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Tilt mechanism for precision control of down-slope component of gravitational force for micro force generation
(2011-01-01)
Maru, Koichi
;
Khunnam, Wanchai
;
Hu, Liu Yan
;
Lu, Rong Sheng
;
Yupapin, Preecha
A simple single-axis tilt mechanism for precision control of the down-slope component of gravitational force is proposed. Precise tilt motion is realized by using a wedge shaped block and a linear actuator driven by a stepping motor. The proposed mechanism can be easily constructed by standardized aluminum frames for the skeletal structure. The measurement result indicates that the tilt angle can be controlled by adjusting the position of the linear actuator and good reproducibility of the tilt angle is achieved by using the proposed tilt mechanism.
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White light generation and amplification using a soliton pulse within a nano-waveguide
(2009-01-01)
Sarapat, Khuntong
;
Ali, Jalil
;
Yupapin, Preecha P.
;
Worrarutkul, Artit
;
Khunnam, Wanchai
We propose a novel system of a nano-waveguide that can be used to generate the continuous optical spectrum, i.e. white light. A system consists of two micro and a nano ring resonators that can be integrated into a single system. The large bandwidth signa is generated by using a soliton pulse propagating within a Kerr type nonlinear medium, whereas the continuous bandwidth or wavelength of light signal can be performed. Results obtained have shown the potential of using such system for white light source generation and amplification, which is discussed. The amplified pulse can be stored within a nano-waveguide, which is allowed to form the continuous spectrum after amplification. Alternatively, the low level solar radiation can be amplified, and the bandwidth signals can also be enlarge. © 2009 Elsevier B.V. All rights reserved.
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Entangled photon recovery state using a fiber ring resonator incorporating an erbium-doped fiber amplifier
(2008-12-01)
Suchat, Suebtarkul
;
Khunnam, Wanchai
;
Yupapin, Preecha P.
We investigate a new system of photon-entangled recovery states using a fiber ring resonator incorporating an erbium-doped fiber (EDF). We also show that states of weak entangled photons can be regenerated and recovered after circulating in the amplified fiber optic medium. The output entangled photon states can be regenerated by adjusting the polarization controller of the amplified photons. Results obtained show that such a proposed system can be used to perform the polarization entangled recovery states, and the amplified output gain can be achieved. The amplifying noise is also detected and seen on the spectrum output, which affects the entangled photon output visibility. The change in the system temperature is also investigated, which shows that entangled state walk-off compensation is required to obtain the optimum entangled photon visibility. © 2008 Society of Photo-Optical Instrumentation Engineers.
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The entangled photons generation system using week light in fiber optic and timing-walk off compensation
(2007-01-01)
Yupapin, Preecha P.
;
Khunnam, Wanchai
;
Suchat, Suebtarkul
We propose a new system for multi-entangled photons generation using an all fiber optic arrangement. The generation of the entangled states of two, four and eight entangled photons using an all fiber optic scheme is analyzed. The timing-walk off on the entangled state of two and four entangled photons suffering from the polarization in fiber optic is characterized. The compensation of such effects and the optimal entangled states of the entangled photons in fiber optic are analyzed and discussed. © 2007 World Scientific Publishing Company.

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