Four-beamlets laser array and its propagation |
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Authors: | Yangjian Cai Qiang Lin |
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Affiliation: | Department of Physics, Institute of Optics & State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Yu Quan Campus, Hangzhou 310027, China |
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Abstract: | A new type of laser array named four-beamlets laser array is proposed. Based on the diffraction integrals, analytical propagation formulae for the four-beamlets laser array passing through paraxial aligned and misaligned optical systems are derived, respectively. The four-beamlets laser array can also be expressed as a superposition of a series of Hermite Gaussian modes by using polynomial expansion. As a numerical example, the propagation properties of a four-beamlets laser array in free space are illustrated graphically. The fractional Fourier transform of the four-beamlets laser array is also studied. Our model provides a convenient way to describe laser array with four-beamlets. |
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Keywords: | Four-beamlets laser array Paraxial optical system Propagation |
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