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학술지 Experimental demonstration of uncompressed 4K video transmission over directly modulated distributed feedback laser-based terahertz wireless link
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저자
김언상, 문상록, 성민규, 이준기, 조승현
발행일
202304
출처
ETRI Journal, v.45 no.2, pp.193-202
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.2021-0329
협약과제
21ZH1100, 연결의 한계를 극복하는 초연결 입체통신 기술 연구, 박승근
초록
We demonstrate the transmission of uncompressed 4K videos over the photonics-based terahertz (THz) wireless link using a directly modulated distributed feedback laser diode (DFB-LD). For optical heterodyne mixing and data modulation, a DFB-LD was employed and directly modulated with a 5.94-Gb/s non-return-to-zero signal, which is related to a 6G-serial digital interface standard to support ultra-high-definition video resolution. We derived the optimal frequency of the THz carrier by varying the wavelength difference between DFB-LD output and Tunable LD output in the THz signal transmitter to obtain the best transmission performances of the uncompressed 4K video signals. Furthermore, we exploited the negative laser-to-filter detuning for the adiabatic chirp management of the DFB-LD by the intentional discrepancy between the center wavelength of the optical band-pass filter and the output wavelength of the DFB-LD. With the help of the abovementioned methods, we successfully transmitted uncompressed 4K video signals over the 2.3-m wireless transmission distance without black frames induced by time synchronization error.
KSP 제안 키워드
4K video, Band pass Filter(BPF), Center wavelength, Chirp management, Data modulation, Directly modulated, Distributed feedback laser diode, Distributed feedback lasers(DFBs), High definition video, Laser diode(LD), Optical bandpass filter(OBF)
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