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CMOS-Compatible Optical Phased Array Powered by a Monolithically-Integrated Erbium Laser
摘要： An advanced CMOS-compatible 300-mm-wafer silicon-photonics platform is introduced that consists of a silicon layer with eight doping masks, two silicon-nitride layers, three metal and via layers, a dicing trench for smooth edge-coupled facets, and a gain-film trench that enables interaction between the gain material and waveguide layers. The platform was used to demonstrate an electrically-steerable integrated optical phased array powered by an on-chip erbium-doped laser. Lasing with a single-mode output, 30 dB side-mode-suppression ratio, and 40 mW lasing threshold was shown, and one-dimensional beam steering with a 0.85? × 0.20? full-width at half-maximum and 30?/W electrical steering efficiency was demonstrated. This system represents the first demonstration of a rare-earth-doped laser monolithically integrated with an active CMOS-compatible silicon-on-insulator photonics system.
关键词： Silicon photonics,rare-earth-doped lasers,integrated optical phased arrays,photonic integrated circuits
更新于2025-09-19 17:13:59
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Formation of the Feedback Loop for Phase Control of a Fiber Laser Array
摘要： Methods for phasing radiation channels for the coherent combination of linearly polarized fields of narrowband fiber lasers are considered. High efficiency of operation of the internal feedback loop based on interference of peripheral sections of radiation (Gaussian beam tails) of the phased channels is shown. This method is easily implementable. It allows scaling the power of optical phased arrays and does not require heavy optical elements. Equations for calculation of the optical scheme for implementation of the feedback loop are presented along with the experimental results on coherent combination of three beams.
关键词： optical phased arrays,feedback loop,coherent combining,fiber laser
更新于2025-09-19 17:13:59
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Improving the Performance of the Optical Antenna for Integrated LIDAR with Optical Phased Arrays through High Contrast Grating Structure on SOI Substrate
摘要： A novel optical antenna for integrated LIDAR with optical phased arrays is proposed and simulated. A HCG structure is used to achieve extremely efficient emission. The emission efficiency is as high as 93.94% at 1550 nm, which exceeds 50% in a range of wavelength from 1480 nm to 1620 nm. The antenna can achieve a perfect grating lobe suppression with background suppression of 28.4dB when the phase difference between adjacent waveguides is 0. A 16-wire optical phased arrays LIDAR can easily achieve a scan range of ±22.8°×20.2° with a beam width of 2.4°×2.5°, by employing the optical antenna proposed.
关键词： SOI substrate,high contrast grating,optical phased arrays,LIDAR,optical antenna
更新于2025-09-10 09:29:36