3.2 kW, 0.22 nm narrow-linewidth MOPA configuration fiber laser with a homemade polarization-maintaining Yb-doped fiber

Liao, Shibiao; Luo, Tao; Xiao, Runheng; Cheng, Jue; Chen, Shu; Zhang, Zhilun; Zhou, Yifeng; Xing, Yingbin; Li, Haiqing; Peng, Jinggang; Dai, Nengli; Li, Jinyan

doi:10.3389/fphy.2023.1134745

Cited by 4 publications

(2 citation statements)

References 48 publications

(60 reference statements)

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“…The large-mode panda-pattern 25/400 μm PMTDF was manufactured by modified chemical vapor deposition (MCVD) method combined with solution doping technology. Mainly, there were five steps in fabricating the Tm-doped aluminosilicate core rods [6][7] : (1) barrier layer and soot layer deposition, (2) rare-earth solution doping, (3) thermal drying, (4) ventilated dehydration, and (5) sintering and collapse. The details of the fabrication process have been mentioned in many literatures, and will not be repeated here.…”

Section: Perform and Fiber Fabrication Fontsmentioning

confidence: 99%

160W narrow-linewidth fiber laser with a homemade polarization-maintaining Tm-doped fiber

Xiao,

Liao,

Luo

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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High-power narrow-linewidth linearly-polarized Tm-doped fiber lasers operating at 2.0μm have attracted extensive interest in both scientific and industrial fields such as free space communication, remote laser sensing, coherent Doppler lidar wind detection, and gravitational wave detection. In this work, an output power of 160 W narrow-linewidth linearly polarized fiber laser operating at 2007.6 nm was realized by employing a homemade polarization-maintaining Thuliumdoped fiber (PMTDF), corresponding to a slope efficiency of 45% and a 3 dB linewidth of 73 pm. The PMTDF was manufactured by modified chemical vapor deposition (MCVD) method combined with solution doping technology, with core and cladding sizes of 25 µm and 400 µm, respectively. The numerical aperture (NA) of the PMTDF is 0.1 and the cladding absorption is 4 dB/m at 793 nm. During the power scaling, the polarization extinction ratio (PER) maintained higher than 16.5 dB, indicating an excellent polarization maintaining performance of the manufactured fiber. The stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS) effects were well-suppressed. This work could provide a good reference for the further power scaling of narrow-linewidth linearly polarized fiber lasers operating at 2.0 μm.

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Section: Perform and Fiber Fabrication Fontsmentioning

confidence: 99%

160W narrow-linewidth fiber laser with a homemade polarization-maintaining Tm-doped fiber

Xiao,

Liao,

Luo

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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show abstract

“…The development of high-power pump diode stack, the invention of cladding pumping, and the use of large mode area fiber (LMAF) were critical to achieve kW average power output with nearly single mode beam quality [1]. On top of these, the use of fiber master oscillator power amplifier (MOPA) configuration and polarization maintaining fiber enables laser sources with narrow linewidth and polarization maintaining output [2], thus forming a very high quality laser (in power, beam quality, linewidth, and polarization). Most efforts to date have concentrated on 1 µm wavelength.…”

Section: Introductionmentioning

confidence: 99%

Toward a holmium doped multimode fiber amplifier with high quality focused output using wavefront-shaping

Nguyen,

Oermann,

Stepanov

et al. 2024

Fiber Lasers XXI: Technology and Systems

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Lasers and amplifiers at 2.1 µm window are of great interest for applications that require high atmospheric transmission. To date, fiber lasers and amplifiers operating at this wavelength are based on single-mode holmium doped fibers (HDF) so that a high-quality output beam can be obtained. However, as can be referred from the case of ytterbium doped fiber power amplifier, limiting nonlinear and thermal effects such as stimulated Brillouin scattering (SBS) and transverse mode instability (TMI) will become obstacles in scaling single-mode holmium doped fiber amplifiers into the multi-kW power regime. The use of multimode HDF can help to mitigate the SBS and TMI effects, facilitating future power scaling of HDF amplifiers (HDFA). Here we propose and experimentally demonstrate a multimode HDF amplifier where the typical speckle pattern output is shaped into a quality focus by wavefront-shaping the amplifier's input seed.

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4.6 kW linearly polarized and narrow-linewidth monolithic fiber amplifier based on a fiber oscillator laser seed

Liao,

Luo,

Xiao

et al. 2023

Opt. Lett.

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In this work, a record output power of 4.6 kW linearly polarized and narrow-linewidth fiber amplifier based on an optimized fiber oscillator laser (FOL) seed was realized by employing a homemade polarization-maintaining Yb-doped fiber (PMYDF), corresponding to a slope efficiency of 79.5% and a 3 dB linewidth of 0.3452 nm. Through an effective strategy relying on decreasing the transmission fiber length from 200 m to 120 m and adding a chirped and tilted fiber Bragg grating (CTFBG), the stimulated Raman scattering (SRS) effects were well-suppressed. By applying the forward combiner with the interconnection between the pump arms into the MOPA system, the MI threshold is increased by more than 560 W and the slope efficiency of the upgraded MOPA system is boosted by 5%. During the experimental process of power amplification, the polarization extinction ratio (PER) remains higher than 15 dB, and a near-diffraction-limited output beam at the laser power of 2980 W was measured with the M2x = 1.314 and M2y = 1.311.

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3.2 kW, 0.22 nm narrow-linewidth MOPA configuration fiber laser with a homemade polarization-maintaining Yb-doped fiber

Cited by 4 publications

References 48 publications

160W narrow-linewidth fiber laser with a homemade polarization-maintaining Tm-doped fiber

160W narrow-linewidth fiber laser with a homemade polarization-maintaining Tm-doped fiber

Toward a holmium doped multimode fiber amplifier with high quality focused output using wavefront-shaping

4.6 kW linearly polarized and narrow-linewidth monolithic fiber amplifier based on a fiber oscillator laser seed

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