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Research
Prof. Jae-Ho Han’s paper published in IEEE Journal of Selected Topics in Quantum Electronics
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Prof. Jaeho Han’s new research on `Dichloromethane Detection Based on Near Infrared Absorptive Sensing` was published in IEEE Journal of Selected Topics in Quantum Electronics.

This paper demonstrated a biophotonic near-infrared sensor using a tunable fiber ring laser based on an absorption spectroscopic method. A continuous wave near-infrared source operating in the C-band wavelength range has been developed and the Sagnac loop mirror, which operates as a saturable absorber to effectively narrow down the laser linewidth, has been used, then we could reduce the external noise and stabilize the laser frequency to achieve a narrow linewidth by forming a fiber-based interferometer loop with an unpumped erbium-doped fiber inserted. The result shows an accuracy of 16 pm or 0.06 cm−1, which is much more precise than the previous results. The tunable laser source in this absorption spectroscopy method has demonstrated its potential for use in applications such as high-resolution molecular spectroscopy, multispecies trace gas detection, and measurements of broadband absorbers.

Please refer to the following title and abstract.

Title: Dichloromethane Detection Based on Near Infrared Absorptive Sensing

Abstract:
Dichloromethane (DCM), a clear and lipophilic liquid that has been primarily used in industrial applications, has caused organic poisoning upon inhalation during its wide use as a chlorinated organic solvent and in other industrial processes. In this work, a biophotonic near-infrared sensor using a tunable fiber ring laser based on an absorption spectroscopic method has been demonstrated in order to perform DCM detection. A continuous wave near-infrared source operating in the C-band wavelength range has been developed and optically characterized. The principle of the Sagnac loop mirror, which operates as a saturable absorber to effectively narrow down the laser linewidth, has been reviewed. By forming a fiber-based interferometer loop with an unpumped erbium-doped fiber inserted, we could reduce the external noise and stabilize the laser frequency to achieve a narrow linewidth. The result shows an accuracy of 16 pm or 0.06 cm-1, which is much more precise than the previous results of 1 nm or 4 cm-1 using a method based on a broadband infrared light source.

 

 

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Research
Prof. Jichai Jeong`s paper published in Laser Physics Letters
Prof. Jichai Jeong`s paper published in Laser Physics Letters
Prof. Jichai Jeong`s new research on `Graphics processing unit aided highly stable real-time spectral-domain optical coherence tomography at 1375 nm based on dual-coupled-line subtraction` was published in Laser Physics Letters. Title: Graphics processing unit aided highly stable real-time spectral-domain optical coherence tomography at 1375 nm based on dual-coupled-line subtraction Abstract:  We have proposed and demonstrated a highly sta…

2013-03-21

Prof. Lee`s elected as IEEE fellow
Prof. Lee`s elected as IEEE fellow
Prof. Seong-Whan Lee (Chair of Dept. of BCE, Korea University, 48) was appointed as IEEE fellow for the achievement in Patter Recognition technology field. It is the honor to be appointed as fellow in IEEE who announced him his eligibility as fellow for IEEE as of January 1, 2010. Prof. Lee has been recently appointed as an adjunct professor for Hyundai-Kia Chair professor and fellow for KAST last November. Prof. Lee has published 105 papers related in …

2009-11-25

Prof. Lee`s elected as a full member of KAST
Prof. Lee`s elected as a full member of KAST
In ‘2009 a regular general meeting of the Korean Academy of Science and Technology held at Hotel Lotte on Nov. 20th, Friday, Prof. Seong-Whan Lee (48) was appointed as fellow of the Korean Academy of Science and Technology (KAST). He’s currently adjunct professor for Hyundai-Kia Chair professor. He was acknowledged his achievement in Information and Network and Pattern Recognition with 105 publications in SCI journals and over 3,500 citations. Founde…

2009-11-20

3T FMRI purchasing decided
3T FMRI purchasing decided
3T FMRI equipment necessary for studies of brain and cognitive engineering was decided to purchase and will be installed for the Dept. of Brain and Cognitive Engineering of Korea University by December this year according to World Class University contract between Korea University and MEST. Korea University showed its investment to Brain Engineering field by allowing the budget of 3.5 billion dollars for purchasing. Along with the exclusive use of researc…

2009-10-15

Prof. Seong-Whan Lee`s paper published in Pattern Recognition
Prof. Seong-Whan Lee`s paper published in Pattern Recognition
Prof. Seong-Whan Lee’s new research on `Adaptive Occlusion State Estimation for Human Pose Tracking under Self-Occlusions` was accepted in Pattern Recognition (IF top 10%) In this paper, they proposed a method to solve self-occlusion problem in 3D human pose tracking. They modeled an “occlusion relationship (= state)” between human body parts as a graph and proposed a novel “adaptive occlusion state estimation” method, which infer human body con…

2012-10-25

Prof. Seong-Whan Lee`s paper published in Pattern Recognition
Prof. Seong-Whan Lee`s paper published in Pattern Recognition
Prof. Seong-Whan Lee’s new research on `Person Authentication from Neural Activity of Face-Specific Visual Self-Representation` was accepted in Pattern Recognition (IF top 10%) This paper has been contributed to EEG based new biometric system construction based on the neurophysiological features of face-specific visual self representation in a human brain. In particular, unlike previous methods that considered the brain activities of the resting state,…

2012-10-25

Prof. Jae-Ho Han’s paper published in IEEE Journal of Selected Topics in Quantum Electronics
Prof. Jae-Ho Han’s paper published in IEEE Journal of Selected Topics in Quant…
Prof. Jaeho Han’s new research on `Dichloromethane Detection Based on Near Infrared Absorptive Sensing` was published in IEEE Journal of Selected Topics in Quantum Electronics. This paper demonstrated a biophotonic near-infrared sensor using a tunable fiber ring laser based on an absorption spectroscopic method. A continuous wave near-infrared source operating in the C-band wavelength range has been developed and the Sagnac loop mirror, which operates a…

2012-08-10

Prof. Jichai Jeong`s paper published in Journal of Lightwave Technology
Prof. Jichai Jeong`s paper published in Journal of Lightwave Technology
Prof. Jichai Jeong’s new research on ‘DFT-Precoded Coherent Optical OFDM with Hermitian Symmetry for Fiber Nonlinearity Mitigation’ was published in Journal of Lightwave Technology

2012-08-10

Prof. Anil Jain`s paper published in IEEE Transactions on Pattern Analysis and Machine Intelligence
Prof. Anil Jain`s paper published in IEEE Transactions on Pattern Analysis and M…
Prof. Anil Jain’s new research on `Altered Fingerprints: Analysis and Detection` was published in IEEE Transactions on Pattern Analysis and Machine Intelligence (IF top 1%)

2012-08-10

Prof. Jeehyun Kwag’s paper published in Neuropharmacology
Prof. Jeehyun Kwag’s paper published in Neuropharmacology
Prof. Jeehyun Kwag’s new research on `Gating of NMDA Receptor-Mediated Hippocampal Spike Timing-Dependent Potentiation by MGluR5` was published in Neuropharmacology This paper demonstrates that the timing long-term poten hippocampal synapses. The induction of tLTP was blocked antagonist and by the selective mGluR5 blockers, MPEP(2 ((2-Methyl-4-thiazolyl)ethynyl)pyridine), whereas the activation of Dihydroxyphenylglycine(DHPG) facilitated the induction …

2012-08-10

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