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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
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Volume & Issues
Volume 25, Issue 6 - Dec 2014
Volume 25, Issue 5 - Oct 2014
Volume 25, Issue 4 - Aug 2014
Volume 25, Issue 3 - Jun 2014
Volume 25, Issue 2 - Apr 2014
Volume 25, Issue 1 - Feb 2014
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Calculation of Multiple Scattering in Water Cloud and Application in Remote Measurement of Cloud Physical Properties
Kim, Dukhyeon ; Park, Sunho ; Choi, Sungcheol ;
Korean Journal of Optics and Photonics, volume 25, issue 1, 2014, Pages 1~7
DOI : 10.3807/KJOP.2014.25.1.001
Multiple scattering effects in cloud are important error sources of the Mie scattering Lidar inversion method, which should be measured to correct the Lidar equation in single wavelength Mie Lidar. We have calculated the multiple scattering effects in liquid water clouds by using a Monte Carlo method, and we have applied these multiple scattering effects in measuring water cloud effective size and LWC (Liquid Water Content). When cloud effective size is less than
, we can easily extract cloud effective size and LWC by using two wavelength Lidar such as extinction coefficients measured at 355nm and 1064nm. For a larger size cloud, we can find that saturated degree of linear polarization is strongly correlated with cloud effective size, LWC, and extinction coefficients. From these correlations we know that we can measure LWC and cloud effective size if we use single wavelength Rotational Raman Lidar and Mie scattering polarization Lidar.
Non-Paraxial Diffraction Effect of High NA Objectives
Lee, Jong Ung ;
Korean Journal of Optics and Photonics, volume 25, issue 1, 2014, Pages 8~13
DOI : 10.3807/KJOP.2014.25.1.008
By using finite ray-tracing and curve fitting, a numerical method to determine the non-paraxial pupil function of a high-NA objective is presented. MTF degradations caused by the non-paraxial diffraction effect are analyzed for on-axial imaging of a far-infrared objective and aberration-free ellipsoidal mirror system. The ellipsoidal mirror system has the same paraxial specifications as the far-infrared objective.
Converting a Lens to Its Equivalent as Referenced to Pupil Imaging
Bang, Hyun Jin ; Lee, Jong Ung ;
Korean Journal of Optics and Photonics, volume 25, issue 1, 2014, Pages 14~20
DOI : 10.3807/KJOP.2014.25.1.014
The equivalent of a thick lens is a lens which has the same power of refraction and paraxial imaging characteristics for a reference ray, but with a different axial thickness. In this study, thick lenses of an optical system were converted to their equivalent lenses referenced to pupil imaging. Aberration changes due to the lens conversion were compared to the general equivalent lens conversion referenced to object imaging.
Super Multi-view Display Method using Pin-hole Array
Byeon, Jin-A ; Kwon, Ki-Chul ; Erdenebat, Munkh-Uchral ; Park, Jae-Hyeung ; Kim, Sung-Kyu ; Kim, Jong-Jae ; Kim, Nam ;
Korean Journal of Optics and Photonics, volume 25, issue 1, 2014, Pages 21~28
DOI : 10.3807/KJOP.2014.25.1.021
In this paper a Super Multi-view display method using a pinhole array with full parallax was proposed. The proposed method was simulated and its parameters analyzed. Also, the distribution and irradiance of light through each pinhole on the retina receiver, according to the change of crystalline lens focal length, were found by simulation. As a result, an image free of blurring was obtained while the crystalline lens focused on the depth plane of the three-dimensional image created by the imaging lens.
Systematic Error Correction in Dual-Rotating Quarter-Wave Plate Ellipsometry using Overestimated Optimization Method
Kim, Dukhyeon ; Cheong, Hai Du ; Kim, Bongjin ;
Korean Journal of Optics and Photonics, volume 25, issue 1, 2014, Pages 29~37
DOI : 10.3807/KJOP.2014.25.1.029
We have studied and demonstrated general, systematic error-correction methods for a dual rotating quarter-wave plate ellipsometer. To estimate and correct 5 systematic error sources (three offset angles and two unexpected retarder phase delays), we used 11 of the 25 Fourier components of the ellipsometry signal obtained in the absence of an optical sample. Using these 11 Fourier components, we can determine the errors from the 5 sources with nonlinear optimization methods. We found systematic errors
) are more sensitive to the inverted Mueller matrix than retarder phase delay errors (
) because of their small condition numbers. To correct these systematic errors we have found that error of any variety must be less than 0.05 rad. Finally, we can use the magnitudes of these errors to correct the Mueller matrix of optical components. From our experimental ellipsometry signals, we can measure phase delay and the rotational angular position of its fast axis for a half-wave plate.
Two-Wavelength Lasers Based on Oversized Rib Polymer Waveguide Bragg Reflectors
Sung, Chi-Hun ; Kim, Jun-Whee ; Shin, Jin-Soo ; Oh, Min-Cheol ;
Korean Journal of Optics and Photonics, volume 25, issue 1, 2014, Pages 38~43
DOI : 10.3807/KJOP.2014.25.1.038
An external cavity laser supporting two wavelengths is demonstrated by incorporating polymer waveguide Bragg reflectors and a superluminescent light-emitting diode. An oversized rib waveguide structure and Bragg gratings are designed by using the effective-index and transmission-matrix methods. Bragg gratings with different periods are inscribed on a polymer waveguide through double-exposure laser interferometry. In order to tune the cavity loss affected by the reflectivity of Bragg gratings, a Bragg reflectors with varying length is incorporated. Two-wavelength-mode lasing is achieved for the device consisting of 2-mm long, 537-nm period gratings and 2.2-mm long, 540-nm period gratings; the lasing wavelengths are 1554 nm and 1564 nm, with an output power close to 0 dBm, a 20-dB bandwidth of 0.2 nm, and a side-mode suppression ratio of 45 dB.
Optical Parametric Amplification in Cerenkov-pump Configuration in a Planar Waveguide
Suh, Zung-Shik ;
Korean Journal of Optics and Photonics, volume 25, issue 1, 2014, Pages 44~49
DOI : 10.3807/KJOP.2014.25.1.044
We have analyzed the amplification of a signal wave in the optical parametric interactions of the pump, signal, and idler waves in planar waveguides, with the pump wave being Cerenkov radiation. Based on the coupled-mode theory, we have derived the first-order coupled-mode differential equations for no pump depletion. The equations can easily be solved numerically. The approximate analytical and numerical solutions of the equations show that the signal wave can be amplified parametrically.