Srinuanjan, Keerayoot
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Srinuanjan, Keerayoot
Alternative Name
Srinuanjan, K.
Srinuanjan, Kerrayoot
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Email
keerayoot.sr@kmitl.ac.th
14 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, Dry film Holographic grating based on computer-generated mask Lithography(2022-01-01); ; This paper presented an alternative technique for fabricating the dry film holographic grating based on a mask generated by computer simulation and experimental results. The mask was generated by a fringe pattern which is created by the mathematical model of two beams interference with various angles. Computer simulation of the fringe pattern was printed on film, i.e., the holographic grating mask. The mask was attached on dry film and then illuminated by UV light, where the lithography technique was applied. According to the lithography technique, the computer-generated holographic grating mask was transferred to dry film. After fabrication, fringe patterns obtained from the grating were observed. Then, the grating period was analyzed and confirmed by Scanning Electron Microscope (SEM). Experimental results show that the method could apply to fabricate the dry film holographic grating. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Fabrication of holographic grating by alternative setting of michelson interferometer(2021-01-28) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Multi-range Ammonia Gas Sensor Control and Monitor via IoT System(2022-01-01); ; In this paper, we present a multi-range of ammonia gas concentration control and monitoring via IoT system. We can select the ammonia gas concentration measurement range by adjusting load resistance within the voltage divider circuit. The appropriate measurement range, which corresponds to the concentration of ammonia gas produced by agricultural and industrial activities, can control and monitor via Blynk application. The MQ-137 gas sensor is selected as the main sensor, and each load resistance condition within the voltage divider circuit is calibrated with known ammonia gas concentration inside a calibration box. The calibration data is input into computer programming and processed by ESP8266 microprocessor. After calibration, we obtained a multi-range ammonia gas sensor suitable for measuring the ammonia gas concentration for each concentration range. The experiment showed that load resistance affects the measurement accuracy of ammonia gas concentration. We can select the load resistance suitable for the ammonia gas concentration and display on a smartphone via IoT system. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Micro plasma source design using WGMs a PANDA ring(2014-01-01); Yupapin, P. P.Plasma is a one of state of matter that is produced by applying energy into gas or fluid like, where the ionized electrons from gas or fluid atoms to be free electrons. In this paper, the use of micro plasma source generation by using a PANDA ring resonator is introduced, in which the whispering gallery modes (WGMs) are formed within the center ring and can be used to create the high power of electromagnetic wave for gas plasma production. In application, the micro plasma source can be fabricated in small scale material process or others suitable operation. In this case, the plasma source can be decreased to be micro-scale device, where in fact, the common plasma source system size is large because the high energy source to produce high power plasma is required. Finally, the detail of using such small scale plasma source is discussed. The theoretical details of whispering gallery mode and quantum tunneling effects are also reviewed and discussed. © (2014) Trans Tech Publications, Switzerland. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, An electricity generator model by the water delivery system of sanitary ware(2014-01-01); In this research is presented electricity production of sanitary ware, which can be covered kinetic energy of water to electric current from water delivery system. A small electric generator will be set on the water delivery system of sanitariums. It consists with a turbine electric generator and a big tank which build in on tank of a sanitarium. Turbine generator is generated small electric currents by a lot of water inside pipe. If this system were set in a large building for example such as department store, etc. the electric currents would be on generating in order to cumulative energy. In which Bangkok has a population about ten millions of people which sanitariums are used about a hundred millions of time per day. The experimental results of this model can be calculated electric currents to compare with systems which were set on large building. © (2014) Trans Tech Publications, Switzerland. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Force sensing device design using a modified add-drop filter(2012-01-01); Yupapin, P. P.We propose a new sensing device using a modified add-drop filter known as a PANDA ring resonator type, in which the sensing unit is consisted of an optical add/drop filter and two nanoring resonators, where one ring is placed as a sensing device, the other ring is set as a reference. In operation, the external force is assumed to exert on the sensing ring resonator, which can form the measurement. The finite difference time domain (FDTD) method called Optiwave is used to manipulate the sensing behaviors of the proposed system. The obtained results have shown that the change in wavelength due to the change in sensing ring radii is seen, in which the wavelength shift of 1 nm resolution is achieved. The recovery and the reciprocal signals can also be formed, which can be used to approach to many advantages of measurements, including the possibility of standardizing measurement accuracy. The behavior of light within a PANDA ring resonator is also analyzed and reviewed. © 2010 Published by Elsevier Ltd. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A self-calibration nano-scale sensing transducer using PANDA ring resonator(2010-12-01); ; Yupapin, P. P.We propose a new system of self-calibration measurement using a nano-scale sensing transducer, which is known as a PANDA ring resonator type, whereas the sensing unit is combined into the system by mean of one ring, and the other ring is set as a reference signal. We use the method of finite difference time domain (FDTD) via the computer programming called Opti-wave to analyze and simulate. The simulation result has shown that we can use this system for high-precision and self-calibration measurement using a nano-scale sensing transducer, whereas the measurement resolution of 1 nm can be obtained. The recovery and the reciprocal signals can also be formed, which can be used to approach to many advantages of measurements, including the possibility of standardizing measurement accuracy. ©2010 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Proposed nano-scale sensing transducer using nano-waveguide for dynamic measurement applications(2009-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A fabrication of galvanic cell from pineapple peel residue in agricultural industries(2014-01-01); In this research, we present a fabrication of an electric generation experimental kit which is comprised of pineapple peel residue from agricultural industries. Juice from squeezing pineapple peel was used as electrolyte of a galvanic cell. Sufficient acidity of the juice could activate electrochemical reaction in the galvanic cell kit using a zinc plate and copper plate as electrodes. During the experiment, adjustable distances between the two electrodes were controlled to obtain maximum output voltage. It has been already known that a galvanic cell with a lower distance between electrodes could provide higher output voltage but both electrodes could not touch each other. Experimental results from controlling distances between the 2 electrodes showed that the galvanic cell kit could provide high output voltage of 1.00 V which was able to apply in electronic devices. © (2014) Trans Tech Publications, Switzerland.