• The Optical Journal
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• s.160
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• pp.34-36
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• 2015

• The Optical Journal
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• s.160
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• pp.56-61
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• 2015

• Optical Science and Technology
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• v.17 no.1
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• pp.7-17
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• 2013

• The Optical Journal
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• s.176
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• pp.37-43
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• 2020

• The Optical Journal
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• s.176
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• pp.65-75
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• 2020

• Proceedings of the Optical Society of Korea Conference
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• 2009.02a
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• pp.387-388
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• 2009

Biophotonics is an emerging area in a fusion of biology and photonics, especially in advanced bioimaging, optical biosensors, photomodulation, and biochip optical read-out, and optical manipulation. This emerging area also creates many opportunities for interdisciplinary study of biology and photonics. Micro-Electro-Mechanical-System(MEMS) is an attractive technology in miniaturizing sensors and actuactors. For last decade, it has contributed to the development for active and passive small and integrated optical components in optical communication. Recently, this technology is also merging into biology for high sensitive biosensing and high resolution and fast bioimaging in small form factor. In this talk, some key advantages of small optical components and recent biophotonic MEMS achievement will be discussed for miniaturized advanced biophotonic systems.

• Korean Journal of Optics and Photonics
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• v.30 no.1
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• pp.15-22
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• 2019

$Si_3N_4$ rib-optical waveguides for evanescent-wave integrated-optical biosensors were analytically interpreted, to derive the single-mode propagation conditions. The integrated-optical biosensor structure based on two-mode interference was proposed, and the rib width and thickness and core thickness for a single-mode and two-mode waveguide (sensing region) were proposed to be $3{\mu}m$, 2 nm, and 150 nm and $3{\mu}m$, 20 nm, and 340 nm respectively. The optical characteristics of each guided-wave mode were investigated utilizing the film mode-matching (FMM) analysis.

• Journal of Sensor Science and Technology
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• v.6 no.3
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• pp.172-179
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• 1997

This paper describes a multiplexed-multivariate fiber-optic interferometric sensor system with remote sensing capability. Signal processor of the implemented sensor system is designed as a digital fringe counter that is well adapted to the signal processing of the remote fiber-optic Fabry-Perot interferometric sensor array. By summing up the reported optical data of the optical fiber, a guideline for choosing the optical effect suitable for a specific measurand is presented. As an example, a pressure sensing device that utilizes the strain-optic effect of the optical fiber by attaching it onto a stainless steel diaphragm of which diameter is 4.3 cm, is built and attached to the sensor system. The changes in optical phase difference of the fiber-optic Fabry-Perot interferometric press ure sensor while filling a water tank 2 meters high, was counted by the half-fringe counting signal processor. Test results showed that the measurement error is less than ${\pm}3.6\;cm$ over the measured range of 2 meters.

• Proceedings of the Optical Society of Korea Conference
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• 2003.07a
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• pp.196-197
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• 2003

광섬유형 센서는 전자기적 간섭에 강하고 높은 감도와 원거리 측정 등의 장점뿐만 아니라 낮은 삽입 손실, 높은 기계적인 신뢰성, 원거리 측정과 같은 장점을 가지고 있어 광통신 기술뿐 아니라 기초과학및 응용 과학분야의 계측에 활발히 이용되고 있다. 온도센서의 경우 센서의 재료가 온도에 견디는 정도에 따라 측정범위가 좌우되므로 광섬유형 센서의 경우 넓은 온도범위에서 측정이 가능하며 다양한 구조의 센서구현이 용이하다. (중략)

• Proceedings of the Optical Society of Korea Conference
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• 2003.07a
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• pp.200-201
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• 2003

광섬유 OTDR 센서는 전자기 잡음이 없으며 원거리 가시 및 다중화가 가능한 유망한 센서이다. 광섬유 내부를 진행하는 빛은 광섬유의 밀도 변화에 따라 미소한 광산란이 연속적으로 발생하게 되는데 이러한 광산란을 레일리 (Rayleigh) 광산란이라고 한다. OTDR 센서는 펄스광을 광섬유에 입사한후 되돌아오는 레일리 산란광을 측정하면서 임의의 위치에 주어지는 외란의 영향을 후방 산란광의 감소로 알아내는 센서이다. 광섬유 OTDR 센서에 관련한 연구는 다음과 같다. (중략)