Tunable Distributed Feedback Laser Based Frequency Hopping in Terahertz Communications
- Resource Type
- Conference
- Authors
- Nallappan, Kathirvel; Skorobogatiy, Maksim
- Source
- 2023 100th ARFTG Microwave Measurement Conference (ARFTG) ARFTG Microwave Measurement Conference (ARFTG), 2023 100th. :1-4 Jan, 2023
- Subject
- Components, Circuits, Devices and Systems
Fields, Waves and Electromagnetics
Signal Processing and Analysis
Wireless communication
Time-frequency analysis
Bit error rate
Measurement uncertainty
Spread spectrum communication
Distributed feedback devices
Laser feedback
Terahertz communications
frequency hopping
photonics
distributed feedback laser
- Language
Terahertz (THz) spectrum (100 GHz-10 THz) is considered the next frontier in the design of high-speed wireless communication systems. While the high-power THz sources have commercially become available, it increases the possibility of developing THz jammers to disrupt the THz communication link. In this work, we present the photonics-based THz communication system and demonstrate the frequency hopping spread spectrum (FHSS) technique which acts against the single/multi-tone jamming attack in the frequency window of 110 GHz-170 GHz. We characterized the system and demonstrated the THz FHSS technique in a real-time communication system by transmitting a 6 Gbps NRZ signal in wireless link within the link distance of 1.75 m. We experimentally found that the measured bit error rate in the THz FHSS system is the time average of the measured BER for individual carrier frequencies within the hopping frequency window. By combining with the forward error correction codes and by using the tunable filter in the receiver, we believe that the proposed technique will offer a novel and compact solution against the single/multi-tone jammer for high-bit rate THz communications.