1. Parity-Time Symmetric Optoelectronic Oscillator Based on an Integrated Mode-Locked Laser
- Author
-
Ton Koonen, Changjian Xie, Yun Lai, Jie Luo, Lianshan Yan, Lei Zou, Yu Liu, Zizheng Cao, Fang Zou, Xihua Zou, Dusan Milosevic, Wei Pan, Eindhoven Hendrik Casimir institute, RF, Integrated Circuits, Electro-Optical Communication, and Center for Wireless Technology Eindhoven
- Subjects
Physics ,business.industry ,Photonic integrated circuit ,Physics::Optics ,02 engineering and technology ,Integrated circuit ,parity-time symmetry ,Condensed Matter Physics ,Laser ,Signal ,Atomic and Molecular Physics, and Optics ,law.invention ,Photonic integrated circuits ,020210 optoelectronics & photonics ,semiconductor mode-locked laser ,law ,Optical cavity ,coupled optoelectronic oscillations ,Phase noise ,0202 electrical engineering, electronic engineering, information engineering ,Frequency offset ,Optoelectronics ,Electrical and Electronic Engineering ,Photonics ,business - 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.
- Published
- 2021