Sensitivity analysis of coherently beam combining system to near-field disturbances

Jan K. Jabczyński; Przemysław Gontar; Lukasz Gorajek; Krzysztof Kopczyński

doi:10.1117/12.2600083

12 September 2021 Sensitivity analysis of coherently beam combining system to near-field disturbances

Jan K. Jabczyński, Przemysław Gontar, Lukasz Gorajek, Krzysztof Kopczyński

Proceedings Volume 11867, Technologies for Optical Countermeasures XVIII and High-Power Lasers: Technology and Systems, Platforms, Effects V; 118670C (2021) https://doi.org/10.1117/12.2600083
Event: SPIE Security + Defence, 2021, Online Only

Abstract

Coherently Beam Combining System is sensitive to occurring in near-field disturbances: tilts, phase, amplitude, depolarization, defocusing and wavefront aberration. The analytical/numerical model for such purposes was developed. The tilts impact is determined mainly by angular diffraction size of emitter, whereas the size of lattice and number of emitters does not influence on result. The defocusing errors of endcaps in CBC combining optics resulting in the Guoy’s piston/phase errors in far-field must be mandatory compensated. Phase disturbance leading to Maréchal formula shows that the lattice architecture and specific beam profile plays second order role. The requirements on tilt and phase compensation do not increase with the complexity of CBC systems (number of emitters), paving the way for designing effective CBC systems with several hundreds of emitters.

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Jan K. Jabczyński, Przemysław Gontar, Lukasz Gorajek, and Krzysztof Kopczyński "Sensitivity analysis of coherently beam combining system to near-field disturbances", Proc. SPIE 11867, Technologies for Optical Countermeasures XVIII and High-Power Lasers: Technology and Systems, Platforms, Effects V, 118670C (12 September 2021); https://doi.org/10.1117/12.2600083

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KEYWORDS

Beam analyzers

Near field

Wavefront aberrations

Diffraction

Near field optics

Numerical analysis

Phase compensation

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