Heterogeneous access networks with wired/wireless convergence comprise an important trend in the development of access networks because they reduce network investment and operating costs. In this paper, we propose a heterogeneous access network with a coherent passive optical network (PON) and intermediate frequency over fiber (IFoF) within a single wavelength. The coherent PON and IFoF are both DAPSK-OFDM-based and do not involve noise-compensation digital signal processing (DSP), which lowers bandwidth efficiency. DAPSK-OFDM is a differential modulation scheme that eliminates channel and phase noise during the demodulation process. The coherent PON and IFoF with different transmission schemes are combined using polarization division multiplexing (PDM) and a complete heterogeneous network without crosstalk through polarization optimization and maintenance at a transmission distance less than 20 km. The proposed heterogeneous network is experimentally tested, which shows that its performance is similar to that yielded when operating each system independently.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP; Ministry of Science, ICT & Future Planning) (No. 2019R1A2C3007934).
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering