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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Optics and Photonics
Journal Basic Information
Journal DOI :
Optical Society of Korea
Editor in Chief :
Volume & Issues
Volume 11, Issue 6 - Dec 2000
Volume 11, Issue 5 - Oct 2000
Volume 11, Issue 4 - Aug 2000
Volume 11, Issue 3 - Jun 2000
Volume 11, Issue 2 - Apr 2000
Volume 11, Issue 1 - Feb 2000
Selecting the target year
Trap and movement of Mie particles by using the focussed He-Ne laser beam
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 141~146
Mie particles such as polystylene latex spheres with
diameters are easily trapped and freely moved toward an arbitrary position by using the low power He-Ne laser beam focussed by the objective lens with the magnification of 40 X or 100 X. By using this technology, we can successfully arrange Mie particles in the form of the capital letter A. As a result, we can confirm the possibility of the optical tweezer that can readily trap and freely move the Mie particles. icles.
Optical and mechnical properties of
optical thin films by ion assisted deposition
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 147~151
We deposited the ion assisted
films and conventional thermal evaporated
films by using electron beam gun, and measured the optical properties and mechanical properties of the fabricated films according to the evaporation conditions. In the case of the TazOs films by oxygen ion assisted deposition with the anode voltage of 120 V, and current density of
, the refractive index exhibited 2.15 which was higher than the conventionally deposited film index 1.94 and the tensile stress exhibited
which was lower than
. This properties coincided with the optical and mechanical properties of the films deposited at the elevated substrate temperature of
. In the case of the argon ion assisted films the tensile stress was decreased but the absorption existed at the short wavelength in the visible spectral region. And all the fabricated films were found to be amorphous by the X-ray diffraction analysis. lysis.
Properties of indium tin oxide thin films annealed in vacuum
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 152~157
Post-deposition vacuum annealing effects in electron-bearn-evaporated indium tin oxide (ITO) films have been investigated by the change of transmittance, sheet resistance and crystalline structure with annealing temperature (
) and oxygen partial pressure (
) in air and vacuum. The sarnples were polycrystalline films with a preferred orientation in the (222) plan. High quality films with sheet resistance as low as 62 Q/O and transmittance over 99% (absentee layer at 500 nm) have been obtained by suitably controlling the vacuum annealing pararneters.neters.
Application of rotating polarizer method for small cellgap measurement
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 158~162
Measurement of low cell gap and retardation by using a rotating polarizer method was proposed. For more precise calculation and measurement, we applied a simple numerical calculation and a retardation film that has large retardation value of 1 ~m to measurement system. From experiments, we proved that cell gap and retardation could be measured even though the values of those are so small. small.
optical cross connects based on switchable mirrors
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 163~165
We propose a new structure of optical cross connect based on a WDM MUX/DEMUX pair and switchable mirrors. In experiment, we demonstrate the operation of the optical cross connect using an optical fiber loop mirror connected to a
optical switch as a switchable mirror.mirror.
Implementation and modeling of wavelength tunable all-optical clok recovery using a semiconductor-fiber ring laser
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 166~170
A wavelength tunable all-optical clock recovery using a semiconductor optical amplifier in a fiber ring cavity is proposed and demonstrated at the wavelength of 1530 nm to 1570 nm. A synchronized optical pulse train is recovered from 10 Gbps and 30 Gbps randomly generated optical pulse streams with injection locking technique. Also, the system responses to the perturbation and the input average power variation are analyzed by a large-signal model based on time-domain travelling wave equation. ation.
Theoretical modeling and analysis of thulium doped fluoride fiber amplifier at 1.47
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 171~178
We present a numerical model which enables to analyze
m amplification band characteristics for thulium doped fluoride fiber amplifiers. We focused on upconversion pumping scheme, thus many transitions affecting
m band amplification was considered simultaneously. Backward propagating waves and transverse mode were also considered in the model. The parameters for modeling were then acquired using published experimental data and related theories such as Judd-Ofelt theory for radiative transition, empirical energy gap law for non-radiative transition, and McCumber relations for cross-sections. The simulation showed well-matched results with experiment and internal dynamics. amics.
Optical coupling coefficients and packaging of optical transmitter module for optical subscriber
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 179~186
Optical coupling coefficients and misalignment tolerance of 155 Mbps optical transmitter module of passive alignment technology, to be usable in ATM system, B-NT (Broadband Network Termination) system, and 10 G transmission system for information super-highway networks, were calculated, compaired with it's engineer samples, and discussed. These engineer samples of -4.5 dBm maximum output power were packaged in the method of butt coupling of flat-fiber and tested reliability evaluation. Hence the cheap packaging method of optical transmitter module was researched. rched.
Analysis of parametric amplification in a semiconductor laser using perturbation theory
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 187~192
We analyze the parametric amplification by the nonlinear characteristics in a semiconductor laser using a perturbation theory and discuss its result. The parametric gain increases with increase of the pump modulation current. It is due to shift of the resonance frequency as the pump modulation current increases. However, it decreases with increase of the bias current and damping constant. Also, it needs phase matching between the pump modulation current and signal modulation current to maximize the parametric gain. The gain decreases for a large signal modulation current due to the saturation of the amplified power. power.
A study of polarized mode convertible, wavelength tunable optical filter utilizing acoustic barrier and acouxto-optic effect in
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 193~197
A polarized mode convertible, wavelength tunable optical filters with acoustic barriers and acousto-optic effect have been produced in LiNb03 substrate utilizing the Ti double diffusion technique. Polarization conversion in excess of 81 % and a spectral width of -200 kHz (-1.83 nm) were achieved at a wavelength of 1551.6 nm and RF frequencies of 173.07 kHz and 173.05 kHz for both transverse electric (TE) and transverse magnetic (lM) input polarizations, respectively. The electrical driving power was 10.97 mW and reduced to about 10% of one for an optical filter without an acoustic barrier. A linear tuning rate of 8.2 nmlMHz and sidelobe intensity of -4 dB was demonstrated. rated.
Charateristics of defect modes in two-dimensional photonic bandgap structures
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 198~201
Using the Finite-Difference Time-Domain (FDTD) method that analyzes the Maxwell equations in time domain, we simulated the characteristics of optical wave propagation and defect modes in two-dimensional photonic crystals composed of dielectric cylinders located on triangular, square, and honeycomb lattices. In particular, we investigated the properties of defect modes as the permittvity of the defects is varied. aried.
Fabrication of Er/Yb co-doped phosphate glass waveguides by potassium ion exchange
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 202~205
One step thermal potassium ion exchange process was carried out to form optical channel waveguides in an ErNb co-doped phosphate glass. Flowing oxygen gas into KN03 melt during ion exchange was effective to prevent glass surface damage that causes an increase of waveguide propagation loss. Amplification characteristics of the waveguides were evaluated at
signal wavelength with 980 om laser diode pump. A 45 mm long waveguide whose processing parameters had been optimized exhibited a small signal net gain of 7.5 dB at the launched pump power of 160 mW.160 mW.
Wavelength stabilized high power cw DFB laser module for DWDM transmission
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 206~209
A wavelength stabilized high power CW DFB LD module was designed and fabricated for use in externally modulated, Dense Wavelength Division Multiplex (DWDM) systems. A simple, compact wavelength monitoring technology using a thin solid Etalon and PD array assembly was developed for a low cost wavelength stabilized DFB LD module. Also, the excellent module have high power characteristic of 13.5 mW in CW 100 mA current injection with high optical coupling coefficient over 43%. r 43%.
Implemention of digital holographic optical memory system using hybrid coding and image compression method
Korean Journal of Optics and Photonics, volume 11, issue 3, 2000, Pages 210~217