Zobrazeno 1 - 10
of 815
pro vyhledávání: '"Kook, Han"'
Publikováno v:
IEEE Access, Vol 12, Pp 5365-5372 (2024)
During multi-dimensional optical transmission, because of photodetector (PD) operation as a square law detector, signals get distorted when they are modulated on polarization and phase due to interdimensional interference (IDI) by intensity-modulated
Externí odkaz:
https://doaj.org/article/e370306c41744e9f865f94f58c74b20d
Publikováno v:
IEEE Access, Vol 11, Pp 22526-22530 (2023)
A novel concept for single wavelength high spectral-efficient multi-dimensional optical transmission with geometric and probabilistic constellation shaping and bit mapping technique is presented in this study. We propose a simultaneous Hexagonal RF-Q
Externí odkaz:
https://doaj.org/article/6f71d06f570c44e2bd659032044f7e86
Autor:
Luhing Hu, Jaeyong Choi, Sumin Hwangbo, Do-Hoon Kwon, Bongkyun Jang, Seunghyeon Ji, Jae-Hyun Kim, Sang-Kook Han, Jong-Hyun Ahn
Publikováno v:
npj Flexible Electronics, Vol 6, Iss 1, Pp 1-7 (2022)
Abstract A flexible full-color micro-LED display with high mechanical robustness was fabricated by printing quantum dots (QDs) on a blue micro-LED array using standard photolithography. The red and green colors yielded from QDs exhibit a better color
Externí odkaz:
https://doaj.org/article/dea03861a8634b799e5382a2793faa71
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-16 (2022)
Protein Hfq regulates bacterial mRNA translation and stability by interacting with mRNAs and small noncoding RNAs. Here, the authors identify Hfq-interacting RNAs in three strains representing major phylogenetic lineages of Pseudomonas aeruginosa, hi
Externí odkaz:
https://doaj.org/article/d829dbb6db904995a46a0e2285709659
Autor:
Sung-Jin Kim, Sang-Kook Han
Publikováno v:
IEEE Access, Vol 10, Pp 129925-129931 (2022)
In this paper, we analyzed the diversity performance with increased pointing error caused by multiple beam transmissions for spatial diversity based vertical free space optical (FSO) back-haul links. For power-limited FSO systems, the spatial diversi
Externí odkaz:
https://doaj.org/article/992b93faf62b40d88f96d9bcce6da210
Publikováno v:
IEEE Access, Vol 10, Pp 47266-47274 (2022)
We report a multi–dimensional quadrature amplitude modulation with M-ary differential phase shift keying (QAM-MDPSK) modulation for optical access network transmission systems employing a Mach–Zehnder modulator (MZM) and a phase modulator (PM) in
Externí odkaz:
https://doaj.org/article/f224e2edfc664072862191a60b03322f
Autor:
Donggeun Lee, Woo Hyuk Jung, Suho Lee, Eui-Sang Yu, Taikjin Lee, Jae Hun Kim, Hyun Seok Song, Kwan Hyi Lee, Seok Lee, Sang-Kook Han, Myung Chul Choi, Dong June Ahn, Yong-Sang Ryu, Chulki Kim
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
The design of bioelectronic devices that enables accurate detection of biomolecules in ionic solutions at physiologically-relevant concentrations remains a challenge. Here, the authors report a ion-impermeable supported lipid bilayer-assisted field-e
Externí odkaz:
https://doaj.org/article/02e19b0fe18e42f4bdef813808a531eb
Publikováno v:
Sensors, Vol 23, Iss 11, p 5045 (2023)
Free-space optical (FSO) communication has been studied for next-generation network systems. Because an FSO system establishes point-to-point communication links, maintaining alignment among the transceivers is a critical challenge. In addition, atmo
Externí odkaz:
https://doaj.org/article/4f485ca51cd44f379f71cfeaa214bd58
Publikováno v:
IEEE Access, Vol 9, Pp 106451-106458 (2021)
This study proposes an adaptive thresholding optical detection technique using a stochastic approximation (SA) to enhance receiver performance in multi-level pulse amplitude modulation (PAM) based free-space optical (FSO) transmission. When the recei
Externí odkaz:
https://doaj.org/article/dd05eb343a094b79a4a32eaed1b610c8
Publikováno v:
IEEE Access, Vol 9, Pp 119139-119146 (2021)
In optical transmission technique using optical polarization, the change of state of polarization (SOP) and the rotation of SOP (RSOP) during optical transmission has a significant impact on the transmission performance. We propose polarized intensit
Externí odkaz:
https://doaj.org/article/4688ff943d7643c4b918d27b724ec552