Phase-Only Beam Optimization for GaAs Optical Waveguide Phase Array

Abstract:

Optical waveguide phased arrays have highlighted advantages than other electro-optical material optical arrays in scanning angle, response speed etc. For diffraction fields of uniform waveguide have strong side-lobes, which have influence on scanning performance of phased arrays. So side-lobes compression is one of the main issues for optical waveguide phased array device development. Based on photoelectric effect, the relations of voltage and phase are analysised. Phase-only array beam control using a Genetic Algorithm, an efficiency-optimized scheme, for uniform optical waveguide array with process errors is proposed. Phase distributions are arranged as randomly increasing distributions and random distributions. The results show phase-only optical waveguide arrays control, without the reconstruction of devices, has fine side-lobes compression effects with -9.89[dB] side-lobes intensity ratio. So the performance of scanning beams gets well improved.

• Periodical: Advanced Materials Research (Volume 571)
• Pages: 316-319
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.571.316
• Online since: September 2012
• Authors: Yong Zhang, Jing Jing Xue, Zhen Sen Wu, Yu Shi Zhang
• Keywords: Genetic Algorithm (GA), Optical Phased Array, Optical Waveguide Array, Phase-Only Control, Side-Lobes Compression

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