Parity-time-symmetric system in photonic parameter space for high-quality signal generation

Zheng Li; Lingzhi Li; Jiejun Zhang

doi:10.1117/12.2573677

10 October 2020 Parity-time-symmetric system in photonic parameter space for high-quality signal generation

Zheng Li, Lingzhi Li, Jiejun Zhang

Author Affiliations +

Proceedings Volume 11555, Real-time Photonic Measurements, Data Management, and Processing V; 115550G (2020) https://doi.org/10.1117/12.2573677
Event: SPIE/COS Photonics Asia, 2020, Online Only

Abstract

Conventional parity-time (PT) symmetric systems consist of two physically separated resonators to form one-dimensional spatial potential symmetry, with the gain and loss modes localized in respective resonators. We show that PT-symmetry can be implemented between subspaces in non-spatial parameter spaces, in which the gain and loss modes can perfectly overlay spatially but are distinguishable in the designated parameter space. Such optical parameter spaces can be implemented by optical wavelength, wavevector and polarization, etc. The resultant spatial singularity enables the possibility in implementing PT-symmetric systems with increased structural simplicity, integration density and long-term stability. In this talk, PT-symmetric optoelectronic oscillators (OEOs) are implemented in the parameter space of optical wavelength and wavevector; a PT-symmetric laser is implemented in the parameter space of optical polarization. All systems are shown to operate with stable single-mode oscillation and with low structural complexity. We believe that PTsymmetric system in non-spatial parameter spaces can find great applications in optical instrumentation due to its capability for low phase noise signal generation.

Conference Presentation

Citation Download Citation

Zheng Li, Lingzhi Li, and Jiejun Zhang "Parity-time-symmetric system in photonic parameter space for high-quality signal generation", Proc. SPIE 11555, Real-time Photonic Measurements, Data Management, and Processing V, 115550G (10 October 2020); https://doi.org/10.1117/12.2573677

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