Highly efficient dual-grating 3-channel spectral beam combining of narrow-linewidth monolithic cw Yb-doped fiber amplifiers up to 5.5 kW

Strecker, Maximilian; Plötner, Marco; Stutzki, Fabian; Walbaum, Till; Ehrhardt, Sascha; Benkenstein, Tino; Zeitner, Uwe D.; Thomas, Sabu; Eberhardt, Ramona; Tünnermann, Andreas; Stuhr, U.; Jung, Markus; Ludewigt, K.

doi:10.1117/12.2508674

Cited by 6 publications

(1 citation statement)

References 9 publications

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“…In one version of this method, intracavity combining of laser channels with different wavelengths is performed. Recent laser SBC systems based on fiber active media reach an output power ranging from a few kW [1][2][3] to over 30 kW when 96 channels are combined [4].…”

Section: Introductionmentioning

confidence: 99%

Implementation or Suppression of the Collective Lasing of the Laser Channels at the Intracavity Spectral Beam Combining

Kamynin,

Kashin,

Nikolaev

et al. 2023

Photonics

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The spectral and spatial output parameters of a two-channel, Yb-doped fiber laser operating in the intracavity spectral beam combining mode were investigated. We showed that by using active media with slightly different gain spectra, it is possible to implement either the spectral combining mode of the independent laser channels or the mode of collective lasing of the channels. The difference in the gain spectra of the active media was realized due to the difference in the threshold inverse population in the Yb-doped fibers.

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Section: Introductionmentioning

confidence: 99%

Implementation or Suppression of the Collective Lasing of the Laser Channels at the Intracavity Spectral Beam Combining

Kamynin,

Kashin,

Nikolaev

et al. 2023

Photonics

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Appearance of collective lasing of laser channels at the intracavity spectral beam combining

Kamynin

Kashin

Николаев

et al. 2022

Optics Communications

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3.25 kW all-fiberized and polarization-maintained Yb-doped amplifier with a 20 GHz linewidth and near-diffraction-limited beam quality

et al. 2021

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In this paper, we demonstrate a high-power, narrow-linewidth, polarization-maintaining fiber amplifier with near-diffraction-limited beam quality. By optimizing the phase modulation signal, a nearly top-hat-shaped spectrum was generated for self-pulsing suppressing. That results in doubling the self-pulsing threshold we got from conventional white noise signal phase modulation with the same optical linewidth. Based on an optimized signal and a high power, polarization-maintaining, counter-pumped fiber amplifier, we obtain a 3.25 kW narrow-linewidth linearly polarized laser output with a linewidth of ∼ 20 G H z , the polarization extinction ratio is about 15 dB, and the M 2 is less than 1.22 at the maximum output power. To the best of our knowledge, this is the first demonstration of a narrow-linewidth, linear polarization, all-fiber amplifier with 3.25 kW laser output.

show abstract

Highly efficient dual-grating 3-channel spectral beam combining of narrow-linewidth monolithic cw Yb-doped fiber amplifiers up to 5.5 kW

Cited by 6 publications

References 9 publications

Implementation or Suppression of the Collective Lasing of the Laser Channels at the Intracavity Spectral Beam Combining

Implementation or Suppression of the Collective Lasing of the Laser Channels at the Intracavity Spectral Beam Combining

Appearance of collective lasing of laser channels at the intracavity spectral beam combining

3.25 kW all-fiberized and polarization-maintained Yb-doped amplifier with a 20 GHz linewidth and near-diffraction-limited beam quality

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