Journal
OPTICS AND LASER TECHNOLOGY
Volume 149, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2021.107809
Keywords
VCSEL array; Fraunhofer diffraction theory; Beam manipulation; Coherently coupled
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Funding
- China Postdoctoral Science Foundation [62104251, 62174178, 61874145]
- NSFC [4172009]
- NSF Beijing
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An accurate far-field intensity distribution model of coherent VCSEL array based on Fraunhofer diffraction theory is established, and the calculated far-field pattern can be configured by tuning the phase distribution of the array. Configurable beam emissions are achieved in experiments, and the results are in good agreement with the established theoretical model.
An accurate far-field intensity distribution model of coherent VCSEL array is established based on Fraunhofer diffraction theory, of which the calculated far-field pattern can be configured by tuning the phase distribution of the array. In experiment, configurable beam emissions are achieved in two-dimensional coherent square 2 x 2 VCSEL arrays and triangular 3-element VCSEL arrays by engineering the phase distribution of the array through simply constructing the array structure. Single-lobe beam, double-lobe beam, and four-lobe beam are obtained in these arrays. Besides, beam shape manipulation is also realized by adjusting the ratio of horizontal dimension to vertical dimension of the array. The experimental results are in good agreement with the calculated results from the established theoretical model.
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