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Zou, Jinhai; Feng, Chunna; Lan, Lan; Wang, Hang; Ruan, Qiujun; Bu, Yikun; Luo, Zhengqian
Journal of lightwave technology, 01/2024, Letnik: 42, Številka: 1Journal Article
As deep-red semiconductor lasers are still in development, high-power deep-red lasers have traditionally relied on excimer or dye lasers, or nonlinear frequency conversion of near-infrared lasers, precluding efficient, compact, and affordable laser systems. Herein, the first compact watt-level all-fiber CW Pr<inline-formula><tex-math notation="LaTeX">^{3+}</tex-math></inline-formula>-doped laser operating in the deep-red waveband was developed to navigate the challenge. The all-fiber laser consists of a double-clad Pr<inline-formula><tex-math notation="LaTeX">^{3+}</tex-math></inline-formula>-doped fluoride fiber, two homemade visible fiber dichroic mirrors with a damaged intensity of <inline-formula><tex-math notation="LaTeX">\gt </tex-math></inline-formula>15 MW/cm<inline-formula><tex-math notation="LaTeX">^{2}</tex-math></inline-formula>, and a 443-nm high-power pump source with a multimode fiber-pigtail output. We exhaustively investigated the influences of the gain fiber length and the reflectivity of output mirrors on the deep-red laser performance by experiments and simulations. A maximum average power of 4.1 W at 717 nm was directly obtained under a pump power of 20.2 W, which is more than five times higher than previously reported. The laser slope efficiency is as high as 22.2%, and its power fluctuation is less than 0.93%. Such a compact high-power all-fiber deep-red laser holds promise for applications in biophotonics, biomedicine, and UV laser generation.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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