고출력 광섬유 레이저용 (18+1)×1 편광유지 펌프 및 신호광 결합기 제작 및 출력 특성

이성헌,김기혁,양환석,조승용,김선주,박민규,이정환,Lee, Sung Hun,Kim, Ki Hyuck,Yang, Hwan Seok,Cho, Seung Yong,Kim, Seon Ju,Park, Min Kyu,Lee, Jung Hwan 한국광학회 2019 한국광학회지 Vol.30 No.5

본 논문에서는 고출력 광섬유 레이저의 핵심 부품인 펌프광 결합기를 제작하였으며, 고출력 성능시험 장비를 이용하여 출력특성을 측정하였다. $(18+1){\times}1$ 펌프광 결합기는 1개의 신호광 광섬유와 18개의 펌프광 광섬유들로 이뤄진 광섬유 다발, 출력 광섬유와 하우징으로 구성되어 있다. 신호광 광섬유와 출력 광섬유는 편광유지 광섬유를 사용하여 제작하였다. 광섬유 다발의 테이퍼링 길이에 따른 신호광의 손실을 측정하여 테이퍼링 길이를 18 mm로 최적화하였다. 제작된 $(18+1){\times}1$ 펌프광 결합기의 신호광 삽입 손실, 펌프광 투과율 및 편광 소광률은 각각 6.5%, 98.07% 및 18.0 dB로 측정되었다. 18개의 펌프 레이저 다이오드를 이용하여 2 kW의 고출력에서 펌프광 결합기의 온도 분포를 열화상 카메라를 이용하여 측정 및 분석하였다. In this paper a pump combiner, a key component of a high-power fiber laser, was fabricated, and its output characteristics measured using a high-power performance measuring instrument. The $(18+1){\times}1$ pump combiner consists of an optical-fiber bundle of one signal fiber and 18 pump fibers, an output optical fiber, and housing. The signal and output fibers were fabricated using polarization-maintaining optical fiber. By measuring the loss of signal light along the tapering length of the optical-fiber bundle, the tapering length was optimized to 18 mm. Signal-light insertion loss, pump-light transmittance, and polarization extinction ratio of the fabricated $(18+1){\times}1$ pump combiner were measured as 6.5%, 98.07%, and 18.0 dB respectively. The temperature distribution of the pump combiner, at a high power of 2 kW using 18 pump laser diodes, was measured and analyzed using a thermal-imaging camera.

다한증 환자의 한의학적 변증특성 및 자율신경계 기능과의 상관관계

이성헌,김재환,노영래,이형구,정승연,정승기,정희재,Lee, Sung-Hun,Kim, Jae-Hwan,Roh, Yeong-lae,Rhee, Hyung-Koo,Jeong, Seung-Yeon,Jung, Sung-Ki,Jung, Hee-Jae 대한한방내과학회 2008 大韓韓方內科學會誌 Vol.29 No.2

Objective : Hyperhidrosis is a condition characterized by excessive sweating. Some studies suggest that hyperhidrosis is associated with autonomic nervous system dysfunction. Hyperhidrosis is often accompanied by hypersensitivity, tension, irritability, heat flashes, fatigue, etc. This study was designed to evaluate the correlation between Oriental Medicine diagnosis and the autonomic nervous system function in patients with hyperhidrosis using Heart Rate Variability (HRV) analysis. Methods : 23 palmar and plantar hyperhidrosis patients and 10 systemic hyperhidrosis patients were recruited and evaluated by Oriental Medicine diagnostic questionnaire and HRV analysis. The Oriental Medicine diagnostic questionnaire used a three-dimensional diagnosis that classified patients into Cold or Heat Syndrome, Yin or Yang Syndrome, and Deficiency or Excess Syndrome. Measured indices of HRV used the frequency domain analysis(i.e. TP, VLF, LF, HF and LF/HF ratio). Also, measure indices of HRV adjusted for aging effects were evaluated. Results : Cold/Heat Syndrome was not associated with hyperhidrosis prevalence nor the HRV analysis in hyperhidrosis patients. The Yang Syndrome group(78.8%) was more strongly correlated than the Yin Syndrome group(21.2%), and character of Yang was correlated with the adjusted TP and adjusted LF. The LF/HF ratio in the Excess Syndrome group was significantly higher than the LF/HF ratio in the Deficiency Syndrome group. Conclusion : Hyperhidrosis was not associated with the Cold/Heat Syndrome, but was found to be closely associated with the Yang Syndrome. The LF/HF ratio was significantly higher in the Excess Syndrome group than in the Deficiency Syndrome group in hyperhidrosis patients.

대구경 광섬유 엔드캡 제작장비 개발

이성헌,황순휘,김태균,양환석,윤영갑,김선주,Lee, Sung Hun,Hwang, Soon Hwi,Kim, Tae Kyun,Yang, Whan Seok,Yoon, Yeong Gap,Kim, Seon Ju 한국광학회 2021 한국광학회지 Vol.32 No.2

본 논문에서는 고출력 광섬유 레이저의 핵심 부품인 대구경 광섬유 엔드캡을 제작하는 장비를 설계 및 제작하였으며, 제작장비를 이용하여 대구경 광섬유 엔드캡을 제작하였다. 대구경 광섬유 엔드캡 제작장비는 레이저 광을 조사하여 접속 열원으로 사용하기 위한 CO2 레이저 광원부, 대구경 광섬유와 엔드캡의 위치를 이송하기 위한 정밀 스테이지 조립체, 스테이지 조립체와 연동되어 융착 시 정렬에 사용되는 비전 시스템으로 구성되어 있다. 레이저 광원의 출력은 스테이지 조립체와 연동되어 출력을 제어하며, 비전 시스템으로 대구경 편광유지 광섬유의 편광축을 정렬할 수 있도록 제작되었다. 자체 제작한 장비를 이용하여 클래드 직경이 400 ㎛인 대구경 편광유지 광섬유와 10(W)×5(D)×2(H) ㎣의 엔드캡을 레이저 융착하여 대구경 광섬유 엔드캡을 제작하였다. 제작된 대구경 광섬유 엔드캡의 신호광 삽입손실, 소광률 및 빔품질(M2)은 각각 0.6%, 16.7 dB, M2x=1.21, M2y=1.22로 측정되었다. In this paper, we design and construct the equipment to manufacture large-diameter optical fiber end caps, which are the core parts of high-power fiber lasers, and we fabricate large-diameter optical fiber end caps using the home-made equipment. This equipment consists of a CO2 laser as a fusion-splice heat source, a precision stage assembly for transferring the position of a large-diameter optical fiber and an end cap, and a vision system used for alignment when the fusion splice is interlocked with the stage assembly. The output of the laser source is interlocked with the stage assembly to control the output, and the equipment is manufactured to align the polarization axis of the large-diameter polarization-maintaining optical fiber with the vision system. Optical fiber end caps were manufactured by laser fusion splicing of a large-diameter polarization-maintaining optical fiber with a clad diameter of 400 ㎛ and an end cap of 10×5×2 ㎣ (W×D×H) using home-made equipment. Signal-light insertion loss, polarization extinction ratio, and beam quality M2 of the fabricated large-diameter optical fiber end caps were measured to be 0.6%, 16.7 dB, and 1.21, respectively.

일차성 다한증 환자 26명의 한의학적 치료 후 삶의 질 변화에 대한 임상적 평가

이성헌,노영래,황준호,정승연,정승기,정희재,Lee, Sung-Hun,Roh, Young-Lae,Hwang, Joon-Ho,Jeong, Seung-Yeon,Jeong, Sung-Ki,Jung, Hee-Jae 대한한방내과학회 2007 大韓韓方內科學會誌 Vol.28 No.3

Backgrounds and Objectives: Primary hyperhidrosis deeply affect a patient's quality of life, resulting in impairments of daily activities, social interactions and occupational activities. The objectives of the study were to assess quality of life(QOL) in patients with primary hyperhidrosis before and after treatment with oriental medicine. Methods : Between December 2006 and July 2007, 26 patients underwent oriental medicine treatment. which consisted of herb medicine. acupuncture and iontophosis (if palmar/plantar hyperhidrosis) treatment. QOL questionnaires comprised of dermatology life quality index (DLQI) and visual analogue scale (VAS) were employed before and after treatment Results : All 26 patients were evaluated. The treatment controlled primary hyperhidrosis in 84.6% of cases. The mean of DLQI score before treatment was 16.65 after treatment mean DLQI score was 8.18. The mean of VAS before treatment was 91.35 after treatment mean VAS was 49.92. QOL in patients with primary hyperhidrosis significantly improved after oriental medicine treatment. The improvements in QOL were similar in patientswith palmar/plantar, head, and systemic hyperhidrosis. Conclusions : Oriental medicine treatment leads to significantly improved QOL in patients with primary hyperhidrosis. Further studies are needed to evaluate the objective efficacy in patients with primary hyperhidrosis before and after oriental medicine treatment.

시간영역 광 간섭 단층촬영 시스템의 소형 엔도스코프 제작 및 영상구현

김영관,이성헌,김용평,Kim, Young-Kwan,Lee, Sung-Hun,Kim, Yong-Pyung 한국광학회 2010 한국광학회지 Vol.21 No.5

We fabricated and characterized a compact endoscopic catheter for optical coherence tomography. The optical delay line (ODL), composed of a cylindrical piezoelectric transducer (PZT) and an optical fiber, was operated with a 1 kHz sinusoidal driving wave in the time-domain. When the ODL was driven with a sinusoidal wave function, the axial scanning speed was 6 m/s and the axial acquisition rate was 2000 line/s at a depth of about 3 mm. Endoscopic OCT images of a human finger and earhole were successfully obtained with an image rate of ten frames per second. 광 간섭 단층촬영 시스템(OCT)을 위한 소형의 광섬유 도관형 주사장치인 엔도스코프(endoscope catheter)를 제작하였다. 깊이방향 주사장치인 원통형 압전소자(PZT)를 이용한 광경로 지연기는 정현파 1 kHz로 구동하여 시간영역에서 엔도스코프 OCT 영상을 구현하였다. 정현파로 구동한 광경로 지연기의 속도는 6 m/s 이고, 깊이방향 스캐닝의 데이터 획득은 3 mm 기준에서 초당 2000 라인이다. 제작한 엔도스코프로 사람의 손가락 및 귀에 대한 초당 10프레임의 OCT 영상을 성공적으로 획득하였다.

비체증(鼻涕證), 해수증(咳嗽證), 효천증(哮喘證) 환자(患者)에 대한 양도락(良導絡) . 맥진검사(脈診檢査)의 진단가치(診斷價値)

심봉암,이성헌,정희재,정승기,Shen, Feng-Yan,Lee, Sung-Hun,Jung, Hee-Jae,Jung, Sung-Ki 대한한방내과학회 2008 大韓韓方內科學會誌 Vol.29 No.3

Objectives : Ryodoraku, which is a physiological function test using electric current, is closely related to skin sympathetic tone. Pulse analysis is known to reflect cardiovascular reactivity. Refer to the previous researches Ryodoraku and pulse analysis have value as tools for diagnosing respiratory diseases. In this study we examined the diagnostic values of Ryodoraku and pulse analysis for respiratory disease patients. Methods : For this study. we conducted Ryodoraku and pulse analysis on 114 people, including 83 respiratory disease outpatients and 31 volunteers who did not have any respiratory symptoms or disease history. The respiratory patients were divided into three subgroups according to their symptoms: rhinorrhea group, cough-sputum group and wheezing-dyspnea group. Then we compared the disease groups with the control group. Results : When all experimental groups were compared with the control group, mean Ryodoraku was significantly lower. Mean H2, mean H3 and mean H6 were significantly lower in the rhinorrhea group (P<0.05), all the test results of Ryodoraku were evidently lower in the cough-sputum group (P<0.01), and most results of Ryodoraku were evidently lower in the wheezing-dyspnea group except H1 (P<0.01). Compared with the control group on pulse analysis, mean YP+/YP- was significantly lower in the wheezing-dyspnea group (P<0.05). Conclusion : Ryodoraku and pulse analysis were found to have a high value as quantitative diagnosis tools reflecting individuals' weakness and firmness. Nevertheless, more research is needed to find the further values.

가미청상보하탕(加味淸上補下湯) 열수 및 에탄올 추출물이 천식 관련 cytokine 분비에 미치는 영향

정승연,이성헌,황준호,이건영,김진주,정희재,이형구,정승기,Jeong, Seung-Yeon,Lee, Sung-Hun,Hwang, Joon-Ho,Lee, Kun-Young,Kim, Jin-Ju,Jung, Hee-Jae,Rhee, Hyung-Koo,Jung, Sung-Ki 대한한방내과학회 2006 大韓韓方內科學會誌 Vol.27 No.2

Backgrounds and Objectives: A major goat in asthma therapy isto reduce or prevent the inflammatory response associated with bronchial hyperresponsiveness, reversible airway obstruction and airway remodelling. Many studies have shown that eosinophilic infiltration is a prominent feathure in the pathophysiology of asthma. The importance of the Presence of eosinophils in the airways of asthmatics has long been recognized, but the mechanism by which these cells are recruited and retained in the lung are only now being elucidated Production of chemotactic cytokines by bronchial epithelial cells may contribute to the local accumulation of eosinophils in Patients with bronchial asthma. This study was designed to investigate the inhibitory effect of extraction of herbal dicoction, Gamichungsangbohatang(GMCSBHT) on eosinophil chemotactic cytokines. Material and Methods:We used water and 70% ethanol extracts of GMCSBHT and pulmonary epithelial cell lines A549(human type II -like epithelial cells). We estimated cytotoxic effects of GMCSBHT, and estimated the effects of water and 70% ethanol extracts of GMCSBHT on chemokines from prestimulated A549 cells by sandwich ELISA. Results: Chemokines of eotaxin, IL-8 were inhibited by GMCSBHT in dose-dependent manner. And ethanol extract of GMCSBHT has more inhibitory effects on eotaxin, IL-8 than hot water extract. Conculusions: These findings indicate that the supression of the expression of chemokines can be accomplished by GMCSBHT treatment, so GMCSBHT may inhibit the iuflammatory process by eosinophils in asthma.

Synthesis and Curing Behaviors of Dual Curable Temporary Bonding and Debonding Adhesives for 3D Multichip Packaging

Seung-Woo Lee(이승우),Tae-Hyung Lee(이태형),Ji-Won park(박지원),Cho-Hee Park(박초희),Hyun-Joong Kim(김현중),Jak-Hak Lee(이재학),Hyung-Jun Kim(김형준),Sung-Hun Lee(이성헌),Seung-Man Kim(김승만),Jun-Yeob Song(송준엽) 한국정밀공학회 2014 한국정밀공학회 학술발표대회 논문집 Vol.2014 No.5월

만성기침에 대한 보조제제로써 청인(淸咽)트로키 복합투여의 임상적 유효성 평가

노영래,최준용,이성헌,김재환,정희재,정승기,Roh, Young-Lae,Choi, Jun-Yong,Lee, Sung-Hun,Kim, Jae-Hwan,Jung, Hee-Jae,Jung, Sung-Ki 대한한방내과학회 2008 大韓韓方內科學會誌 Vol.29 No.3

Objectives : We designed this study to evaluate the effectiveness of Chungin-troche(CIT) preparation as an adjunctive medicine to a herbal extract of Chungsangboha-tanggagambang(CSBH). Methods : A paralled, comparative study of CSBH+CIT and CSBH was conducted on 42 patients of chronic cough who attended Division of Allergy, Immune & Respiratory System, Department of Internal Medicine, College of Oriental Medicine, Kyung Hee University between December, 2007 and June, 2008. The treatment in each group lasted for two weeks. Patients were asked to fill in the Leicester Cough Questionnaire (LCQ) before and after administration of each treatment legimen. Results : 42 patients completed the trial and no adverse effects were reported. Both CSBH +CIT group and CSBH group showed statistical significant improvement in total LCQ score after 2 weeks from baseline. Social domain score and total score in patients taking CSBH+CIT showed a statistical significant increase compared to those scores in CSBH patients. Conclusion : CSBH+CIT compositive preparation and CSBH separate preparation appeared to have some benefits in the treatment of chronic cough. However, additional CIT preparation to CSBH can improve social domain in LCQ of chronic cough patients.

심박변이도 측정을 통한 두한증(頭汗證) 환자의 자율신경계 기능 평가

이건영,황준호,이성헌,정승연,이형구,정승기,정희재,Lee, Kun-Young,Hwang, Joon-Ho,Lee, Sung-Hun,Jeong, Seung-Yeon,Rhee, Hyung-Koo,Jung, Sung-Ki,Jung, Hee-Jae 대한한방내과학회 2006 大韓韓方內科學會誌 Vol.27 No.4

Objectives : Essential hyperhidrosis is a socially and occupationally disabling disorder. There are many suggestions that hyperhidrosis is associated with the autonomic nervous system, especiallythe sympathetic system. This study was designed to investigate the autonomic nerve system in patients with essential hyperhidrosis and healthy controls by the frequency domain analysis of heart rate variability (HRV). Methods : 17 head-hyperhidrosis patients in the ambulatory care were investigated. All were inspected at the first medical examination. using the PSA of HRV. HRV was measured for minutes after 5 minutes bed rest. We checked the frequency domain analysis of HRV (i.e. TP, VLF, LF, HF) which were transformed into natural logarithm of patients against the standard measures of the HRV components. Then we compared the values of patients with means of normal Korean subjects. Results : The values of natural logarithmic measure of HRV (LnTP, LnHF, LnLF, LnVLF) of patients With head-hyperhidrosis we examined were $6.85{\pm}1.61$, $4.93{\pm}$2.00, $5.40{\pm}1.83$, and $6.13{\pm}1.37$, respectively. None of these values were higher than means of normal subjects. Conclusions : This study suggests that the function of the autonomic nervous system does not increase in patients with head-hyperhidrosis.