Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Kwang Ryong Oh"'
Autor:
Hyundong Kim, Hyeon-Hye Yu, Kwang-Ryong Oh, Ji-Won Lee, Jinhyeok Ryu, In-Goo Lee, Chil-Min Kim, Chang-Hwan Yi, Sunjae Gwak
Publikováno v:
Optics express. 28(13)
The lowest threshold lasing mode in a rounded D-shape microcavity is theoretically analyzed and experimentally demonstrated. To identify the lowest threshold lasing mode, we investigate threshold conditions of different periodic orbits by considering
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::414687e928921d551dfd035fb9f275ff
https://pubmed.ncbi.nlm.nih.gov/32672218
https://pubmed.ncbi.nlm.nih.gov/32672218
Autor:
Jinhyeok Ryu, Chang-Hwan Yi, Ji-Won Lee, Kwang-Ryong Oh, In-Goo Lee, Sunjae Gwak, Chil-Min Kim
Publikováno v:
Optics letters. 45(13)
We study a lasing of mode groups in a fully chaotic rounded D-shape InGaAsP semiconductor microcavity laser when an electrode is smaller than a cavity (inward gap). Although there are numerous unstable periodic orbits supporting resonances, a mode gr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61396a7dbe5f5c9c43cd39618c7878d5
https://pubmed.ncbi.nlm.nih.gov/32630960
https://pubmed.ncbi.nlm.nih.gov/32630960
Publikováno v:
Optics express. 26(26)
We propose a deformed microcavity laser, where a high-Q mode group emits unidirectionally. The cavity comprises three circular arcs and one linear section. To minimize diffraction effects from the boundary, three circular arcs and one linear section
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33b8d39bb0d304a00aaddcc636da526e
https://pubmed.ncbi.nlm.nih.gov/30650903
https://pubmed.ncbi.nlm.nih.gov/30650903
Autor:
Chang-Hwan Yi, Ji-Won Lee, Ji-Hwan Kim, Kwang-Ryong Oh, Chil-Min Kim, Hyeon-Hye Yu, In-Goo Lee
Publikováno v:
Optics letters. 43(24)
Emission characteristics of an oval-shaped microcavity laser are studied. In experiments, modes localized on periodic orbits emit unidirectionally with a narrow in-plane divergence angle of about 12 deg. The origin of high directionality is elucidate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88708358539190c92a1c38b6114dc731
https://pubmed.ncbi.nlm.nih.gov/30548014
https://pubmed.ncbi.nlm.nih.gov/30548014
Autor:
Kwang-Ryong Oh, Young-Wan Choi, Chil-Min Kim, Jin Hyeok Ryu, Jung-Min Park, Sung-Bok Kim, Hong-Seung Kim
Publikováno v:
Optics express. 25(21)
In this study, a half-circled cavity based microdisk laser diode is proposed and demonstrated experimentally for an integrated photonic biochemical sensor. Conventional microdisk sensors have limitations in optical coupling and reproducibility. In or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e62ee5e8e35d7ed06b2d7ce4c29e0ea0
https://pubmed.ncbi.nlm.nih.gov/29041167
https://pubmed.ncbi.nlm.nih.gov/29041167
Autor:
Young-Wan Choi, Chil-Min Kim, Tae-Ryong Kim, Mi Jung, Byung-Hee Son, Kwang Ryong Oh, Hong-Seung Kim, Myung-Gi Ji
Publikováno v:
SPIE Proceedings.
In this paper, we propose a bio-sensing method using optical heterodyne detection for ultra-high Q micro-disk laser (MDL) sensor platform. MDL structure with ultra-high Q-factor (> 108) has advantage in detecting a small variation of the lasing wavel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e97b7faafb2b168a1b537915c69c60c
https://doi.org/10.1117/12.2212466
https://doi.org/10.1117/12.2212466
Publikováno v:
Integrated Optics: Devices, Materials, and Technologies XX.
In this paper, we have proposed and demonstrated a high sensitive half ring laser sensor with a deep etched-sensing region based on III-V semiconductor. A whispering gallery mode propagates along the deep etched boundary of the HRL by the deep etched
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b19eeda2789512c8fde8e6c49fe7499c
https://doi.org/10.1117/12.2212030
https://doi.org/10.1117/12.2212030
Publikováno v:
Japanese Journal of Applied Physics. 47:3489-3492
Transmit–receive devices (TRD) monolithically integrated with a butt-coupled semiconductor optical amplifier (SOA) have been designed and fabricated using a buried ridge/ridge waveguide structure with low-threshold-current and high-temperature oper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c466989a0aeca625ec2e76238003589
https://doi.org/10.1143/jjap.47.3489
https://doi.org/10.1143/jjap.47.3489
Autor:
Myung-Gi Ji, Kwang Ryong Oh, Tae-Ryong Kim, Kyoung Jin Choi, Young-Wan Choi, Hong-Seung Kim, Chil-Min Kim
Publikováno v:
Imaging and Applied Optics 2016.
Double cascaded triangular ring resonators(DTRR) based on silicon-on-insulator(SOI) has been proposed and demonstrated for sensitivity enhancement. Each TRR is composed of three total internal reflection(TIR) mirrors, and multi-mode interference(MMI)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b215c39f4ab67c8c0535979b9843cf7a
https://doi.org/10.1364/3d.2016.jt3a.8
https://doi.org/10.1364/3d.2016.jt3a.8
Autor:
Su Hwan Oh, Kwang Ryong Oh, Sang-Ho Park, Yoon-Jung Park, Young-Tak Han, Hee-Kyung Sung, Jang-Uk Shin
Publikováno v:
ETRI Journal. 29:452-456
Very compact 4-channel 200-GHz-spacing external cavity lasers (ECLs) were fabricated by hybrid integration of reflection gratings and superluminescent laser diodes on a planar lightwave circuit chip. The fifth-order gratings as reflection gratings we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc892bc732a0be65fd1850fb6dffc5ec
https://doi.org/10.4218/etrij.07.0106.0285
https://doi.org/10.4218/etrij.07.0106.0285