China's optical communication technology realizes 1.06Pbit/s ultra-large capacity optical transmission for the first time
Recently, good news came from China's information and communication technology group, and China's optical communication technology has once again made breakthrough progress. The State Key Laboratory of Optical Fiber Communication Technology and Network, National Information Optoelectronics Innovation Center, Fiberhome Communications and Optoelectronics Technology have jointly conducted research on the optical transmission system of 1.06 Pbit/s ultra-large capacity WDM and space division multiplexing in China. The transmission capacity is 10 times the maximum capacity of the commercial single-mode optical fiber transmission system, and the data stored in about 130 1TB hard disks can be transmitted in one second. The experiment uses domestically the most advanced research results in optical transmission system technology, optical device and optical chip technology, and fiber optic cable technology, marking China's research field in the field of "ultra-large capacity, ultra-long-distance, ultra-high-rate" optical communication systems. Towards a new level.
The system equipment generates 375 optical carriers in the C+L band, and realizes 178.18 Gbit/s DFTs-PDM-16QAM signal transmission and reception in the 25 GHz channel based on the silicon optical coherent transceiver chip, which is completed in the single mode 19-core fiber. Optical transmission verification, the total transmission capacity reaches 1.06Pbit/s, and the net spectral efficiency reaches 113bit/s/Hz. After the third-party testing and verification, the “1.06Pbit/s ultra-large capacity single-mode multi-core optical fiber transmission system” realized this time is the first in China and has reached the international advanced level.
At the same time, the core optical chip and optical fiber used in this experiment are independently developed and have completely independent intellectual property rights. The silicon optical coherent transceiver chip is jointly developed by the National Information Optoelectronics Innovation Center, the National Key Laboratory of Optical Fiber Communication Technology and Network, Guangxun Technology and Fiberhome Communications. It integrates optical transmission, modulation, reception, etc. on a silicon chip of less than 30mm2. Nearly 60 active and passive optical components, and can support C + L band simultaneous operation, is currently the most integrated commercial photonic integrated chip in China. This time through the process and technological breakthroughs, the cross-channel crosstalk problem of single-mode nineteen-core fiber is solved. The isolation of adjacent cores is better than -40dB, and the interference and influence between "lane" and "lane" are reduced. lowest.
The system equipment generates 375 optical carriers in the C+L band, and realizes 178.18 Gbit/s DFTs-PDM-16QAM signal transmission and reception in the 25 GHz channel based on the silicon optical coherent transceiver chip, which is completed in the single mode 19-core fiber. Optical transmission verification, the total transmission capacity reaches 1.06Pbit/s, and the net spectral efficiency reaches 113bit/s/Hz. After the third-party testing and verification, the “1.06Pbit/s ultra-large capacity single-mode multi-core optical fiber transmission system” realized this time is the first in China and has reached the international advanced level.
At the same time, the core optical chip and optical fiber used in this experiment are independently developed and have completely independent intellectual property rights. The silicon optical coherent transceiver chip is jointly developed by the National Information Optoelectronics Innovation Center, the National Key Laboratory of Optical Fiber Communication Technology and Network, Guangxun Technology and Fiberhome Communications. It integrates optical transmission, modulation, reception, etc. on a silicon chip of less than 30mm2. Nearly 60 active and passive optical components, and can support C + L band simultaneous operation, is currently the most integrated commercial photonic integrated chip in China. This time through the process and technological breakthroughs, the cross-channel crosstalk problem of single-mode nineteen-core fiber is solved. The isolation of adjacent cores is better than -40dB, and the interference and influence between "lane" and "lane" are reduced. lowest.
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