• Korean Journal of Optics and Photonics
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• v.13 no.5
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• pp.421-424
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• 2002

By using SOA (Semiconductor Optical Amplifier) based devices, an all-optical half adder has been successfully demonstrated at 10 Gb/s. All-optical XOR and AND gates are utilized to realize SUM and CARRY. Since SUM and CARRY have been simultaneously realized to form the all-optical half adder, complex calculation and signal processing can be achieved.

• Proceedings of the Optical Society of Korea Conference
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• 2007.07a
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• pp.327-328
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• 2007

• Proceedings of the Korean Society of Potoscience Conference
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• spring
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• pp.18-18
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• 1998

• Korean Journal of Optics and Photonics
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• v.14 no.1
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• pp.8-11
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• 2003

For the first time to our knowledge we have developed compact mechanically-induced long-period fiber grating devices which have an excellent tunability in the center wavelength and the depth of the notch. The compactness and ease to tune allow us to include them in other optical devices or systems. The devices were characterized by measuring their transmission spectra with different grating periods and applied pressures. We have also demonstrated the EDFA gain flattening using the mechanically-induced long-period fiber grating devices.

• Ceramist
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• v.21 no.1
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• pp.64-79
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• 2018

Recent years, OLEDs have been progressed intensively and been widely applied to Display and Lighting industry,Almost 100% internal quantum efficiency was achieved by developing new materials and structure optimization. However, external quantum efficiency was still low due to total internal reflection of light inside OLED devices and absorption of light at the surface of metal electrode. In order to improve external quantum efficiency of OLED devices, various kinds of optical functional structures were introduced to inside and outside of OLED devices to increase light extraction efficiency. In this paper, various efforts to apply optical functional structures in OLED devices were reviewed and way to improve light extraction efficency of OLED devices were discussed.

• Polymer Science and Technology
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• v.18 no.2
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• pp.159-166
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• 2007

• Photonics industry news
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• s.60
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• pp.38-57
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• 2010

• Proceedings of the Optical Society of Korea Conference
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• 1990.07a
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• pp.22-25
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• 1990

• Proceedings of the Optical Society of Korea Conference
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• 2007.07a
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• pp.231-232
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• 2007

• Proceedings of the Optical Society of Korea Conference
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• 2001.08a
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• pp.62-63
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• 2001