Journal: Nanophotonics
Article Title: Subharmonic injection-locked photonic integrated thin-film lithium niobate optoelectronic oscillator
doi: 10.1515/nanoph-2025-0476
Figure Lengend Snippet: Second-order subharmonic injection-locked OEO. (a) The measured optical spectrum. (b) The RF spectrum of the 28.7 GHz signal measured with an RFSA with a frequency span of 600 kHz and a RBW of 2.4 kHz. Inset: the RF spectrum of the second-order subharmonic injection-locked OEO measured with an RFSA at Maxhold mode (blue curve) within 13 min and normal mode (red curve). (c) The measured phase noises of the 28.7 GHz RF signal generated by the free-running OEO (black curve), the second-order subharmonic injection-locked OEO (red curve), and the external injected RF source (Keysight E8257D) (blue curve). (d) The measured locking range as a function of the injection power.
Article Snippet: The comparison of phase noise for the 28.7 GHz injection RF signal – generated by the free-running OEO (black curve), the second-order subharmonic injection-locked OEO (red curve), and the Keysight E8257D (blue curve) – is illustrated in .
Techniques: Injection, Generated