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5월 17 일 ( 목)
device will serve as a key element for mobile
projection display system which requires
compact and cost-effective projection module.
학술발표 T1D 도래세미나실
나노/ 바이오포토닉스 I 09:00~10:30
좌장 : 김동현( 연세대)
09:00( 초청논문)
T1D-1 2차원 광자 결정에서 헤테로 구조와 나
노공진기로의 응용
송봉식( 성균관대, Kyoto Univ.), T. Asano, S.
Noda(Kyoto Univ., Japan)
In this presentation, we show the fundamentals
of heterostructures in two-dimensional
photonic-crystal (PC) slabs and their applications
to ultrahigh-Q nanocavities. We
show experimentally photonic nanocavities
with ultra-high Q factors (~1,200,000) by
constructing photonic double heterostructures.
These nanocavities are important not only
in the development of various photonic
applications but also for advancing our
knowledge of photonic heterostructures.
09:30( 초청논문)
T1D-2 생체내 비침습성 형광분광 진단 기술
한승희(KERI)
The fluorescence emanating from a turbid
medium contains information about scattering,
absorption and the intrinsic fluorescence
(fluorescence only due to fluorophores). We
conducted experiments to examine the
influence of scattering and absorption on
the experimentally measured fluorescence
of a turbid medium such as biological
tissue. Therefore, we acquired fluorescence
and reflectance spectra of tissue phantoms,
human oral tissue and colon tissue with a
wide range of scatterer and absorber concentrations.
By applying a photon migration
model, which uses the scattering and absorption
information contained in reflectance
spectra to remove their distortion also
present in fluorescence spectra, we extract
the intrinsic fluorescence of these tissue
models. We achieved excellent agreement
between modeled and actual intrinsic fluorescence
spectra.
10:00
T1D-3 광 산란 감소 물질을 이용한 스페클 영
상의 대조도 향상에 관한 개선 연구
손태윤, 윤진희, 정병조( 연세대)
This paper aims to enhance the contrast of
laser speckle images. To achieve the aim,
we suggest a new method using optical
clearing agent, glycerol. The glycerol was
topically applied on the porcine skin sample
under which saline solution flow through a
tubing in a constant speed. We observed
the enhancement of optical clearing of skin
and of the contrast of speckle image due
to the reduction of scattering properties.
10:15(Presentation in English)
T1D-4 Two-dimensional photonic crystal
nanocavity with InAs quantum dots
장현주, 김세헌, Yoanna Nowicki, Jean-Michel
Gerard, 이용희(KAIST)
We have designed and fabricated two
dimensional photoni crystal nanocavity with
InAs quantum dots, which have a good
vertical beaming property. We have performed
the micro-photoluminescence measurement
at liquid-nitrogen temperature, which shows
strong Purcell enhancement>10.
학술발표 T2A 한라홀
광도파로 광소자 10:40~12:10
좌장 : 신동수( 한양대)
10:40( 초청논문)
T2A-1 Bragg 격자 포함 고분자 광도파로의 열
광학 효과를 이용한 가변분산보상
주정진, 김민수, 박승구(ETRI), 이명현(
성균관
대), 이형종, 노영욱(( 주) 켐옵틱스)
We demonstrate a thermo-optic tuning technique
of chirp rates with uniform and chirped
Bragg gratings embedded in polymeric waveguides
providing polarization insensitive
reflection band and large thermo-optic
coefficient. Linear temperature gradients
applied along the waveguides induce the
effective refractive index gradients of guided
modes that lead to chirps in the uniform
grating, and to change chirp rates in the
chirped grating. By controlling the temperature
gradients along the 3 cm waveguides,
dispersions in the range of ±200 ps/nm are
tuned within the temperature gradient less
than 12˚C/cm. The large dispersion tuning
range with the small temperature gradient is
a unique property of the polymeric waveguides
due to the large thermo-optic coefficient.
11:10
T2A-2 유연성 기판 브래그 반사 광도파로 소자
김경조, 이정아, 오민철( 부산대)
The device has been fabricated on a flexible
polymer substrate utilizing a post lift-off
process which could provide excellent uniformity
of grating pattern on a plastic film.
The grating pattern is formed by exposing
the laser interference on a photoresist then
inscribed by O2 plasma etching. Uniformity
of grating pattern is improved by using
black matrix polymer which reduces the
Moiré pattern occurred by the reflected
wave passed through thick polymer layers.
The selective adhesion property of SU-8
material for Au and Si surfaces is utilized to
prepare 100-um thick plastic substrate. Single
mode waveguide is fabricated on the plastic
substrate using the polymer materials with
refractive indices of 1.455 and 1.430 for the
core and the cladding layers, respectively.
The Bragg grating on plastic substrate does
not show any degradation on its spectral
response compared to reference sample
made on silicon wafer.
11:25
T2A-3 집적광학 채널 선택 마이크로웨이브 대
역통과 필터
김건덕, 경운환, 이상신( 광운대)
A photonic microwave (MW) channel selective
filter was demonstrated incorporating a 1x2
switch based on two tunable polymeric
resonators with different free spectral ranges.
When the channel centered at 10 GHz was
chosen, the extinction ratio was ~30 dB, the
bandwidth 1 GHz, and the electrical power
consumption 4.1 mW. And for the other
channel located at 20 GHz, we have achieved
the extinction ratio of ~30 dB, the bandwidth
of 2 GHz, and the required power of
8.0 mW. Finally the crosstalk between the
selected and blocked channels was higher
than 24 dB.
11:40
T2A-4 폴리머기반의 파장 가변 결합 링 반사
기의설계및제작
이태형, 이동현, 정영철( 광운대), 박준오(LGS)
A widely tunable coupled-ring reflector
(CRR) based on planar polymer waveguide
is fabricated and the characteristics are
measured. The ring radii for two coupled
rings are designed to be slightly different to
achieve wide tuning using Vernier effect.
Strong reflections are observed at the wavelength
at which both rings are resonant.
Wide tuning is achieved using low current
level as small as a few tens mA.
11:55
T2A-5 Ti:PPLN 도파로를 이용한 Solc 필터의
도파모드 특성 연구
이영락, 유난이, 기철식, 고도경, 유봉안,
신우
진, 엄태중, 노영철, 이종민(GIST, APRI)
The Solc filtering characteristics were investigated
according to waveguide-mode condition
in a periodically poled Ti:LiNbO3 (Ti:PPLN)
waveguide. The quality of the quasi-phasematching
(QPM) grating and the waveguide
was measured by second-harmonic generation
and low-finesse method. We have observed
thesingleandthedualwavelengthfiltering
in the Solc filter depending on waveguidemode
and analyzed various filtering behaviors.
학술발표 T2B 봉아세미나실
광네트워크 I 10:40~12:10
좌장 : 박수진(KT)
10:40( 초청논문)
T2B-1 ASON/GMPLS 기반 광 네트워크의 제
어및관리기술
김영화(ETRI)
ASON/GMPLS 기반 광 네트워크에서 효과적
인제어관리위한주요제어및관리기술을
・
살펴본다. 또한,
이들 기술에 대한 표준화 상황
과연구개발및응용사례를검토하고국내
・
광 네트워크의 연구・개발을 위한 추진 방향을
제안한다.
11:10
T2B-2 브라그 격자를 이용한 파장 가변형 광
전송기의 파장 초기화 방법
이지현, 윤현호, 박만용, 김병휘(ETRI)
We discuss wavelength initialization method
for the Bragg-grating based tunable external
cavity laser that has been developed for its
use in the WDM-PON. In this paper, we
propose a novel, but simple method of
wavelength initialization, without using lookup
table. This proposed method provides the
accuracy such that the wavelengths are
initialized within 0.5 nm from the designated
ones, which is enough to be used in the
WDM-PON with 200GHz wavelength spacing.
11