Multimode laser beam analyzer instrument using electrically programmable optics

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Marraccini, Philip J.
Riza, Nabeel A.
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Presented is a novel design of a multimode laser beam analyzer using a digital micromirror device (DMD) and an electronically controlled variable focus lens (ECVFL) that serve as the digital and analog agile optics, respectively. The proposed analyzer is a broadband laser characterization instrument that uses the agile optics to smartly direct light to the required point photodetectors to enable beam measurements of minimum beam waist size, minimum waist location, divergence, and the beam propagation parameter M(2). Experimental results successfully demonstrate these measurements for a 500 mW multimode test laser beam with a wavelength of 532 nm. The minimum beam waist, divergence, and M(2) experimental results for the test laser are found to be 257.61 mu m, 2.103 mrad, 1.600 and 326.67 mu m, 2.682 mrad, 2.587 for the vertical and horizontal directions, respectively. These measurements are compared to a traditional scan method and the results of the beam waist are found to be within error tolerance of the demonstrated instrument. (C) 2011 American Institute of Physics.
Multimode laser beam analyzer , Multimode laser beam characterization , Laser aeam analyzer , Laser beam characterization , DMD laser Beam analyzer , DMD laser beam characterization
Marraccini, P. J. and Riza, N. A. (2011) 'Multimode laser beam analyzer instrument using electrically programmable optics', Review of Scientific Instruments, 82, 123107 (6 pp). doi: 10.1063/1.3669535
© 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Rev. Sci. Instrum. 82, 123107 (2011) and may be found at