Xi'an Optical and Mechanical Institute has made important progress in the research of ultra-high-speed space optical communication technology

Recently, the Xi'an Institute of Optics and Precision Machinery of the Chinese Academy of Sciences has made important progress in the research of ultra-high-speed space optical communication technology. The relevant research results were published on Photonics Research with the title of Terabit FSO communication based on a soliton microcomb as the cover article.

Free space laser communication (FSOC) is a communication method that uses laser beam as carrier to transmit information in space. Compared with microwave communication, FSOC has the advantages of high transmission rate, strong anti-electromagnetic interference performance, good confidentiality, and no spectrum limitation. At the same time, the terminal is small, easy to deploy, and low power consumption. It is an ideal choice to solve the "last mile" problem of information transmission. In emergency communication It has great application value in satellite-ground communication and inter-satellite communication.

The establishment of FSOC system with large capacity and long transmission distance is a research hotspot in the current field. On-chip microcavity soliton optical frequency comb (SMC) has ultra-high repetition rate, and each comb has strictly equal frequency interval, which is an ideal laser source for wavelength division multiplexing FSOC system. Xie Xiaoping, a researcher of Xi'an Institute of Optics and Mechanics, and Wang Wei, a researcher of the Photonic Network Technology Research Office, Zhang Wenfu, a researcher of the State Key Laboratory of Transient Optics and Photonics Technology, and Wang Weiqiang, an associate researcher, worked together to use the emerging microcavity soliton optical frequency comb to replace the traditional semiconductor tunable laser array as a multi-carrier light source, and use 10 Gbit/s differential phase shift keying modulation signal, The parallel data transmission with a total rate of 1.02 Tbps is realized on the free space optical communication link with a distance of 1 km. This work applies the on-chip micro-cavity soliton optical frequency comb as a multi-wavelength light source to the research of free-space optical communication, which is of great significance for improving the capacity of free-space optical communication and solving the volume, weight and power consumption (SWaP) problems of free-space optical communication, and provides a new way for the development of large-capacity and long-distance free-space optical communication in the future.

Xi'an Institute of Optics and Mechanics is committed to the cutting-edge scientific exploration, key technology research and engineering application research in the field of ultra-high-speed laser communication. The achievements of many years of intensive cultivation have been applied in the "new infrastructure" of satellite Internet, the construction of a powerful maritime country, the prevention and control of road traffic safety and other major national needs, and have been widely praised and recognized by all walks of life.

Research progress in ultra-high-speed space optical communication technology of Xi'an Institute of Optics and Mechanics.

Large-scale parallel free-space optical communication system based on microcavity soliton optical frequency comb.

Thesis connection:https://doi.org/10.1364/PRJ.473559

Source: Xi'an Institute of Optics and Precision Machinery