Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Guang-Hoon Kim"'
Autor:
Wonjun Choi, Munkyu Kang, Jin Hee Hong, Ori Katz, Byunghak Lee, Guang Hoon Kim, Youngwoon Choi, Wonshik Choi
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-10 (2022)
Lensless fibre endoscopes are minimally invasive, but are often rigid and require calibration and fluorescence labelling. Here, the authors present a flexible endoscope based on a bare fibre bundle and a lensless Fourier holographic imaging configura
Externí odkaz:
https://doaj.org/article/8d3cd2bad131404fa86afcaf6bc11967
Autor:
Moonseok Kim, Yonghyeon Jo, Jin Hee Hong, Suhyun Kim, Seokchan Yoon, Kyung-Deok Song, Sungsam Kang, Byunghak Lee, Guang Hoon Kim, Hae-Chul Park, Wonshik Choi
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-9 (2019)
A major challenge of in vivo imaging is imaging deeper, including in turbid tissue. The authors report an adaptive optics based microscope that uses coherent single scattering signal to reduce sample-induced aberrations and enable fast deep-tissue im
Externí odkaz:
https://doaj.org/article/c3eab64dc55e4140830dd24ebc7cf2f2
Autor:
S. Park, J. Yang, C. Kim, Byunghak Lee, Bosu Jeong, E. G. Sall, Jun Wan Kim, V.E. Yashin, Guang-Hoon Kim
Publikováno v:
Quantum Electronics. 51:873-877
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c95df49f79f8775e1f322943a1a48646
https://doi.org/10.1070/qel17622
https://doi.org/10.1070/qel17622
Publikováno v:
Current Applied Physics. 29:9-17
A nanosecond-pulse power source transfers energy to electrons of atmospheric pressure discharges in a nanosecond-scale rising time and shows different plasma chemistry than a slowly varying sinusoidal discharge. We report how the operation parameters
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e55faff22ef27108bdf259a68de8b933
https://doi.org/10.1016/j.cap.2021.05.008
https://doi.org/10.1016/j.cap.2021.05.008
Autor:
Byunghak Lee, Duchang Heo, Jun Wan Kim, E. G. Sall, J. Yang, Vladimir E. Yashin, Guang-Hoon Kim, J.-A. Choi, Bosu Jeong, J. Jang, J.-H. Kim
Publikováno v:
Quantum Electronics. 50:201-204
We present images of microholes drilled in diamond using a homemade femtosecond Yb : KGW laser. We use a femtosecond laser source emitting pulses with a duration of 230 fs at a wavelength of 1030 nm, the focusing spot size amounting to 8.9 μm. The e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0de5cffdd14a9914a1c8d0393ee8db07
https://doi.org/10.1070/qel17097
https://doi.org/10.1070/qel17097
Autor:
Vladimir E. Yashin, Byunghak Lee, J. Yang, Duchang Heo, S. A. Chizhov, Guang-Hoon Kim, Bosu Jeong, Jun Wan Kim, E. G. Sall
Publikováno v:
Quantum Electronics. 49:1168-1171
A three-stage laser amplification system based on thin Yb : YAG rods with diode laser pumping is developed and fabricated. In this system, the average power of a continuous train of femtosecond pulses from a Yb : KGW master oscillator with a pulse re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3efd602014d03f4d191f002f4b6e289a
https://doi.org/10.1070/qel17108
https://doi.org/10.1070/qel17108
Publikováno v:
Laser Physics. 32:105102
In this research, an all- polarization-maintained semiconductor saturable absorber mirror (SESAM) mode-locked fiber oscillator and its amplification by Yb-doped fiber and a Yb:YAG thin rod are presented. From a ring-type cavity configuration created
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d96b58d670d3a42b5b088dba2ec7653
https://doi.org/10.1088/1555-6611/ac92dc
https://doi.org/10.1088/1555-6611/ac92dc
Autor:
Yonghyeon Jo, Wonshik Choi, Sungsam Kang, Hae Chul Park, Moonseok Kim, Byunghak Lee, Guang Hoon Kim, Jin Hee Hong, Kyung Deok Song, Seokchan Yoon, Suhyun Kim
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-9 (2019)
Nature Communications
Nature Communications
Label-free in vivo imaging is crucial for elucidating the underlying mechanisms of many important biological systems in their most native states. However, the applicability of existing modalities has been limited to either superficial layers or early
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d845c50530e0c9adc616eb1fe419ac2
https://doaj.org/article/c3eab64dc55e4140830dd24ebc7cf2f2
https://doaj.org/article/c3eab64dc55e4140830dd24ebc7cf2f2
Publikováno v:
IEEE Transactions on Industrial Electronics. 66:4334-4343
This paper proposes a solid-state pulsed power modulator (PPM) with fast rising/falling time and high repetition rates to drive pockels cells. Since the proposed circuit is based on the modular structure using silicon carbide (SiC) metal–oxide sili
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0a5f7b23d6f7323ad06fa7be0a4d40d
https://doi.org/10.1109/tie.2018.2866078
https://doi.org/10.1109/tie.2018.2866078
Autor:
Pilsung Kang, Sungsam Kang, Ye-Ryoung Lee, Hakseok Ko, Wonshik Choi, Yonghyeon Jo, Guang-Hoon Kim
Publikováno v:
Optics express. 29(3)
Optical imaging of objects embedded within scattering media such as biological tissues suffers from the loss of resolving power. In our previous work, we proposed an approach called collective accumulation of single scattering (CASS) microscopy that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64f3e258efa32ec5859a57475024fe19
https://pubmed.ncbi.nlm.nih.gov/33770938
https://pubmed.ncbi.nlm.nih.gov/33770938