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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 23, Issue 6 - Dec 2012
Volume 23, Issue 5 - Oct 2012
Volume 23, Issue 4 - Aug 2012
Volume 23, Issue 3 - Jun 2012
Volume 23, Issue 2 - Apr 2012
Volume 23, Issue 1 - Feb 2012
Selecting the target year
An Undergraduate Level Polarimeter and Specific Rotation at 543 nm of Sucrose
Jung, Semin ;
Korean Journal of Optics and Photonics, volume 23, issue 6, 2012, Pages 241~245
DOI : 10.3807/KJOP.2012.23.6.241
Measurements of the optical activity become very important issues in fields related to polymers, optical communications, astronomy, physics and many more. Hence it need to introduce this subject in our regular curriculum. In this experiment, an inexpensive, reliable, motorized polarimeter system which is suitable for undergraduate courses is constructed with PASCO's well-known Science Workshop 750 and a rotational motion sensor and light sensor, and the system is presented along with its experimental formulas. After responsivity of this system was checked by a half wave plate, and some repetitive experiments with 30% sucrose solution at 543.8 nm were performed. Comparing the experimental result with two calculated values from CRC data showed that the specific rotation of the sucrose sample could be strongly suggested to be around +76 deg.cc/g.dm and it was an amply acceptable result for most undergraduate level courses.
Noise Loading Analysis using Volterra Kernels to Characterize Fiber Nonlinearities
Lee, Jong-Hyung ;
Korean Journal of Optics and Photonics, volume 23, issue 6, 2012, Pages 246~250
DOI : 10.3807/KJOP.2012.23.6.246
We derive analytical expressions for the output spectral density and the noise power
in noise loading analysis using Volterra kernels to characterize fiber nonlinearities. The bandwidth of the input noise source has little effect on
, but the power of the input noise source and the dispersion parameter value of the fiber have a significant effect on
. The Volterra method predicts
= 30 dB/decade, which agrees very accurately over a wide range of fiber parameters compared with the numerical results by the split-step Fourier method. Therefore the Volterra method could be useful to predict the performance of a dense WDM system when we plan to upgrade fiber or increase signal power.
A Study on Two-wavelength Digital Holography Using the Fresnel-Bluestein Transform
Shin, Sanghoon ; Kim, Doocheol ; Yu, Younghun ;
Korean Journal of Optics and Photonics, volume 23, issue 6, 2012, Pages 251~254
DOI : 10.3807/KJOP.2012.23.6.251
Dual-wavelength holography has a better axial range than single-wavelength holography, allowing unambiguous phase imaging. The size of a reconstructed image depends on the reconstruction distance and wavelength. The two phase image sizes of different wavelength holograms should be the same in order to apply dual-wavelength holography. The Fresnel-Bluestein transform method is proposed to eliminate the dependence on the reconstruction distance and wavelength. We found that the Fresnel-Bluestein transform is very useful for making different reconstructed image sizes experimentally. Also we applied the Fresnel-Bluestein transform to make the same reconstruction image size in dual wavelength holography.
Display System on a Tabletop for Two Viewers
Yoon, Ki-Hyuk ; Kim, Sung-Kyu ;
Korean Journal of Optics and Photonics, volume 23, issue 6, 2012, Pages 255~263
DOI : 10.3807/KJOP.2012.23.6.255
In this paper, we designed a tabletop display which enables two viewers each to see a different image simultaneously within his/her defined viewing zone. In order to construct the designed viewing zones, we found the basic design conditions for a parallax barrier with a commercial LCD panel. As the viewing zones for two viewers are formed with only two view-point design, the interval between the center positions of each viewing zone and the width of each viewing zone are small compared to designed values. We analyzed the primary cases, introduced two modified design methods to enlarge the interval and the width of the viewing zones, and simulated their characteristics. As designed with six unit view-point and each viewing zone of each viewer is formed with a merged view-point, we found that adequate interval and width of viewing zones can be made, and we verified it in comparison with the tabletop display module that we fabricated.
Broadcast Signal Transmission on a WDM-PON System Using a Polarization Independent RSOA and a Broadband ASE Light Source
Oh, Yeong Guk ; Lee, Hyuek Jae ;
Korean Journal of Optics and Photonics, volume 23, issue 6, 2012, Pages 264~268
DOI : 10.3807/KJOP.2012.23.6.264
In this paper, we propose a new method for broadcasting in a WDM-PON system which has the merits of a simple and cost effective structure. It can be constructed using only an ASE (Amplified Spontaneous Emission) light source and a PI-RSOA (Polarization Independent - Reflective Semiconductor Optical Amplifier). Error-free broadcast signal transmission over 30 Km for 24 channels at 1.25 Gb/s has been successfully demonstrated.
Optimum Designs of 2 Segment LED Reflectors for Various Light Output Distributions on the Surface of an LED Chip
Yim, Hae-Dong ; Lee, Dong-Jin ; Kim, Yang Gyeom ; Jeong, Jang Hee ; Lee, Seung-Gol ; O, Beom-Hoan ;
Korean Journal of Optics and Photonics, volume 23, issue 6, 2012, Pages 269~273
DOI : 10.3807/KJOP.2012.23.6.269
It is important to control the beam pattern of an LED by the design of a reflector. The optimum conditions of the structure parameters for the 2 segment LED reflector are analyzed and compared as they vary depending on the various intensity distributions of light output on the LED chip surface. It is also interesting that combining various types of reflectors is possible to give several efficient beam patterns, such as the maximum intensity profile or relatively wide controllability of beam angle.
Study on Polarization Characteristics of Optical Device and Improvement of Measurement Precision of Normal Incidence Ellipsometer for Measuring Optical Anisotropy of a Micro Spot
Lyum, Kyoung Hun ; Park, Sang Uk ; Seo, Young Jin ; Lee, Min Ho ; Kim, Woong Ki ; Kim, Sang Youl ;
Korean Journal of Optics and Photonics, volume 23, issue 6, 2012, Pages 274~280
DOI : 10.3807/KJOP.2012.23.6.274
A normal incidence ellipsometer is fabricated to measure the optical anisotropy of a small spot whose diameter is less than
, by adding a beam splitter and a prism to the conventional rotating analyzer type ellipsometer. The polarizing actions of the added optical components are calibrated to improve the accuracy of the anisotropy measurement. The standard deviation of the optical anisotropy factor decreased to 0.00083, and the variation of the optical anisotropy factor of rutile versus sample azimuth angle variation also decreased to 0.015, after adoption of a non-polarizing beam splitter and a quarter wavelength phase retarder, followed by removal of the optical fiber and a careful choice of measurement wavelength.