Kamoldilok, Surachart
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Kamoldilok, Surachart
Alternative Name
Kamoldilok, S.
Kamoldilok, Surachat
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surachart.ka@kmitl.ac.th
16 results
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Item type:Publication, Analysis of effective numerical aperture in 2-D photonic crystal waveguide(2014-01-01); ; Yupapin, P. P.The effective numerical aperture calculation in two-dimensional Photonic crystal waveguide has been proposed. In this paper we present the analysis of ray optics refracted inside nano rods and at the boundaries between rods, which separates rod gap is much smaller than the incident wavelength assumed to reflect on the region. In operation, the resolving numerical aperture was compared with the finite difference time domain method via OptiFDTD software. Although numerical aperture mentioned above was found to be extremely close to fiber optics, a transmission passes though compartments of the rods are observed due to significant estimation of transmission and reflection of electric field. The compared simulation results will be discussed. By the aforementioned is that in the near future we will modify wave equation in periodic media of waveguide structures reached to the transverse electric equation of beam propagation in the two-dimensional Photonic crystal waveguide analysed. © (2014) Trans Tech Publications, Switzerland. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A nano-scale transducer using a PANDA type ring resonator for gas sensor applications(2012-03-01); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Accurate RMS calculations for periodic signals by Trapezoidal rule with the least data amount(2013-11-12); ; ; The purpose of this research is to present a simple method using the least data amount to calculate root mean square (RMS) values of periodic signals (constructed from Fourier series) which the highest harmonic order is known or able to be estimated. In the research, trapezoidal rule with the least data amount was proved and tried to calculate definite integral values of sinusoidal signals from a lot of trial runs until a significant property was found. Then the property would be deployed to calculate RMS values. Results of the research can provide not only more convenient processes of simple trapezoidal rule but also more accurate results than the patented Simpson's rule in the same least data amount. © 2013 Sompop Poomjan et al. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Elongation measurement using 1-dimensional image correlation method(2016-01-01); Aim of this paper was to study, setup, and calibrate an elongation measurement by using 1- Dimensional Image Correlation method (1-DIC). To confirm our method and setup correctness, we need calibration with other methods. In this paper, we used a small spring as a sample to find a result in terms of spring constant. With a fundamental of Image Correlation method, images of formed and deformed samples were compared to understand the difference between deformed process. By comparing the location of reference point on both image's pixel, the spring's elongation were calculated. Then, the results have been compared with the spring constants, which were found from Hooke's law. The percentage of 5 percent error has been found. This DIC method, then, would be applied to measure the elongation of some different kinds of small fiber samples. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Micro stirling engine controlled by light(2011-01-01); ; Yupapin, P. P.This paper proposes a new technique for a micro Stirling engine operation using leaky light resonant or whispering gallery modes (WGMs) in a nano-waveguide, in which the nano-waveguide is designed and configured by a nanoring resonator. By using the Optiwave programming based on Finite Difference Time-Domain (FDTD) method, an InGaAsP/InP nanoring resonator was designed and simulated. The simulation results obtained have shown that the leaky light resonant modes can be controlled by the ring radius variations, whereas the maximum resonant peak of nanoring resonator is occurred at the inner and outer ring radii of 0.775 and 1.55 μm respectively. The maximum peak intensity of the nanoring resonator is 12000 W/m<sup>2</sup>. Finally, the use of leaky light mode resonant peak of the center nanoring resonator for micro-Stirling engine is discussed in details. © 2011 Published by Elsevier Ltd. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Low-cost tunable light source using RGB-LED module for absorption spectroscope(2019-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Tissue culture system using a PANDA ring resonator and wavelength router for hydroponic plant(2012-06-12); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Novel communication security scheme using dark-bright soliton conversion behaviors(2011-02-01); ; Yupapin, Preecha P.We propose a novel scheme of communication security using dark-bright soliton conversion behaviors in which the transmission signals can be secured by using the random codes generated by dark-bright soliton conversion within the system. The system consists of two parts, where first, an optical Mach Zhender interferometer (MZI) is used to generate the coincidence dark and bright soliton pair by using the (2) phase retarder (i.e., a coupler), in which |D and |B states represent the orthogonal dark and bright soliton pulses. The signals from through (Th) port are formed and transmitted via the transmission line to the end user. Second, the adddrop filter is used to separate(filter) the required signal form the transmission link, in which the Th and drop port signals are formed as a reference and signal, respectively. In this case, we assume that both solitons are input into the MZI ports simultaneously (coincidently), in which the binary codes are randomly formed and used to present the transmission data, in which the states 0 and 1 are represented by |DB and |BD, respectively. Finally, the eavesdropper and signal accuracy are also described. © 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Proof of using fourier coefficients for root mean square calculations on periodic signals(2013-01-01); ; ; The purpose of this work is to academically prove using Fourier coefficients of periodic signals for root mean square (RMS) calculations. In the detail, properties of Fourier series are brought to calculate RMS values of periodic signals obviously. Results from this work can confirm that this method is more convenient, efficient and simple for RMS calculations than Calculus integration technique (if Fourier coefficients are given) and can be cited for further researches. © 2014 Sompop Poomjan et al. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Drug trapping and delivery for Alzheimer's diagnosis(2012-10-01);