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RISS 인기검색어
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- 저자 : 이승현(부교수) ( Seung Hyun Lee ) (검색결과 3 건)
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고출력 다중모드 반도체 레이저에 대한 단일 주파수 주입을 통한 잠금
이승현(부교수) ( Seung Hyun Lee(associate Professor) ),원기탁(조교수) ( Ki Tak Won(assistant Professor) ),김득수(부교수) ( Deuk Su Kim(associate Professor) ) 공군사관학교 2015 공사논문집 Vol.66 No.1
Because there is always interest in low-cost, reliable light sources displaying desirablespatial and spectral properties, optical injection has been widely used to explore the locking of low power, single-frequency diode laser beam into single stripe, broad area, high-power lasers. We are trying several new ideas, although there have been some previous studies. When we inject 30mW of 794nm light from a Sacher external cavity diode laser (master) into a Coherent S-79-1200C-100-Q (slave), the output changes dramatically from multimode to single mode up to a slave laser output power over 460mW. This maximum single mode power tracks the injected master laser power. The output frequency follows the master``s frequency. This light can be used to excite the Helium 33P2 state to the Rydberg states.
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이공학편 : 인문,사회계열 생도들의 물리학업성취도 조사
김득수(부교수) ( Deuk Su Kim ),원기탁(조교수) ( Ki Tak Won ),이승현(부교수) ( Seung Hyun Lee ) 공군사관학교 2015 공사논문집 Vol.66 No.2
The purpose of this research is to suggest the course of efficient physics education for the arts and social science cadets of KAFA. To obtain the end. we evaluated on the physics achievement of the arts and social science cadets aboUl force and motion using the FCI(Force Concept Inventory) queslIonnalre.According to analysis results. many cadets improved the scholar achievement to the introductory level of NewlOnian mechanics. lIowever. they have still low achievement for some concepts after learning of general physics. And we proposed the improvement plans of physics education through the analysis of misconception. We expect this research outcome to assist in effective learning by applying such outcome into physical curriculum development.
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이공학편 : 2009년 개정 고등학교 물리교과와 공군사관학교 일반물리학의 내용 비교 분석
원기탁(조교수) ( Ki Tak Won ),김득수(부교수) ( Deuk Su Kim ),이승현(부교수) ( Seung Hyun Lee ) 공군사관학교 2015 공사논문집 Vol.66 No.2
This study carries out comparative analysis helween the high school physics 1/II of 2009 revision curriculum and the general physics of KAFA. Although the educational obiectives of physics I is understanding various physical concepts qualitatively, comparative analysis for general physics is noticeablY lower than between physics II and general physics. Also considerable rate of physics 1/II are repeated simply. it should be refer to class guidance. Many ponion of physics 1/II aren``t address in general physics and il suggest 10 partial revision of that.
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