상세정보
학술지
Experimental demonstration of uncompressed 4K video transmission over directly modulated distributed feedback laser-based terahertz wireless link
- 발행일
- 202304
- 출처
- ETRI Journal, v.45 no.2, pp.193-202
- ISSN
- 1225-6463
- 출판사
- 한국전자통신연구원 (ETRI)
- 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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