One millijoule mid-IR nanosecond pulses at ∼2.78 μm in a robust single transverse mode from a coiled 46 μm core low-NA Er:ZBLAN fiber amplifier

被引：0

作者：

Bai, Yu ^{[1
,2
]}

Zhou, Bohan ^{[1
,2
]}

Du, Weizhi ^{[1
,2
]}

Cui, Yifan ^{[1
,2
]}

Galvanauskas, Almantas ^{[1
,2
]}

机构：

[1] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA

[2] Univ Michigan, Gerard Mourou Ctr Ultrafast Opt Sci, Ann Arbor, MI 48109 USA

来源：

OPTICS LETTERS | 2025年 / 50卷 / 04期

关键词：

CURVATURE LOSS; LOSS FORMULA;

D O I：

10.1364/OL.550284

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate high-energy nanosecond pulse amplification at similar to 2.78 mu m in a robust single transverse mode from a coiled large core low-numerical aperture (NA) Er:ZBLAN fiber amplifier. The highest energy achieved is 1.01 mJ from a 46 mu m core Er:ZBLAN fiber, seeded with a preamplifier in a single-mode fiber 30 ns long pulses from a ring-cavity Q-switched Er:ZBLAN fiber laser. Near-diffraction-limited beams with M2 = 1.09 were obtained using coiling-induced high-order mode filtering in a custom-fabricated 46 mu m diameter and similar to 0.064 NA core fiber. This constitutes, to the best of our knowledge, the highest-energy nanosecond duration pulses in a single transverse mode from an Er:ZBLAN fiber laser system to date. (c) 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

引用

页码：1140 / 1143

页数：4