• Proceedings of the Optical Society of Korea Conference
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• 2003.02a
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• pp.4-4
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• 2003

Diffractive- and micro-optics technology Provides new degrees of freedom for the design and optimization of optical systems. In this talk emphasis will be placed on recent advances in the design and fabrication of precision, micro- structured optical elements and their applications in the optical telecommunication, vision-care, illumination and display markets. (omitted)

• Journal of the Optical Society of Korea
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• v.14 no.4
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• pp.326-332
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• 2010

We review the research on specialty fiber couplers with emphasis placed on the characteristics that make them attractive for biomedical imaging, optical communications, and sensing applications. The fabrication of fiber couplers has been carried out with, in addition to conventional single mode fiber, various specialty fibers such as photonic crystal fiber, double clad fiber, and hole-assisted fiber with a Ge-doped core. For the fiber coupler fabrication, the side polishing and the fused biconical tapered methods have been developed. These specialty fiber couplers have been applied to optical coherence tomography, fluorescence spectroscopy, fiber sensors, and optical communication systems. This review aims to provide a detailed statement on the recent progress and novel applications of specialty fiber couplers.

• Journal of the Optical Society of Korea
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• v.5 no.3
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• pp.110-116
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• 2001

Recently observed dark resonance phenomena is solids are reviewed and discussed for potential applications to high-resolution coherence spectroscopy. in an inhomogeneously broadened system, a new type of high-resolution spectroscopy based on electromagnetically induced transparency is demonstrated.

• Proceedings of the Optical Society of Korea Conference
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• 1989.06a
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• pp.107-115
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• 1989

A 200 W industrial Nd:YAG laser was developed and its weding applications were investigated. The important factors in designing of an industrial Nd:YAG laser were analyzed and special sedign features were explained. Also, the performance of laser weldings of Zircaloy-4, stainless steel and fine thermocouples was presented.

• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.379-382
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• 2004

Microoptics has become the key technology in liquid crystal display systems due to its capabilities of miniaturization and design flexibility. We successfully demonstrate five different microoptical components for enhancing the image quality, providing better functions, increasing light efficiency, and generating 3D images in LCD applications.

• Proceedings of the Optical Society of Korea Conference
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• 2003.07a
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• pp.26-27
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• 2003

A wide variety of devices and systems exist whose main function is to generate an image. These devices and systems are used for many different purposes and find applications in many different walks of life. We are all very familiar with some of these systems such as the photographic camera (that can produce a permanent record of a scene on sensitized sheet material) and the television set (that can receive a suitably coded electromagnetic signal broadcast through space and convert it into an image). (omitted)

• ETRI Journal
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• v.23 no.3
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• pp.106-110
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• 2001

Subpicosecond all-optical switching method based on the simultaneous two-photon coherence exchange is proposed and numerically demonstrated. The optical switching mechanism is based on the optical field induced dark resonance swapping via nondegenerate four-wave mixing processes. For potential applications of ultrafast all-optical switching in fiber-optic communications, 10-THz channel number independent quantum router is discussed.

• Journal of Information Display
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• v.7 no.4
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• pp.5-8
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• 2006

The optical structures and rigorous electromagnetic modeling of OLEDs will be discussed of first and then their applications in analyses and designs of various advanced OLED structures, e.g. microcavity OLEDs, tandem OLEDs and top-emitting OLEDs etc., will be reported.

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.229-232
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• 2006

General discussions of the optical structures and rigorous electromagnetic modeling of OLEDs will be first given, and then their applications in analyses and designs of various advanced OLED structures, e.g.microcavity OLEDs, tandem OLEDs and top-emitting OLEDs etc., will be reported.

• Journal of the Korean Society for Precision Engineering
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• v.27 no.3
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• pp.33-40
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• 2010

Multizeros(multiple order zeros) optical beams which belong to the Laguerre-Gaussian beams, have rotational phase and conically-shaped amplitude structures around multizeros points in their phase and amplitude profiles, respectively. Especially, they have their own characteristics that the multizero points do not vanish over free-space propagation. Therefore, they are expected to be adequate for the applications of long-range optical measurement by using their multizero points as optical markers for the deformation sensing. In this paper, fundamental properties of multizeros optical beams for long-range optical measurement applications are investigated and clarified. In particular, the mathematical investigations are described on the characteristics of multizeoros optical beams such as (1) separation of a multizero into isolated single order zeros, (2) topological charge of zeros distribution which are induced by superposing them. And also the outline of a fundamental experiment and its result are explained briefly.