Silicon-Based Optical Phased Array Using Electro-Optic [Formula Omitted]-[Formula Omitted]-[Formula Omitted] Phase Shifters
We present a [Formula Omitted] silicon optical phased array using electro-optic phase shifters to attain high-speed operation with low power consumption. The phase shifters are constructed using a [Formula Omitted]-[Formula Omitted]-[Formula Omitted] junction structure with the [Formula Omitted]- an...
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Veröffentlicht in: | IEEE photonics technology letters 2019-11, Vol.31 (21), p.1685 |
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Hauptverfasser: | , , , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | We present a [Formula Omitted] silicon optical phased array using electro-optic phase shifters to attain high-speed operation with low power consumption. The phase shifters are constructed using a [Formula Omitted]-[Formula Omitted]-[Formula Omitted] junction structure with the [Formula Omitted]- and [Formula Omitted]-doped regions formed on both sides of the [Formula Omitted]-region. The [Formula Omitted]-region width of the phase shifter is optimized considering the power consumption for phase-tuning and the propagation loss in the phase shifter. The fabricated [Formula Omitted]-[Formula Omitted]-[Formula Omitted] phase shifter exhibits a fast operating speed of 20 MHz and a low phase-tuning power of 1.7 mW/[Formula Omitted]. From a 1-D optical phased array integrated with 2-[Formula Omitted]-pitch grating radiators, a wide beam-steering range of 45° is attained along the transversal direction at a [Formula Omitted] wavelength. Average power consumption for the beam-forming operation of the [Formula Omitted] OPA is measured to be 39.6 mW and the average transition time to steer the beam is 24 ns. |
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ISSN: | 1041-1135 1941-0174 |
DOI: | 10.1109/LPT.2019.2939550 |