Direct-Detection OFDM Transmission Using Four-State Chirp Control With a Dual-Electrode MZM for Dispersion Compensation

IEEE Photonics Journal

Shota Ishimura¹  Kosuke Nishimura¹ 

[1] KDDI Research, Inc., Fujimino-shi, Japan;

关键词: Direct detection;    dispersion compensation;    chirp control;    dual-electrode Mach-Zehnder modulator.;   

DOI  :  10.1109/JPHOT.2018.2856523

来源: DOAJ

【 摘 要 】

We discuss a four-state chirp-control scheme using a dual-electrode Mach-Zehnder modulator to compensate dispersion-induced RF power fading when employing direct-detection-based orthogonal-frequency-division-multiplexed (OFDM) signals. We numerically confirm that in contrast to the previously proposed parallel transmitter employing an intensity/phase modulator, four-state chirp control can flatten frequency response and make the total performance uniform even though its structure is significantly simplified. To demonstrate this, we successfully transmitted a 20-GHz OFDM signal over an 80-km single-mode fiber using four-state chirp control, achieving a line bit rate of 78.41 Gb/s even in the presence of chromatic dispersion.

【 授权许可】

Unknown