors acknowledge the J. E. Sirrine Foundation for financial support. The Universit\u00E9 Laval authors acknowledge the Natural Sciences and Engineering Research Council of Canada (RGPIN-2016-05877).; Photonic Heat Engines: Science and Applications VII 2025 ; Conference date: 29-01-2025 Through 30-01-2025",
year = "2025",
doi = "10.1117/12.3051937",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Seletskiy, {Denis V.} and Kuno, {Masaru K.} and Pauzauskie, {Peter J.}",
booktitle = "Photonic Heat Engines",
}