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Characteristics of Stimulated Brillouin Scattering Suppression in High-power Fiber Lasers Using Temperature Gradients 利用温度梯度抑制高功率光纤激光器受激布里渊散射特性
IF 0.1
Korean Journal of Optics and Photonics Pub Date : 2019-01-01 DOI: 10.3807/KJOP.2019.30.4.167
Seongmook Jeong, Kihyuck Kim, Sunghun Lee, Soonhwi Hwang, Hwan-seok Yang, Byunghyuck Moon, Y. Jhon, M. Park, Jung Hwan Lee
{"title":"Characteristics of Stimulated Brillouin Scattering Suppression in High-power Fiber Lasers Using Temperature Gradients","authors":"Seongmook Jeong, Kihyuck Kim, Sunghun Lee, Soonhwi Hwang, Hwan-seok Yang, Byunghyuck Moon, Y. Jhon, M. Park, Jung Hwan Lee","doi":"10.3807/KJOP.2019.30.4.167","DOIUrl":"https://doi.org/10.3807/KJOP.2019.30.4.167","url":null,"abstract":"Byunghyuck Moon2, Young Min Jhon2, Min Kyu Park3, and Jung Hwan Lee3 1Future Technology R&D-2., LIGNex1, 207, Mabuk-ro, Giheung-gu, Yongin 16911, Korea 2Sensor System Research Center, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Korea 3Ground Technology Research Institute 3rd Directorate, Agency for Defense Development, Yuseong P.O.Box 35, Daejeon 34188, Korea","PeriodicalId":42467,"journal":{"name":"Korean Journal of Optics and Photonics","volume":"30 1","pages":"167-173"},"PeriodicalIF":0.1,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70160708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
50-GHz AWG Interrogation of a Multiple-FBG Temperature Sensor 多光纤光栅温度传感器的50 ghz AWG探测
IF 0.1
Korean Journal of Optics and Photonics Pub Date : 2019-01-01 DOI: 10.3807/KJOP.2019.30.6.226
H. Moon, S. Kwak, Jin-Bong Kim, JunKyu Yim, Dong-Young Park, K. Im
{"title":"50-GHz AWG Interrogation of a Multiple-FBG Temperature Sensor","authors":"H. Moon, S. Kwak, Jin-Bong Kim, JunKyu Yim, Dong-Young Park, K. Im","doi":"10.3807/KJOP.2019.30.6.226","DOIUrl":"https://doi.org/10.3807/KJOP.2019.30.6.226","url":null,"abstract":"HyungMyung Moon, SeungChan Kwak, JinBong Kim, Ju-Wan Yim, Dong-Young Park, and Kiegon Im 1PPI Inc., 345, Cheomdangwagi-ro, Buk-gu, Gwangju 61008, Korea 2School of Chemical Engineering, Chonnam National University, 77, Yongbong-ro, Buk-gu, Gwangju 61186, Korea 3Department of Physics, Chonnam National University, 77, Yongbong-ro, Buk-gu, Gwangju 61186, Korea 4SJPhotonics, 333, Cheomdangwagi-ro, Buk-gu, Gwangju 61008, Korea","PeriodicalId":42467,"journal":{"name":"Korean Journal of Optics and Photonics","volume":"30 1","pages":"226-229"},"PeriodicalIF":0.1,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70160441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Full-field Distortion Measurement of Virtual-reality Devices Using Camera Calibration and Probe Rotation 基于摄像机标定和探头旋转的虚拟现实设备全场畸变测量
IF 0.1
Korean Journal of Optics and Photonics Pub Date : 2019-01-01 DOI: 10.3807/KJOP.2019.30.6.237
Dong-Geun Yang, Pilseong Kang, Y. Ghim
{"title":"Full-field Distortion Measurement of Virtual-reality Devices Using Camera Calibration and Probe Rotation","authors":"Dong-Geun Yang, Pilseong Kang, Y. Ghim","doi":"10.3807/KJOP.2019.30.6.237","DOIUrl":"https://doi.org/10.3807/KJOP.2019.30.6.237","url":null,"abstract":"A compact virtual-reality (VR) device with wider field of view provides users with a more realistic experience and comfortable fit, but VR lens distortion is inevitable, and the amount of distortion must be measured for correction. In this paper, we propose two different full-field distortion-measurement methods, considering the characteristics of the VR device. The first is the distortion-measurement method using multiple images based on camera calibration, which is a well-known technique for the correction of camera-lens distortion. The other is the distortion-measurement method by measuring lens distortion at multiple measurement points by rotating a camera. Our proposed methods are verified by measuring the lens distortion of Google Cardboard, as a representative sample of a commercial VR device, and comparing our measurement results to a simulation using the nominal values.","PeriodicalId":42467,"journal":{"name":"Korean Journal of Optics and Photonics","volume":"30 1","pages":"237-242"},"PeriodicalIF":0.1,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70160507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modified Thermal-divergence Model for a High-power Laser Diode 大功率激光二极管的改进热发散模型
IF 0.1
Korean Journal of Optics and Photonics Pub Date : 2019-01-01 DOI: 10.3807/KJOP.2019.30.5.193
Hyeon Joong Yong, Young Jae Baek, D. Yu, O. Beomhoan
{"title":"Modified Thermal-divergence Model for a High-power Laser Diode","authors":"Hyeon Joong Yong, Young Jae Baek, D. Yu, O. Beomhoan","doi":"10.3807/KJOP.2019.30.5.193","DOIUrl":"https://doi.org/10.3807/KJOP.2019.30.5.193","url":null,"abstract":"The design and control of thermal flow is important for the operation of high-power laser diodes (LDs). It is necessary to analyze and improve the thermal bottleneck near the active layer of an LD. As the error in prediction of the thermal resistance of an LD is large, typically due to the hyperbolic increase and saturation to linear increase of the thermal resistance as a function of thickness, it is helpful to use a simple, modified divergence model for the improvement and optimization of thermal resistance. The characteristics of LDs are described quite well, in that the values for simulated thermal resistance curves and the thermal cross section followed are almost the same as the values from the model function. Also, the thermal-cross-section curve obtained by differentiating the thermal resistance is good for identifying thermal bottlenecks intuitively, and is also fitted quite well by the model proposed for both a typical LD structure and an improved LD with thin capping and high thermal conductivity.","PeriodicalId":42467,"journal":{"name":"Korean Journal of Optics and Photonics","volume":"30 1","pages":"193-196"},"PeriodicalIF":0.1,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70160778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Real-Time Highly Sensitive Measurement of Myocardial Infarction Biomarkers Using Silicon-Based Ellipsometric Biosensors 利用硅基椭偏生物传感器实时高灵敏度测量心肌梗死生物标志物
IF 0.1
Korean Journal of Optics and Photonics Pub Date : 2019-01-01 DOI: 10.3807/KJOP.2019.30.2.059
Y. G. Min, H. Cho, Jo Jae Heung
{"title":"Real-Time Highly Sensitive Measurement of Myocardial Infarction Biomarkers Using Silicon-Based Ellipsometric Biosensors","authors":"Y. G. Min, H. Cho, Jo Jae Heung","doi":"10.3807/KJOP.2019.30.2.059","DOIUrl":"https://doi.org/10.3807/KJOP.2019.30.2.059","url":null,"abstract":"$2^{circ}$ 기울어진 산화막 코팅 실리콘 기판의 바이오칩과 프리즘으로 제작한 바이오센서와 검광자 회전 타원편광계를 이용하여 심근경색 생체표지자인 미오글로빈과 cTnI의 진단 농도를 수백 초 내에 실시간 초고감도로 측정하는데 성공하였다. 러닝 버퍼로는 순수한 phosphate buffered saline (PBS) 또는 PBS에 10% ...","PeriodicalId":42467,"journal":{"name":"Korean Journal of Optics and Photonics","volume":"30 1","pages":"59-66"},"PeriodicalIF":0.1,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70160467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient Humidity Color Sensor Based on a Photonic Crystal with a Metal-Organic Framework 基于金属有机框架光子晶体的高效湿度彩色传感器
IF 0.1
Korean Journal of Optics and Photonics Pub Date : 2018-12-01 DOI: 10.3807/KJOP.2018.29.6.268
Jun Yong Kim, Sunghak Lee, Y. Do
{"title":"Efficient Humidity Color Sensor Based on a Photonic Crystal with a Metal-Organic Framework","authors":"Jun Yong Kim, Sunghak Lee, Y. Do","doi":"10.3807/KJOP.2018.29.6.268","DOIUrl":"https://doi.org/10.3807/KJOP.2018.29.6.268","url":null,"abstract":"In this study we suggest a humidity-sensitive color sensor using a one-dimensional photonic crystal and Hong Kong University of Science and Technology-1 (HKUST-1), which is a metal-organic framework (MOF) substance. One-dimensional photonic crystals have a photonic band gap, due to a periodic refractive-index change, and block and reflect light components in a specific wavelength band. The refractive index of HKUST-1 differs in dry and humid environments. Herein we designed a sensor using the presence of the photonic band gap, with FDTD simulation. As a result of optical analysis, the color conversion of the reflected light was superior to the color conversion of the transmitted light. When the center wavelength of the photonic band gap was 550 nm, the maximum peak value of the wet environment increased by a factor of about 9.5 compared to the dry environment, and the color conversion from achromatic to green was excellent as a sensor. The results of this study suggest the application of MOF materials to moisture sensors, and the nanostructure design of MOF materials will expand the applications to industrial devices.","PeriodicalId":42467,"journal":{"name":"Korean Journal of Optics and Photonics","volume":"29 1","pages":"268-274"},"PeriodicalIF":0.1,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44434466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Antireflective Film Design to Improve the Optical Efficiency of Organic Light-emitting Diode Displays 提高有机发光二极管显示器光学效率的减反射膜设计
IF 0.1
Korean Journal of Optics and Photonics Pub Date : 2018-01-01 DOI: 10.3807/KJOP.2018.29.6.262
Kiman Kim, Y. Lim, Le Van Doan, Gi-dong Lee, Seunghee Lee
{"title":"Antireflective Film Design to Improve the Optical Efficiency of Organic Light-emitting Diode Displays","authors":"Kiman Kim, Y. Lim, Le Van Doan, Gi-dong Lee, Seunghee Lee","doi":"10.3807/KJOP.2018.29.6.262","DOIUrl":"https://doi.org/10.3807/KJOP.2018.29.6.262","url":null,"abstract":"Kiman Kim, Young Jin Lim, Le Van Doan, Gi-Dong Lee, and Seung Hee Lee 1Department of Advanced Organic Materials Engineering, Chonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju 54896, Korea 2Applied Materials Institute for BIN Convergence, Department of BIN Convergence Technology and Department of Polymer-Nano Science and Technology, Chonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju 54896, Korea 3Department of Electronics Engineering, Dong-A University, 37, Nakdong-daero 550beon-gil, Saha-gu, Busan 49315, Korea","PeriodicalId":42467,"journal":{"name":"Korean Journal of Optics and Photonics","volume":"29 1","pages":"262-267"},"PeriodicalIF":0.1,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70160001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Study of Retrieving the Aerosol Size Distribution from Aerosol Optical Depths 利用气溶胶光学深度反演气溶胶粒径分布的研究
IF 0.1
Korean Journal of Optics and Photonics Pub Date : 2018-01-01 DOI: 10.3807/KJOP.2018.29.4.139
Kim Dukhyeon
{"title":"Study of Retrieving the Aerosol Size Distribution from Aerosol Optical Depths","authors":"Kim Dukhyeon","doi":"10.3807/KJOP.2018.29.4.139","DOIUrl":"https://doi.org/10.3807/KJOP.2018.29.4.139","url":null,"abstract":"본 연구에서는 250 nm와 1100 nm 사이에 있는 10개의 파장에서의 에어로졸 광학 깊이를 이용하여 에어로졸의 크기분포를 역산하는 연구를 수행하였다. 10개의 파장은 주요 대기 가스의 흡수선과 밴드를 피한 파장을 찾아서 선택하였다. 태양의 스펙트럼을 얻기 위해서 태양 추적시스템과 분광기를 구축하고 자체적으로 장치...","PeriodicalId":42467,"journal":{"name":"Korean Journal of Optics and Photonics","volume":"38 1","pages":"139-148"},"PeriodicalIF":0.1,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70159746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Polarization-maintained Single-mode 400-W Yb-doped Fiber Laser with 2.5-GHz Linewidth from a 3-stage MOPA System 3.5 ghz线宽单模400-W掺镱光纤激光器
IF 0.1
Korean Journal of Optics and Photonics Pub Date : 2018-01-01 DOI: 10.3807/KJOP.2018.29.4.159
Young Ho Park, Youngno Youn, M. Jung, C. Jun, Bong-Ahn Yu, W. Shin
{"title":"Polarization-maintained Single-mode 400-W Yb-doped Fiber Laser with 2.5-GHz Linewidth from a 3-stage MOPA System","authors":"Young Ho Park, Youngno Youn, M. Jung, C. Jun, Bong-Ahn Yu, W. Shin","doi":"10.3807/KJOP.2018.29.4.159","DOIUrl":"https://doi.org/10.3807/KJOP.2018.29.4.159","url":null,"abstract":"","PeriodicalId":42467,"journal":{"name":"Korean Journal of Optics and Photonics","volume":"111 1","pages":"159-165"},"PeriodicalIF":0.1,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70160185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Design of a Reflector for LED Light Sources with Asymmetric Light Distribution 非对称光分布LED光源反射器的设计
IF 0.1
Korean Journal of Optics and Photonics Pub Date : 2018-01-01 DOI: 10.3807/KJOP.2018.29.6.253
Jin-Hee Seo, Ye-Ji Jo, Hyun-Hwa Lee, Jae-Yeong Seo, Won-Kyoun Jun, Han-Yul Lee, Dong-Hwa Kang, M. Jung
{"title":"Design of a Reflector for LED Light Sources with Asymmetric Light Distribution","authors":"Jin-Hee Seo, Ye-Ji Jo, Hyun-Hwa Lee, Jae-Yeong Seo, Won-Kyoun Jun, Han-Yul Lee, Dong-Hwa Kang, M. Jung","doi":"10.3807/KJOP.2018.29.6.253","DOIUrl":"https://doi.org/10.3807/KJOP.2018.29.6.253","url":null,"abstract":"In this paper, we study a method of designing a reflector for LED light sources with an asymmetric light distribution. In a sports game, lighting with a symmetric distribution makes the athlete and spectators look directly at the light source","PeriodicalId":42467,"journal":{"name":"Korean Journal of Optics and Photonics","volume":"29 1","pages":"253-261"},"PeriodicalIF":0.1,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70159942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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