1 kW narrow-linewidth fiber amplifier for spectral beam combining

Wirth, Christian; Schmidt, O.; Tsybin, I.; Thomas, Sabu; Limpert, Jens; Eberhardt, Ramona; Tünnermann, Andreas

doi:10.1364/assp.2008.wa6

Cited by 4 publications

(2 citation statements)

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“…The reason is that the positional displacement is small compared to the distance between two adjacent emitters' centres, and the small positional displacement is not enough to obviously affect the diffraction process when an individual beam is diffracted by the grating. However, the position of each emitter is associated with the incidence angle of the corresponding beam to the grating, and the incidence angle influences the operating wavelength according to Equation (4). The spectral composition of the combined beam for different positional displacements is clearly shown in Figure 12, indicating that the centre wavelength of each beam slightly shifts due to the positional displacement.…”

Section: Numerical Calculation and Analysismentioning

confidence: 99%

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Influence of laser array performance on spectrally combined beam

Yang

Zhong

et al. 2016

Journal of Modern Optics

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Incoherent spectral beam combining (SBC) of multiple laser beams is accomplished along the emitters' arraying direction. Considering that the output beams from a laser array (LA) usually have deflection angles, positional displacements and divergence angles even after being collimated, a propagation model of SBC systems based on multilayer dielectric gratings has been built up. On the basis, properties of the spectrally combined beam affected by parameters of the LA have been discussed in detail. Simulation results show that with the increase in the deflection angle, both the power and the beam quality of the combined beam degrade dramatically. The positional displacement has little impact on the intensity distribution and the beam quality of combined beam but change the wavelength composition of the combined beam. The divergence angle strongly affects the intensity distribution and the beam quality of the combined beam. Additionally, the effect of the deflection angle on the output beam quality is more obvious and may shift the beam spot when comparing with that of the divergence angle.

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Section: Numerical Calculation and Analysismentioning

confidence: 99%

“…Fortunately, beam combining offers an effective solution to the laser system design at multi-kW level (3,4). Recently, incoherent spectral beam combining (SBC) has been approved to be a robust and simple technique for achieving high-power laser by combining multiple beams from laser arrays (LAs) into a single beam (5)(6)(7)(8).…”

Section: Introductionmentioning

confidence: 99%