Time-Division Multiplexed Optical Covert Communication System Based on Gain-Switched Optical Pulses

• DOI: 10.3390/photonics11040376
• Publication Date: 2024-04-17T12:22:44Z
• Authors: Dong Liu; Yongliang Yin; Mingyu Cui; Zhanqi Liu; Huatao Zhu
• Keywords: Time-division multiplexing; Frequency-division multiplexing; Covert

In optical covert communication systems based on gain-switched distributed feedback semiconductor lasers, the trade-off between modulation frequency and spectral imperceptibility limits bit rate of secure channel. To improve system performance in terms covertness, time-division multiplexing is introduced to for first time. The multiplexed channel can work under both multiple-user single-user conditions. demonstrated via a simulation. results show that covertness enhanced by domain. receiver sensitivity condition lower than one.