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Generation of linearly polarized modes using a digital micromirror device and phase optimization
N.A. Correa-Rojas 1, R.D. Gallego-Ruiz 2, M.I. Álvarez-Castaño 1

1 Faculty of Engineering, Department of Electronics and Telecommunications,
Metropolitan Technological Institute, Medellin Calle 54A 30-01, Colombia;
2 Faculty of Engineering, Department of Electronics and Telecommunications
University of Antioquia, A.A. 1226, Medellin, Colombia

 PDF, 1580 kB

DOI: 10.18287/2412-6179-CO-857

Pages: 30-38.

Full text of article: English language.

Abstract:
Linearly polarized modes were generated from the fundamental LP01 using Lee holograms displayed on a digital micromirror device. The phase in the holograms was optimized using simulated annealing algorithm and complex amplitude correlation to improve the quality of the converted modes. The correlation measurements, and comparisons between numerical and experimental results, show the fidelity of the obtained modes and the effectiveness of the optimization. Furthermore, the optimized holograms can be combined to generate multiple modes spatially addressed with individual control. The results, and the use of a digital micromirror device instead of the most common liquid crystal modulators, make this method suitable for Modal Division Multiplexing systems and compatible with other optical telecommunication techniques like Wavelength and Polarization Division multiplexing, and reconfigurable optical networks.

Keywords:
phase modulation, spatial light modulators, diffractive optics, free-space optical communication, optical communications, modes; buffers, couplers, routers, switches, and multiplexers.

Citation:
Correa-Rojas NA, Gallego-Ruiz RD, Álvarez-Castaño MI. Generation of linearly polarized modes using a digital micromirror device and phase optimization. Computer Optics 2022; 46(1): 30-38. DOI: 10.18287/2412-6179-CO-857.

Acknowledgements:
The work was funded by the Metropolitan Technological Institute (Instituto Tecnológico Metropolitano), grant number P20222.

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