Beijing University of Posts and Telecommunications

Huawei Technologies Co., Limited

Jintong Lin

Yan Li

Jian Wu

Hongxiang Guo

Xiaobin Hong

Wei Li

Hui Wang

Bo Yuan

Xin Liu

Yue Liu

Kun Xu

Jifang Qiu

Yong Zuo

An apparatus and a method for monitoring in-band OSNR (Optical Signal-to-Noise Ratio) which monitors the in-band OSNR by using two parallel Mach-Zehnder-interferometers with different optical time delays are disclosed. The apparatus and method can be resistant to chromatic dispersion, polarization mode dispersion and polarized noise, can measure the coherence characteristics of the signal without removing the noise, and can be manufactured into a semiconductor integrated device and be applied in the future high-speed optical network.

Apparatus and method for monitoring in-band OSNR

The present invention provides an optical communication method, comprising: performing modulation on the obtained bit stream data to generate modulated signals; performing differential encoding on the modulated signals to generate differentially encoded signals; converting the differentially encoded signals into electrical signals; and mapping the electrical signals onto optical carriers to generate optical signals for transmission. With the present invention, it is possible to enhance the system's capability of resisting inter-carrier interference without decreasing spectrum efficiency, hence improving the tolerance of existing optical communication systems towards laser linewidth, fast-changing PMD, optical fiber nonlinearity, inter-channel interference and other damages, greatly enhancing system performances.

Multi-carrrier optical communication method and system based on DAPSK

Growing community of inventors

Beijing, China

Jintong Lin