Sakin, A.O.Akcay, B.Songur, A.C.Unlu, M.2024-07-212024-07-21202497815106730070277-786Xhttps://doi.org/10.1117/12.3022220https://hdl.handle.net/20.500.11851/11635The Society of Photo-Optical Instrumentation Engineers (SPIE)Nanophotonics X 2024 -- 7 April 2024 through 12 April 2024 -- 200395Integrated optical phased arrays (OPAs) are important for various applications such as LIDAR, microscopy, wireless communication, and holography. Traditional one-dimensional N-element OPAs with individual phase shifters for varied steering angles often have emitter spacings that exceed half a wavelength, leading to grating lobes. Moreover, using true-time-delay lines with varied numbers of periods for different delays may cause amplitude inconsistencies and further side lobe elevation. The proposed partially apodised (PA) one-dimensional grating waveguide design controls amplitude while conserving the time delay for targeted steering angles, using distributions as Uniform to minimize grating and side lobes. We fabricated a four-element array with insertion losses of -3 dB for the PA version across the 1530-1580 nm wavelength band. © 2024 SPIE.eninfo:eu-repo/semantics/closedAccessapodizationGrating lobesoptical phased array antennassilicon-on-insulatortrue-time-delay lineAntenna phased arraysOptical communicationOptical radarSilicon on insulator technologyTime delayWaveguidesAmplitude distributionsApodizationsGrating lobe suppressionGrating lobesOptical phased arraysOptical phased-array antennasSide lobesSilicon on insulatorSteering anglesTrue time delay lineTiming circuitsConference Object2-s2.0-8519716374410.1117/12.3022220