Experimental demonstration of 60 Gb/s optical OFDM transmissions at 1550 nm over 100 m OM1 MMF IMDD system with central launching

Abstract

Record-high 60 Gb/s optical orthogonal frequency division multiplexing (OFDM) transmissions over intensity modulation and direct-detection (IMDD)-based 100 m optical mode (OM1) multi-mode fiber (MMF) links are experimentally demonstrated, utilizing 10 GHz electro-absorption modulated laser intensity modulators at a single 1550 nm wavelength. Adaptive bit loading and a simple central launching scheme of the proposed scheme show an effective way for combating the channel fading and simplifying the system structure. It shows good potential in short reach data center interconnections.

W-band radio-over-fiber transmission system with delta-sigma modulation and direct detection

“…At the receiver side, we can simply use an envelope detector (ED) to replace the function of a coherent detector, which usually includes expensive high-speed mixers and MMW local oscillators (LOs). An easy-to-implement intensity modulation direct detection (IM/DD) scheme can not only reduce the system cost, but also avoid the frequency-drift issue caused by the linewidth of lasers [23][24][25][26] . It is worth noting that high-order modulation formats have long been used to increase system capacity.…”