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Characterics of 3-channel CBC system controlled in real time; (a) Experimentally measured PIB efficiency, (b-d) combined beam intensity images at different PIB efficiencies.
Coherent Beam Combining
Coherent Beam Combining
Coherent beam combining (CBC) technology overcomes the barrier of single-channel fiber lasers by combining multiple laser beams on a target plane using active phase control algorithms.
Related recent articles:
B. Kim, J. Na, C. Jun, and Y. Jeong, "Direct phase-locking algorithm for tiled-aperture coherent beam combining systems," J. Lightwave Technol. 43(18), 8575-8585 (2025). [Link]
M. Yeo, H. Kim, and Y. Jeong, "Phase control algorithms for CBC systems based on evolutionary strategy for implementation on FPGA boards," J. Lightwave Technol. 43(18), 8563-8574 (2025). [Link]
(a) Detailed soliton formation and dynamics in highly-nonlinear photonic crystal fiber (HNL-PCF). (b) Formation of solitons and quasi-solitons. (c) Spectrograms and linear intensity profiles. (d) Dispersion relations of solitons and quasi-solitons in HNL-PCF.
Fiber-Optic Transmission Dynamics
Fiber-Optic Transmission Dynamics
Diverse optical phenomena such as Brillouin-enhanced four-wave mixing, supercontinuum generation, rogue waves, and solitons can occur from the interplay of linear and nonlinear light-matter interactions in optical fibers.
Related recent articles:
K. Park, A. V. Harish, J. Nilsson, and Y. Jeong, "Study on the asymptotic behavior of the interplay of stimulated Brillouin scattering and Brillouin-enhanced four-wave mixing in standard single-mode fibers," J. Korean Phys. Soc. 80, 37-52 (2022). [Link]
K. Park, J. Na, J. Kim, and Y. Jeong, "Numerical study on supercontinuum generation in active high nonlinear photonic crystal fiber with anomalous dispersion," IEEE J. Quantum Electron. 56(2):6800109 (2020). [Link]
Schematic of a superradiant system with two atomic ensembles. Each ensemble has its own transition frequency.
Quantum Optics
Quantum Optics
In the opposite regime of high-power lasers, where the emission intensity is in the order of individual photons, it is essential to quantize the electromagnetic field as well as the energy levels of the emitter. Application of quantum optics such as squeezed state generation are currently being studied.
Related recent articles:
H. An and Y. Jeong, "Numerical study of superradiant mixing by an unsynchronized superradiant state of multiple atomic ensembles," Opt. Express 28(15), 22276-22286 (2020). [Link]
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Laser Applications
Laser Applications
Current topics of interest in laser applications include: optical neural networks, laser ablation, burst pulses, and laser-assisted SEM.
Related recent articles:
S. Hong, H. Kim, K. Park, Y. Kwon, H. Chang, S. Piao, Y. Lee, S. Oh and Y. Jeong, "Spatiotemporal laser speckle flowmetry based on elastic-walled U-shaped tubing apparatus, optical method for urinary flow measurement," vol 57, mo.10, pp.104110, 2018, Optical Engineering. [Link]
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