Author(s): Zou, F (Zou, Fang); Zou, L (Zou, Lei); Lai, Y (Lai, Yun); Xie, CJ (Xie, Changjian); Luo, J (Luo, Jie); Milosevic, D (Milosevic, Dusan); Yan, LS (Yan, Lianshan); Pan, W (Pan, Wei); Liu, Y (Liu, Yu); Cao, ZZ (Cao, Zizheng); Koonen, T (Koonen, Ton); Zou, XH (Zou, Xihua)

Source: IEEE JOURNAL OF QUANTUM ELECTRONICS Volume: 57 Issue: 2 Article Number: 3051410 DOI: 10.1109/JQE.2021.3051410 Published: APR 2021

Abstract: Originating from the non-Hermitian quantum mechanics, the parity-time (PT) symmetry has been extensively explored to ensure a stable single-mode oscillation for optoelectronic oscillators (OEOs), while avoiding additional extremely challenging ultrahigh-Q filters. Enabled by the emerging photonics integrated circuit (PIC) technology, we report the tunable PT-symmetric OEO by using an integrated mode-locked laser, as a striking advance to reduce the footprint of OEOs. Stable single-mode oscillating signal at 24.5 GHz has been generated with a phase noise of -108 dBc/Hz @ 10 kHz frequency offset. In particular, a tunable frequency range from 24 to 25 GHz is achieved by manipulating the injection currents into the well-designed on-chip linear laser cavity. This work exhibits a breakthrough in conceptual integrated microwave photonic devices, and also accelerates the real-world applications of fundamental physical theory of PT symmetry to information industry.

Accession Number: WOS:000749547000001

Author Identifiers:

Author Web of Science ResearcherID ORCID Number

Cao, Zizheng 0000-0002-4774-7545

Lai, Yun 0000-0002-0040-9274

ISSN: 0018-9197

eISSN: 1558-1713

Full Text: https://ieeexplore.ieee.org/document/9321367