2 μm Thulium-Doped Ultrafast All-Fiber Laser with Watts-Level Average Output Power

Jiang, 刘江 Liu; Pu, 王璞 Wang

doi:10.3788/cjl201239.0802004

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2023

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“…Fiber Bragg grating (FBG) is an indispensable component of high-power fiber laser, which could be used as a cavity mirror. Currently, UV laser phase mask method has been demonstrated to fabricate high-power FBGs [1][2][3][4][5]. However, the process of hydrogen-loaded, removal and recoating would not only increase the fabrication time, but also degrade the mechanical strength of the obtained FBG, resulting in lower power of laser output.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of high-power fiber Bragg grating in double-clad fiber by femtosecond laser plane-by-plane technology

Yang

Liao

et al. 2023

Advanced Fiber Laser Conference (AFL2022)

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Two types of FBG were fabricated in the 20/400μm passive double-clad fiber (DCF) without coating (w/o-coating) and with coating (w-coating) by femtosecond laser plane-by-plane technology. The w/o-coating FBG with a central wavelength of 1060.62 nm, a reflectivity greater than 99.5% and a 3dB-bandwidth of 3.52 nm, the w-coating FBG with a central wavelength of 1080.10 nm, a reflectivity greater than 99.9% and a 3dB-bandwidth of 2.87 nm, respectively. To the best of our knowledge, this is the first report of fabricating high quality fiber Bragg grating in 20/400μm DCF using femtosecond laser direct writing method.

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Section: Introductionmentioning

confidence: 99%