Wuhan National Laboratory for Optoelectronics & School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.
Optics Valley Laboratory, Wuhan 430074, China.
Sci Adv. 2023 May 5;9(18):eadg2538. doi: 10.1126/sciadv.adg2538.
To meet the constant demands of high-capacity telecommunications infrastructure, data rates beyond 1 terabit per second per wavelength channel and optical multiplexing are widely applied. However, these features pose challenges for existing data acquisition and optical performance monitoring techniques because of bandwidth limitation and signal synchronization. We designed an approach that would address these limitations by optically converting the frequency limit to an unlimited time axis and combining this with a chirped coherent detection to innovatively obtain the full-field spectrum. With this approach, we demonstrated a real-time Fourier-domain optical vector oscilloscope, with a 3.4-terahertz bandwidth and a 280-femtosecond temporal resolution over a 520-picosecond record length. In addition to on-off keying and binary phase-shift keying signals (128 gigabits per second), quadrature phase-shift keying wavelength division-multiplexed signals (4 × 160 gigabits per second) are simultaneously observed. Moreover, we successfully demonstrate some high-precision measurements, which indicate them as a promising scientific and industrial tool in high-speed optical communication and ultrafast optical measurement.
为满足大容量电信基础设施的持续需求，已广泛应用数据速率超过每秒每个波长信道 1 太比特和光复用。然而，由于带宽限制和信号同步，这些特性给现有的数据采集和光性能监测技术带来了挑战。我们设计了一种方法，通过将频率限制转换到无限的时间轴，并结合啁啾相干检测，创新性地获得全谱，来解决这些限制。通过这种方法，我们展示了一种实时傅里叶域光矢量示波器，具有 3.4 太赫兹的带宽和 280 飞秒的时间分辨率，记录长度为 520 皮秒。除了开关键控和二进制相移键控信号（128 吉比特每秒）之外，还可以同时观察正交相移键控波分复用信号（4×160 吉比特每秒）。此外，我们成功地进行了一些高精度测量，表明它们是高速光通信和超快光学测量中一种有前途的科学和工业工具。
