An Ultra-Compact, Narrow-Bandwidth, and High-Density Channel Photonic Integrated Channelizer Based on Serial Arrayed Waveguide Grating Architecture
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Gambini, Fabrizio, Renan Moreira, David Robles, Antonia Gambacorta, and Mark Stephen. “An Ultra-Compact, Narrow-Bandwidth, and High-Density Channel Photonic Integrated Channelizer Based on Serial Arrayed Waveguide Grating Architecture.” Journal of Lightwave Technology, 2024, 1–9. https://doi.org/10.1109/JLT.2024.3349932.
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Public Domain Mark 1.0 Universal
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Abstract
An ultra-compact, narrow-bandwidth, and high-density photonic integrated channelizer has been developed on a silicon nitride platform and demonstrated for parallel processing of wide band hyperspectral microwave spectra. This device is based on an updated generation of arrayed waveguide gratings (AWG) named serial-AWG (SAWG). The design consists of 33 tunable optical delay lines and 10 output channels. Fabrication inaccuracies are compensated by the use of metal heaters to obtain narrow bandwidth and channel separation, and high side lobe suppression. Our experimental results demonstrate ten 2.6 GHz-bandwidth channels, separated by 3.9 GHz and with 20 dB of side-lobes suppression.