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5월 17 일 ( 목)
11:25
T2B-3 WDM 광 네트워크에서 3R 파장 변환기
의 tunability 영향 분석
장순혁, 정환석, 조윤희, 김광준(ETRI)
The effects of tunability of 3R wavelength
converters (3R-WCs) on WDM mesh network
with finite signal impairment threshold (SIT)
are presented. The blocking probability of
routing and wavelength assignment (RWA)
was calculated with the change of network
resources. We find that severe reduction of
the tuning range of 3R-WCs hardly affects
the network performance.
11:40( 초청논문)(Presentation in English)
T2B-4 다중레벨 광전송시스템에의 Coded
Modulation 기술 적용
M. Sathish Kumar, Namkyoo Park( 서울대),
Hosung Yoon(KT)
Application of a spectrally efficient coded
modulation technique called Trellis Coded
Modulation (TCM) to optical Differential
Quadrature Phase Shift Keying (oDQPSK) is
discussed. Symbol Error Rate (SER) performance
of the resultant system in the
presence of Amplified Spontaneous Emission
(ASE) noise is evaluated using the Karhunene
Loeve Series Expansion (KLSE) method.
Optical Signal to Noise Ratio (OSNR) penalty
due to first order Polarization Mode Dispersion
(PMD) effects of the proposed
scheme is also evaluated.
학술발표 T2C 사라세미나실
홀로그래피 10:40~12:10
좌장 : 전석희( 인천대)
10:40( 초청논문)
T2C-1 감소된 Look-up table을 이용한 컴퓨
터 형성 홀로그램의 고속 생성
김승철, 김은수( 광운대)
In this paper, the Reduced Look-up Table
(R-LUT) is proposed to increase the speed
of CGH generation and to reduce the space
required to store a pre-computed table.
From some simulation result, the proposed
method is 48.8 times faster than the
traditional diffraction-based method. And
thememorysizeusedinproposedR-LUT
method is 271 times smaller than the
memory size used in LUT method.
11:10
T2C-2 주입 잠김된 두 개의 단일 모드 페브리
페롯 레이저를 이용한 높은 점별비를 갖는 전
광 플립플롭
조정식, Nguyen Le Hoang, 정용덕,
원용협
(ICU)
An all-optical flip-flop with inverted output
is presented, which is realized based on the
optical bistability of an injection-locked
single-mode Fabry-Perot laser diode (FP-LD).
The flip-flop with separate optical set and
reset inputs has an on-off contrast ratio of
over 35 dB.
11:25
T2C-3 SiOC박막 위에 이온빔 조사에 의한 액
정의 수직배향
손필국, 김재창, 윤태훈( 부산대)
We investigated alignment of liquid crystal
on amorphous SiOC film surfaces deposited
at the room temperature and irradiated by
the atomic beam. We found by the electrostatic
force microscopy data that the vertical
alignment can be achieved when the electric
potential roughness is high at the SiOC film
surface. We suggest that Coulomb interaction
between liquid crystal molecules and the
ionized film surface has a dominant effect
upon liquid crystal alignment on inorganic
film surfaces by the low-energy ion beam
exposure.
11:40
T2C-4 홀로그래픽 응용을 이한 반사형 포토폴
리머의 광학적 특성
신창원(( 주) 프리즘테크), 김남( 충북대),
길상
근수원대 ( ), 이권연순천대 ( )
In this paper, we investigated optical properties
of a photopolymer OminDex 700serise
for holographic application at the 532nm
wavelength. To achieve the high diffraction
efficiencies in optical system, we measured
a exposure energy and a incident angle for
a maximum diffraction efficiency of the
material. Maximum diffraction efficiency was
measured at beam intensity ratio of 1:1. The
performance and the optical characteristics
of the material will discussed in detail.
11:55
T2C-5 포토폴리머를 이용한 편광 다중화 홀로
그래피
정현섭, 김남( 충북대), 신창원( 프리즘테크),
김
은경( 연세대)
In order to record the polarization gratings,
polarization-sensitive materials, in which
linear birefringence is induced by irradiating
the polarized light, are necessary. In this
paper, we investigated polarization properties
of a photopolymer. We checked orthogonal
and independence of laser. The value of the
photoinduced linear polarization had effect
on diffraction properties in the holographic
gratings.
학술발표 T2D 도래세미나실
광섬유기반소자 10:40~12:10
좌장 : 안준태(ETRI)
10:40( 초청논문)
T2D-1 나선형 장주기 광섬유 격자의 제작과
응용
신우진, 유봉안, 오경환, 이영락, 엄태중,
노영
철, 고도경, 이종민(APRI)
We report a new method of fabrication of
helicoidal long-period fiber gratings by
twisting a single mode fiber with CO2 laser
beam. Detailed fabrication method and the
operation principles of proposed helicoidal
long period fiber gratings are described and
the transmission characteristics were experimentally
demonstrated. Also, we have
developed a new type of all- fiber band
rejection filter consists of helicoidal longperiod
fiber grating pair of opposite helicities,
which provides highly flexible spectral control
over the rejection bandwidth. The proposed
device enables the unique rejection bandwidth
tuning over more than 14 nm at the
rejection level of 15 dB, with low insertion
loss and polarization dependent loss by
adjusting torsion stress.
11:10
T2D-2 Holey 광섬유 기반 장주기 격자의 각도
에 따른 구부림 특성에 관한 연구
송수호, 김길환, 조형수, 배준기, 이상배(KIST),
한영근, 정제명( 한양대), 정창현, 오치환,
강희
전( 옵토매직)
We discuss the bending properties of
long-period fiber gratings (LPFGs) written
in holey Fibers depending on axial rotation
angle. The center wavelength of HF-based
LPFGs is shifted into the shorter wavelength
asthebendingcurvatureincreases.Wealso
investigate the dependence of the bending
characteristics of HF-based LPFGs on axial
rotation angle.
11:25(Presentation in English)
T2D-3 Stable multiwavelength Erbium-doped
fiber laser at room temperature
Guoyong Sun, Daeseung Moon, Youngjoo
Chung(GIST)
A sinusoidal phase modulator is inserted in
the linear cavity, which suppresses the
mode competition due to the homogeneous
line broaden in Erbium-doped fiber. Simultaneous
multi-wavelength lasing is observed
with 0.45 nm intervals defined by the
periodical filter. There are 9 lasing lines in
power differences less than 10 dB and the
side-mode suppression ratio is higher than
25 dB.
11:40(Presentation in English)
T2D-4 Fabrication of core-mode blocker
using micro air bubble in the hollow optical
fiber
전종운, 오경환( 연세대), 김준기, 정용민(GIST),
신우진, 고도경, 이종민(APRI)
We have fabricated a new wavelength
dependent core-mode blocker using micro
air bubble. Micro air bubble have made by
distinctive collapsing of air hole in hollow
optical fiber in optimal fusion splicing conditions.
In addition, the wavelength dependence
of transmission spectra was associated with
thebubblesize.
11:55
T2D-5 1310 nm 파장에서 9.6 dB 이득을 갖는
Bi 첨가 광섬유 증폭기
서영석, 홍성기, 임창환(KAERI), Yasushi Fujimoto,
Masahiro Nakatsuka(ILE, Osaka Univ., Japan)
A 9.6 dB gain is observed at 1310 nm in
a 5.0-cm long bismuth-doped fiber. The
excellent thermal and mechanical properties
of silica glass are very attractive for a
high-average-power laser medium. We have
been developing a new laser medium based
on silica glass, and we have discovered a
new infrared emission from a bismuth-doped
silica glass.
12