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5월 17 일 ( 목)
도두세미나실
POSTER SESSION I 15:50~17:20
TP-1 거울이나 FBG를 사용한 Brillouin 산란
센서 시스템의 측정시간
이문희, 심운용, 이호준( 호서대)
A stimulated Brillouin scattering sensor
system with reflector at the end of test fiber
is proposed and analyzed. A reflector same
as a mirror for the reflection of pump and
prove lights or FBG(fiber Bragg grating) for
that of prove light only are compared. The
method to increase the performance is
introduced.
TP-2 펄스-펄스 레이저를 사용한 Brillouin
OTDA의 최대측정거리
홍용현, 이호준( 호서대)
A theoretical study about Brillouin optical
time-domain analysis (BOTDA) using two
pulse lasers is performed. Even though a
point detection is made for a pump pulse
period, the dynamic range performance of
BOTDA using two pulse lasers is approximately
5dB more than that using a pulse
and a CW laser.
TP-3 다중-단일모드 광섬유 변환기 특성 해석
박선옥, 박규하, 양병철, 조경기, 김광택(
호남
대), 백세종, 임기건( 전남대)
The coupling and propagation characteristics
of the multi-to-single mode fiber converter
has been investigated using the beam
propagation method. The core diameters of
thicker end and thinner end are assumed to
be 50 μm and 8μm, respectively. The effect
of lateral misalignments and optical beam
size on the coupling efficiency has been
analyzed. The numerical analysis shows
that the device improve the lateral misalignment
tolerance compared to straight single
mode fiber.
TP-4 다항식 알고리즘을 이용한 광섬유 온도
센서의 선형 복조
박형준, 송민호( 전북대), 이준호( 호서대)
We proposed a polynomial fitting algorithm
with Fabry-Perot ITU filter for the nonlinear
compensation in a MEMS tunable wavelength
filter. From experimental results, the
proposed method has shown constant
accuracy in FBG sensor system without
scanning range of MEMS filter, reducing
linearity error between the polynomial fitted
FBG sensors and reference thermocouple
down to ~ 0.176 %.
TP-5 하이브리드 간섭계를 이용한 광섬유 스
트레인 센서
박형준, 송민호( 전북대)
A fiber-optic strain sensor was proposed by
using a hybrid laser interferometer, a
Michelson and a Mach-Zehnder combined.
For the demodulation of strain, we used
quadrature sampling with zero-crossing
triggers and an accurate and fast phase
demodulation is accomplished without parameter
control of reference trigger.
TP-6 초고속 광 송수신 모듈용 Lensed Fiber
의 제작과 특성
김준형( 전남대), 이상필( 이상테크), 이현용(
전
남대)
Lensed fibers offer a convenient way to
improve coupling between optical fibers
and waveguide devices, laser diodes or
photo diodes. A pair of optic fibers can be
optically coupled by forming lenses at the
ends of the optical fibers and positioning
the lenses substantially in alignment and at
approximately a predetermined spacing. In
this paper, manufactured lensed fiber using
arc discharge method. The coupling efficiency
and alignment/fabrication for optical transceiver
module to lensed fiber coupling is also
measured.
TP-7 광섬유 내의 유도 브릴루앙 산란광을 이
용한 실시간 온도 모니터링에 관한 연구
황경준, 이현룡, 염경태, 김관규, 박종현,
김용
갑원광대 ( )
This study is an application field by using
optical fiber. The system to measure sBs
from optical fiber is designed, So it can be
used as a temperature sensor. by using
frequency shift, resulting from temperature
changes. the frequency shift is checked by
changing temperature from 25℃ to 69℃
with chamber in the laboratory and using
40Km optical fiber. is's also measured by
varying the length of optical fiber The
program to do the real-time monitoring and
analyze the measured data is created to find
accurate frequency. It can be used as an
optical fiber sensor, which is capable of
measuring temperature and distance by
using sBs.
TP-8 다파장 라만 광섬유 레이저 구현을 위한
비대칭라만공진기
임영은, 박창수(GIST), 한수욱, 김동환(KOPTI)
We report a novel Raman fiber laser emitting
three output wavelengths using an asymmetrical
Raman resonator consisting of
broadband chirped fiber Bragg grating (CFBG)
reflector and Germano-silicate Raman fiber.
TP-9 Glasses containing lead chalcogenide
quantum dots for fiber-optic amplifiers
Jong Heo, Chao Liu(POSTECH)
Semiconductor nanocrystals (Quantum dots)
have many unique electronic and optical
properties induced by the quantum confinement
effects when the size of nanocrystals
is comparable or smaller than the
Bohr exciton radii. Unlike II-VI semiconductor
QDs, those made of IV-VI lead chalcogenides
such as PbS, PbSe and PbTe, have narrow
bandgap energies and large exciton Bohr
radii. Thus, this type of quantum dots is
important for the fundamental study of
strong quantum confinement effect, which
can not be realized by other quantum dots
made of wide bandgap semiconductors.
Furthermore, effective bandgap can be tuned
from Mid-IR to visible range. Thus, quantum
dots made of lead chalcogenides have
potentials for tunable IR-lasers, broadband
amplifiers and solar cells. This works reports
optical properties and potential applications
of lead chalcogenide quantum dots embedded
in glasses. Quantum dots were precipitated
through heat-treatment, and its size was
controlled by changing the heat-treatment
condition such as heat-treatment temperature
and time. Optical properties of lead chalcogenide
quantum dots thus prepared were
characterized by absorption and luminescence
spectroscopy. Tunable absorption and emission
between 1~2 μm was achieved, and full
width of half maximum (FWHM) intensity
was of >150 nm. Potentials for broadband
optical amplification will be discussed.
TP-10 금나노입자가함유된광섬유모재의
TEM 분석과 광흡수 특성
주성민,PramodR.Watekar,
한원택(GIST),
강성구, 김철진( 경상대), 정준기( 창원대)
Optical fiber perform incorporated with Au
metal nano-particles in the core was manufactured
using TEOS as a reduction agent
during MCVD with solution doping process.
The formation of Au metal nano-particles
with the average size of 8 nm in the perform
was confirmed by TEM analysis. The absorption
band at 350~550nm
and the peak
at 665nm
are attributed to the Au ions and
Au metal nano-particles present in the
perform, respectively.
TP-11 TEOS의 첨가가 Au-doped광섬유의
광학적 비선형성에 미치는 영향
주성민,PramodR.Watekar,AoxiangLin,
한
원택(GIST), 정혜정, 정채환, 부성재(KITECH)
Optical fiber doped with Au nano-particles
was manufactured by using TEOS as a
reduction agent in Au containing doping
solution during MCVD process. The absorption
peak appeared at 490 nm was attributed to
the surface plasmon resonance of the
incorporated Au nano-particles in the core,
and the nonlinear refractive index, n2, of the
fiber was found to be 2.96 ~1.27×10-16
m2/W at the pump power from 12 to 100
mW.
TP-12 청색 광양자테 레이저의 제작
김영천, 김승식, 장영흡, 권오대( 포항공대)
The PQR laser with ultra-low threshold
current and sharp discrete multei-mode
properties can outdo conventional LEDs.
We have confirmed many advantages of low
injection, high efficiency, high frequency
PQR arrays over the conventional LEDs. We
also extended our PQR work to blue wavelength
regions. To be specific, we fabricated
blue PQR arrays using the GaN wafer with
N type AlGaN/GaN DBRs for higher reflectivity.
The present preliminary studies sere
encouraginginthatthebluePQRregionis
still much brighter than the LED background
region. We will soon get more inproved
characteristics if we fabricate blue PQRs
from GaN wafer with properly grown DBRs
and without sapphire substrate.
TP-13 표면 플라즈몬 이미징을 위한 평판 집
적광학계
박우제, 송석호, 신동호( 한양대)
Most of the existing SPR(surface plasmon
resonance) image processing systems employ
bulky optical components. These systems
are often required precise alignment and
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