Photonic-Assisted Microwave Harmonic Down-Conversion Based on Four-Wave Mixing in a Silicon Integrated Waveguide Doped With Reverse-Biased P-i-N Junction

• DOI: 10.1109/jlt.2023.3302248
• Publication Date: 2023-08-07T18:14:57Z
• Authors: Kunpeng Zhai; Xinyan Zhang; Wenting Wang; Bei Chen; Ya Jin; Xinhao Du; Yu Liu; Jiabin Cui; Qiankun Li; Heng Zhou; Huashun Wen; Guangming Zhao; Sha Zhu; Ninghua Zhu
• Keywords: Waveguide; Spurious-free dynamic range

We propose and demonstrate a highly efficient photonic-assisted microwave signal harmonic frequency down- conversion using four-wave mixing (FWM) in silicon waveguide with reverse-biased P-i-N junction. The FWM phenomenon occurred the integrated due to doped regions of junction can increase efficiency free carrier removal from region. Correspondingly, is up 12.8 dB bias voltage 30 V. fully packaged grating coupling fiber array wire-bonded printed circuit board (PCB). By simply adjusting low-frequency electrical LO, down converter based on realize accurate tunable ultra-wide operation. This scheme significantly reduce high-frequency demand for LO source. In experiment, RF signals ranging 8 GHz 31 are all converted within 2 by utilizing 5.88.2 signals, signal-to-noise ratios (SNRs) larger than 50 achieved. Moreover, phase noise intermediate (IF) as low −80.12 dBc/Hz at an offset 10 kHz spurious dynamic range (SFDR) 105.5 <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">·</i> Hz <sup xmlns:xlink="http://www.w3.org/1999/xlink">2/3</sup> 3rd-order effect 103.8 4th-order signal. shows that reliable further use modern systems such photonic radar.