Power scalable 30-W mid-infrared fluoride fiber amplifier

A fluoride-fiber-based master oscillator power amplifier (MOPA) for 30-W class continuous-wave (cw) operation at 2.8-μm wavelength has been demonstrated. To overcome the low durability of ZBLAN fibers, various novel technologies for using fluoride glass with a ZBLAN-fiber-based side-pump combiner ha...

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Bibliographic Details
Published in:Optics letters 2019-10, Vol.44 (19), p.4777
Main Authors: Uehara, Hiyori, Konishi, Daisuke, Goya, Kenji, Sahara, Ryo, Murakami, Masanao, Tokita, Shigeki
Format: Article
Language:English
Subjects:
Continuous radiation
Fiber technology
Fluorides
Power amplifiers
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Summary:A fluoride-fiber-based master oscillator power amplifier (MOPA) for 30-W class continuous-wave (cw) operation at 2.8-μm wavelength has been demonstrated. To overcome the low durability of ZBLAN fibers, various novel technologies for using fluoride glass with a ZBLAN-fiber-based side-pump combiner have been adopted in the system. A maximum cw output power of 33 W and stable operation under 23-W output have been demonstrated. We suggest that such fiber MOPA systems will open up advanced fluoride fiber technology for next-generation high-power mid-IR lasers.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.44.004777