利用光非线性演示高达 64QAM 的可重构光高阶调制格式的产生。

Demonstration of reconfigurable optical generation of higher-order modulation formats up to 64 QAM using optical nonlinearity.

机构信息

Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA.

出版信息

Opt Lett. 2013 Sep 1;38(17):3350-3. doi: 10.1364/OL.38.003350.

DOI:10.1364/OL.38.003350

Abstract

We demonstrate a reconfigurable optical transmitter of higher-order modulation formats including pulse-amplitude-modulation (PAM) signals and quadrature-amplitude-modulation (QAM) signals. We generated six different modulation formats by multiplexing 10 Gbit/s on-off-keying (OOK) signals (10 Gbaud binary phase-shift keying, 4-PAM, 8-PAM quadrature phase-shift keying (QPSK), 16-QAM and 16-star-QAM with error-vector magnitudes (EVMs) of 8.1%, 7.5%, 7.8%, 8.2%, 7.2%, and 6.9%, respectively) and 80 Gbit/s 16-QAM with an EVM of 8.5%, as well as 120 Gbit/s 64-QAM with an EVM of 7.1%, using two or three 40 Gbit/s QPSK signals, respectively. We also successfully transmitted the generated 16-QAM signals through a 100 km transmission line with negligible power penalty.

摘要

我们演示了一种可重构的光发射机，能够实现多种高阶调制格式，包括脉冲幅度调制（PAM）信号和正交幅度调制（QAM）信号。我们通过复用 10Gbit/s 的开关键控（OOK）信号（10Gbaud 二进制相移键控、4-PAM、8-PAM 正交相移键控（QPSK）、16-QAM 和 16-星-QAM，其误差向量幅度（EVM）分别为 8.1%、7.5%、7.8%、8.2%、7.2%和 6.9%）和 80Gbit/s 的 16-QAM（EVM 为 8.5%）以及 120Gbit/s 的 64-QAM（EVM 为 7.1%），分别使用两个或三个 40Gbit/s 的 QPSK 信号，成功生成了六种不同的调制格式。我们还成功地通过 100km 的传输线传输了生成的 16-QAM 信号，功率代价可忽略不计。