End-fire silicon optical phased array with half-wavelength spacing
APL Photonics, ISSN: 2378-0967, Vol: 3, Issue: 1
2018
- 68Citations
- 75Captures
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Article Description
We demonstrate an optical phased array with emitting elements spaced at half the operational wavelength. The device is a one-dimensional array fabricated on an integrated silicon platform for operation at a wavelength of 1.55 μm. Light is emitted end-fire from the chip edge where the waveguides are terminated. The innovative design and high confinement afforded by the silicon waveguides enables λ/2 spacing (775-nm pitch) at the output thereby eliminating grating lobes and maximizing the power in the main lobe. Steering is achieved by inducing a phase shift between the waveguide feeds via integrated thermo-optic heaters. The device forms a beam with a full-width half-maximum angular width of 17°, and we demonstrate beam steering over a 64° range limited only by the element factor.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85051263980&origin=inward; http://dx.doi.org/10.1063/1.5000741; https://pubs.aip.org/app/article/3/1/011301/122995/End-fire-silicon-optical-phased-array-with-half; http://aip.scitation.org/doi/10.1063/1.5000741; https://aip.scitation.org/doi/10.1063/1.5000741
AIP Publishing
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