Short-pulse MOPA fiber laser with kilowatt average power and multi-megawatt peak power, applying advanced XLMA fiber amplifiers

Dinger, R.; Grundmann, Frank-Peter; Hapke, Christian; Kallage, Peter; Rath, Wolfram; Ruppik, Stefan

doi:10.1117/12.2250134

Cited by 14 publications

(4 citation statements)

References 12 publications

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“…Noteworthy achievements include an 82-mJ output for 500-ns pulses and a peak power of 2.4 MW for 4-ns pulses using a 200-μm-core-diameter fiber amplifier [13]. The research [18] obtained a 1500 W, 150 mJ high-energy laser system by the spatial coupling into 600 μm fiber. Another approach involving a 50 μm Yb-doped multimode core and 62.5 μm multimode delivery fiber achieved 500 ns pulse width, 10 mJ pulse energy, and 256 W average power [19].…”

Section: Introductionmentioning

confidence: 99%

15 mJ and high-peak-power nanosecond pulse based on all-fiber MOPA system

Zhang,

Wen,

Liu

et al. 2023

Advanced Lasers, High-Power Lasers, and Applications XIV

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We present the comprehensive elucidation of an exclusively fiber-based nanosecond Master Oscillator Power Amplifier (MOPA) laser system, integrating a 100-μm-core ytterbium-doped fiber within the primary amplification stage and a 300μm-core Quartz Block Head (QBH) delivery configuration. The laser system hinges upon a diode laser seed, yielding a pulse train with pulse duration of 50 ns and repetition rate of 30 kHz. Consequently, the resultant pulse profile exhibits a final full-width at half-maximum (FWHM) of 8.8 ns, concomitantly achieving a pinnacle power output exceeding 1.5 MW.The average power output attains a magnitude of 456 W, concomitant with a maximal pulse energy of 15.2 mJ. These findings collectively underscore a noteworthy advancement in both average and peak power outputs, notably within the context of narrow pulse durations and low repetition rate regimes.

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Section: Introductionmentioning

confidence: 99%

15 mJ and high-peak-power nanosecond pulse based on all-fiber MOPA system

Zhang,

Wen,

Liu

et al. 2023

Advanced Lasers, High-Power Lasers, and Applications XIV

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“…Digital Object Identifier 10.1109/JPHOT.2022.3173672 mW [10]. By the means of spatial coupling, the seed light was coupled into 600 µm fiber; and a 1500 W, 150 mJ high-energy laser was obtained [11] In practice, the results as mentioned above were based on the design of spatial coupling in the main amplifier, which required careful alignment; and it could be difficult for the systems to transmit long-term stable and reliable lasers. Later, with the development of fiber combiner component technology [12], [13], the results of high-power pulses with an all-fiber structure were published.…”

Section: Introductionmentioning

confidence: 99%

High-Power Yb-Doped and All Fiber-Based Nanosecond MOPA Laser

et al. 2022

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We report the results obtained by using a newly designed 300-µm-core-diameter Yb-doped fiber with a large cladding absorption of 23 dB/m at 976 nm. An average power of 512 W, a maximum pulse energy of 51.2 mJ laser is realized using the 300-µm-core Yb-doped fiber in the main amplifier with a slope efficiency of 72%. The entire laser system adopts an all-fiber construction with pulse control system. These results extend average power and peak power of nanosecond all fiber-based laser, exceeding to the 500 W and 1 MW regime simultaneously for the first time to the best of our knowledge.

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“…The most straightforward approach is to increase the SBS threshold directly by using fibers with a specially designed structure (e.g. large core-to-cladding area ratio [10][11][12], very short fiber with heavy ion doping [13],…”

Section: Introductionmentioning

confidence: 99%

High-energy pulsed operation of a Yb fibre master oscillator power amplifier with an amplified spontaneous emission light source

Park

Jeong

et al. 2019

Laser Phys. Lett.

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We report high-energy pulsed operation of an amplified spontaneous emission (ASE) light source at 1050 nm based on a Yb-doped fiber master oscillator power amplifier (MOPA). The ASE seed beam with a tailored spectral bandwidth was temporally modulated by an acousto-optic modulator and was amplified in three Yb fiber amplifier stages. The MOPA yielded 320.7 µJ and 415.0 µJ of the pulsed outputs at a 100 kHz repetition rate for the ASE seeds with 1 nm and 2 nm bandwidths, respectively. Investigation of stimulated Brillouin scattering (SBS) in Yb fibers showed that ASE light pulses could offer a higher pulse energy than laser pulses due to the higher SBS threshold. We will discuss the prospects of further power scaling in a fiber ASE light source with a broad bandwidth by overcoming the SBS limitation.

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Short-pulse MOPA fiber laser with kilowatt average power and multi-megawatt peak power, applying advanced XLMA fiber amplifiers

Cited by 14 publications

References 12 publications

15 mJ and high-peak-power nanosecond pulse based on all-fiber MOPA system

15 mJ and high-peak-power nanosecond pulse based on all-fiber MOPA system

High-Power Yb-Doped and All Fiber-Based Nanosecond MOPA Laser

High-energy pulsed operation of a Yb fibre master oscillator power amplifier with an amplified spontaneous emission light source

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