Zobrazeno 1 - 10
of 107
pro vyhledávání: '"Hyuk Kee Sung"'
Publikováno v:
Photonics, Vol 11, Iss 2, p 143 (2024)
Multi-channel radio frequency (RF) signal generation, facilitated by photonic technology, offers significant potential for generating coherent signals with a high frequency and low phase noise, providing multifunctional capabilities across diverse pl
Externí odkaz:
https://doaj.org/article/fdba9ee821f64cd486fa21c57394ec35
Publikováno v:
Journal of Electromagnetic Engineering and Science, Vol 22, Iss 3, Pp 395-397 (2022)
We theoretically evaluate the performance of spurious-tone suppression of a multi-loop optoelectronic oscillators (MOEO) based on closed-loop analysis. Spurious tones are unwanted oscillation signals due to the cavity effect of long-length optical fi
Externí odkaz:
https://doaj.org/article/517dabdcbcd643a2b76854a46ee8fcab
Publikováno v:
Photonics, Vol 10, Iss 5, p 498 (2023)
Light detection and ranging (LiDAR) and optical wireless communication (OWC) are in high demand and rapidly developing owing to the explosive growth of smart systems that require automotive and mobile devices. Optical phased arrays (OPA) have become
Externí odkaz:
https://doaj.org/article/f819dabfd3d249019bd84806cd01d1da
Autor:
Anh-Hang Nguyen, Hyuk-Kee Sung
Publikováno v:
Photonics, Vol 9, Iss 11, p 868 (2022)
Relative intensity noise (RIN) is an important factor that determines the performance of optical phased arrays (OPA) that are configured using semiconductor lasers as light emission sources. This study proposes a method of improving the optical signa
Externí odkaz:
https://doaj.org/article/9413fd2f0dc24723b77b60d1021e098b
Publikováno v:
Photonics, Vol 9, Iss 5, p 339 (2022)
In this study, the oscillation signal stabilization and spurious tone suppression of a directly modulated optoelectronic oscillator (DM-OEO) are simultaneously achieved by modulating a laser with a low-frequency radio frequency (RF) signal. The laser
Externí odkaz:
https://doaj.org/article/5ec5637596f24c2c908f6e27eb4c6321
Publikováno v:
Photonics, Vol 8, Iss 11, p 469 (2021)
The high security of optical phased array (OPA) signals is an important requirement for OPA-based optical wireless communication (OWC). We propose a method for improving the security of OPA-based OWC systems using optically injection-locked (OIL) sem
Externí odkaz:
https://doaj.org/article/e7b613295fe24e3fbece5c2829f5d4bc
Publikováno v:
Photonics, Vol 8, Iss 4, p 130 (2021)
The performance of optical M-level (multi-level) amplitude shift keying (ASK) modulation is improved by directly using modulated optically injection-locked (OIL) semiconductor lasers. The direct modulation performance of free-running and OIL semicond
Externí odkaz:
https://doaj.org/article/f37b5dd7db3e4d33b154a1ca9b915d3d
Publikováno v:
Photonics, Vol 7, Iss 1, p 20 (2020)
The side-lobe level (SLL) in optical phased array (OPA) systems should be reduced to ensure their high performance. We investigate theoretically the performance of an OPA based on optically injection-locked (OIL) semiconductor lasers. The phase and a
Externí odkaz:
https://doaj.org/article/23a6fa09939e4cae8db5ac61cef89abf
Publikováno v:
JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE. 20:135-140
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6945865f093351166137ce91c573f741
https://doi.org/10.5573/jsts.2020.20.2.135
https://doi.org/10.5573/jsts.2020.20.2.135
Publikováno v:
Sensors, Vol 18, Iss 9, p 2831 (2018)
Recently, many automobiles adopt radar sensors to support advanced driver assistance system (ADAS) functions. As the number of vehicles with radar systems increases the probability of radar signal interference and the accompanying ghost target proble
Externí odkaz:
https://doaj.org/article/1c6370a4fbaf482e884495d3a6694159