25 Gb/s Physical Secure Communication Based on Temporal Spreading-Then-Random Phase Encryption

Zhensen Gao, Qiongqiong Wu, Xulin Gao, Qihua Li, Ziyang Ma, Xu Wang, Yuwen Qin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Ensuring high speed physical layer confidential data exchange in classical optical fiber channels is a critical challenge. In this letter, we experimentally demonstrated a physical secure optical communication system based on temporal spreading-then-random phase encryption scheme for secure transmission of 25 Gb/s intensity-modulated signal. Commercial low cost continuous-wave laser is employed as the optical source, and a chirped fiber Bragg grating followed by a phase modulator is utilized as a two-dimensional encryption module. Successful encryption and decryption of 25 Gb/s confidential data have been achieved by optimizing optical hardware parameters. The demonstrated system can combine the advantages of hardware and digital encryption, exhibiting great potential for providing physical layer security in future high-speed secure optical communication systems.

Original languageEnglish
Pages (from-to)1363-1366
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number24
Early online date25 Oct 2021
Publication statusPublished - 15 Dec 2021


  • fibre optical communication system
  • optical encryption
  • Secure optical communication

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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