Low-Phase-Noise Ultra-Wide Arbitrary Waveforms Generation Using a Wideband Injection-Locked Optoelectronic Oscillator

• DOI: 10.1109/jlt.2024.3371669
• Publication Date: 2024-02-29T18:56:45Z
• Authors: Weifeng Zhang; Yaming Liu; Bin Wang
• Keywords: Injection locking; Wideband

We propose and demonstrate a photonic approach to generating low-phase-noise ultra-wide arbitrary waveforms based on wideband injection-locked optoelectronic oscillator (OEO). A seed microwave signal from an external source is injected into the OEO loop. When period of equal round-trip time loop, injection locking works continuous-wave signal, which center frequency bandwidth are identical that generated by OEO. Thanks long fiber phase noise highly improved. To increase photonic-assisted multiplication leveraged, resulted. By tuning in terms frequency, bandwidth, pattern, also tuned correspondingly. An experimental demonstration performed high-speed dual-polarization dual-drive Mach-Zehnder modulator (DP-DDMZM) incorporated. The upper X-polarized DDMZM used realize loop; lower Y-polarized employed for multiplication. linearly chirped with 3 GHz injected, same generated, measured be -124 dBc/Hz@10 kHz, more than 20 dB improvement compared stability Allan deviation 3.72 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">−12</sup> @1s, almost as signal. With use multiplication, frequency-quadrupled broad 12 generated. fully experimentally demonstrated. In particular, controlling loop gain, pulses different duty cycles Our proposed combines distinct advantages generation low electronic term tuning, takes big step forward practical application.