Impact Statement:Light Beam-steering using optical phased array is important for free-space communication and LIDAR systems with high reliability and large-scale integration. The manuscri...Show More
Abstract:
We demonstrate a chip-scale germanium-silicon optical phased array (OPA) fabricated on a CMOS-compatible platform capable of 2D beam steering in the mid-infrared waveleng...Show MoreMetadata
Impact Statement:
Light Beam-steering using optical phased array is important for free-space communication and LIDAR systems with high reliability and large-scale integration. The manuscript reports novel results related to the first experimental demonstration of 2D beam-steering in the MidIR to the benefit of lower sensitivity to turbulence in the atmosphere and high eye-safety optical power. The experimental results indicate steering up to 12° with beam size of 3.08x0.18° using Ge-on-Si photonics platform.
Abstract:
We demonstrate a chip-scale germanium-silicon optical phased array (OPA) fabricated on a CMOS-compatible platform capable of 2D beam steering in the mid-infrared wavelength range. The OPA included a specially designed grating emitter waveguide array with uniform emission intensity along the mm-length waveguide propagation to realize very sharp instantaneous field-of-view (IFOV) and wide beam-steering total-field-of-view (TFOV). The experimental results indicated lateral beam-steering TFOV up to 12.7° by phase-tuning the waveguide array and longitudinal TFOV up to 12° by wavelength tuning. The 3-dB beam divergence is 3.08° × 0.18°. The demonstrated OPA architecture can employ wafer-scale fabrication and integration while supporting sensing and imaging applications in the mid-infrared spectral range.
Published in: IEEE Photonics Journal ( Volume: 11, Issue: 6, December 2019)
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