Towards ultimate high-power scaling: Coherent beam combining of fiber lasers

H Fathi, M Närhi, R Gumenyuk - Photonics, 2021‏ - mdpi.com
Fiber laser technology has been demonstrated as a versatile and reliable approach to laser
source manufacturing with a wide range of applicability in various fields ranging from …

Coherent combination of ultrafast fiber amplifiers

M Hanna, F Guichard, Y Zaouter… - Journal of Physics B …, 2016‏ - iopscience.iop.org
We review recent progress in coherent combining of femtosecond pulses amplified in optical
fibers as a way to scale the peak and average power of ultrafast sources. Different methods …

530 W, 1.3 mJ, four-channel coherently combined femtosecond fiber chirped-pulse amplification system

A Klenke, S Breitkopf, M Kienel, T Gottschall, T Eidam… - Optics letters, 2013‏ - opg.optica.org
We report on a femtosecond fiber laser system comprising four coherently combined large-
pitch fibers as the main amplifier. With this system, a pulse energy of 1.3 mJ and a peak …

22 GW peak-power fiber chirped-pulse-amplification system

A Klenke, S Hädrich, T Eidam, J Rothhardt, M Kienel… - Optics Letters, 2014‏ - opg.optica.org
In this Letter, we report on a femtosecond fiber chirped-pulse-amplification system based on
the coherent combination of the output of four ytterbium-doped large-pitch fibers. Each …

Coherent combining efficiency in tiled and filled aperture approaches

VE Leshchenko - Optics Express, 2015‏ - opg.optica.org
Different approaches to qualify coherent beam combining performance in tiled and filled
aperture combining experiments are discussed. The dependence of the combining …

Analysis of passively combined divided-pulse amplification as an energy-scaling concept

M Kienel, A Klenke, T Eidam, M Baumgartl… - Optics express, 2013‏ - opg.optica.org
The energy scaling of ultrashort-pulse systems employing simultaneously the techniques of
chirped-pulse amplification and passively combined divided-pulse amplification is analyzed …

Two-dimensional combination of eight ultrashort pulsed beams using a diffractive optic pair

T Zhou, Q Du, T Sano, R Wilcox, W Leemans - Optics letters, 2018‏ - opg.optica.org
We demonstrate, to the best of our knowledge, the first two-dimensional diffractive beam
combination for ultrashort pulses—a highly scalable technique capable of using a diffractive …

Femtosecond pulse spectral synthesis in coherently-spectrally combined multi-channel fiber chirped pulse amplifiers

W Chang, T Zhou, LA Siiman, A Galvanauskas - Optics express, 2013‏ - opg.optica.org
We demonstrate coherent spectral beam combining and femtosecond pulse spectral
synthesis using three parallel fiber chirped pulse amplifiers, each amplifying different …

Performance scaling of ultrafast laser systems by coherent addition of femtosecond pulses

J Limpert, A Klenke, M Kienel… - IEEE Journal of …, 2014‏ - ieeexplore.ieee.org
In the last decades, ultrafast lasers and amplifiers have achieved an extraordinary power
increase and have enabled a plethora of scientific, medical or industrial applications …

Machine learning pattern recognition algorithm with applications to coherent laser combination

D Wang, Q Du, T Zhou, A Gilardi… - IEEE Journal of …, 2022‏ - ieeexplore.ieee.org
We analyze a new kind of machine learning algorithm designed to feedback stabilize
coherently combined lasers. This algorithm learns differential, rather than absolute, values of …