Zobrazeno 1 - 10
of 179
pro vyhledávání: '"Tae Jun Yu"'
Publikováno v:
Sensors, Vol 24, Iss 1, p 17 (2023)
In this study, we simultaneously measured the group refractive index dispersion and thickness of fused silica using a scanning white light interferometer on a spectral range from 800 to 1050 nm. A delay error correction was performed using a He-Ne la
Externí odkaz:
https://doaj.org/article/6ed5be6b9df54ba0a576b2c961089d11
Autor:
Daewoong Park, Sungyoon Lee, Seungjin Hwang, Geonhui Lee, Hanjin Jo, Seryeyohan Cho, Tae Jun Yu
Publikováno v:
AIP Advances, Vol 12, Iss 6, Pp 065130-065130-16 (2022)
We introduce the laser-induced surface processing (LISP) method that imparts hydrophilicity and hydrophobicity using a Nd:YAG nanosecond laser, especially the high-fluence (HF) condition for fast processing and the low-fluence (LF) condition to contr
Externí odkaz:
https://doaj.org/article/98b7dfb818f347668018f220584fc6fa
Publikováno v:
Photonics, Vol 8, Iss 10, p 418 (2021)
The optimization of solid-state laser cavities requires a deep understanding of the gain module, the most critical laser component. This study proposes a procedure for evaluating the performance of the solid-state laser gain module. The thermal effec
Externí odkaz:
https://doaj.org/article/22b6a09202794e5694a6c93934918d52
Autor:
Daewong Park, Sungyoon Lee, Seungjin Hwang, Geonhui Lee, Hanjin Jo, Sanghyun Park, Seryeyohan Cho, Tae Jun Yu
Publikováno v:
Journal of Welding and Joining. 40:156-164
This study introduces laser surface modification technology using a 532 nm Nd:YAG nanosecond laser. A laser beam homogenizer was used to spatially homogenize the laser beam into a square shape with an interference pattern of 30 μm. For laser surface
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96acc17c9dd9ffaae19154cdcb050a3f
https://doi.org/10.5781/jwj.2022.40.2.7
https://doi.org/10.5781/jwj.2022.40.2.7
Autor:
Jae Woong Ko, Hyeon Myeong Oh, Ha Neul Kim, Seung Jin Hwang, Hyun Kwuon Lee, Tae Jun Yu, Young Jo Park
Publikováno v:
Journal of the European Ceramic Society. 41:4419-4423
Transparent neodymium doped Y2O3 ceramics is adopted for use in high power solid-state lasers due to their superior thermal characteristics compared to YAG ceramics. To fabricate highly transparent Y2O3 ceramics, the microstructural evolution was inv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ded1e303a5108f66c4677627c56ed77
https://doi.org/10.1016/j.jeurceramsoc.2021.02.024
https://doi.org/10.1016/j.jeurceramsoc.2021.02.024
Publikováno v:
Applied Sciences, Vol 9, Iss 12, p 2396 (2019)
We have introduced several factors that can be useful for the modeling and analysis of high-power Ti:sapphire laser amplifiers. The amplification model includes the phase distortion effect caused by the atomic phase shift (APS) in gain medium and the
Externí odkaz:
https://doaj.org/article/b6fdd73696b044128836b5bae33f5703
Publikováno v:
Optics Express. 31:1868
We developed a theoretical model for the relationship between the input and amplified laser beams of energy stability and spatial uniformity in the amplification process. 10 Hz, 8 ns, 1064 nm Nd:YAG Q-switched resonator with Nd:YAG main amplifier was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eed2825ed50123553660ae06d51b1d58
https://doi.org/10.1364/oe.479632
https://doi.org/10.1364/oe.479632
Publikováno v:
Journal of the Korean Physical Society. 73:1637-1643
To reduce the laser pulse shape distortion accompanying the amplification process and achieve an intended output pulse shape in the Nd:YAG amplifier chain, we propose a frequency-modulated pulse-amplification method. Assuming carrier-frequency-modula
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4b127167f95c6e9ffc2747fe075d169
https://doi.org/10.3938/jkps.73.1637
https://doi.org/10.3938/jkps.73.1637
Publikováno v:
Journal of the Korean Physical Society. 71:679-683
We have derived modified Frantz-Nodvik equations that simultaneously account for atomic phase shift (APS) and gain depletion as the chirped laser pulse passes through a gain medium, and have analyzed the effect of temporal pulse distortion in a Ti:sa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::317ce61f7e6fddd875b89c9f402c74b1
https://doi.org/10.3938/jkps.71.679
https://doi.org/10.3938/jkps.71.679