Search Results

Now showing 1 - 3 of 3

Some of the metrics are blocked by your
consent settings
Network system engineering by controlling the chaotic signals using silicon micro ring resonator
(2012-10-15)
Shahidinejad, A.
;
Nikoukar, A.
;
Amiri, I. S.
;
Ranjbar, M.
;
Shojaei, A. A.
We investigate nonlinear behaviors of light known as bifurcation and chaos within a nonlinear silicon microring resonator (SMRR). The research is used to controlling SMRR's behaviors such as chaos applicable in security coding systems. The variable parameters affect the bifurcation to be happened in smaller roundtrip among total round trip of 20000 or input power. Simulated Results show that rising of the nonlinear refractive indices, coupling coefficients and radius of the SMRR leads to descending in input power and round trips wherein the bifurcation occurs. As result, bifurcation or chaos behaviors are seen at lower input power of 44 W, where the nonlinear refractive index is n <inf>2</inf>=3.2×10 <sup>-20</sup> m <sup>2</sup>/W. Smallest round trips of 4770 and 5720 can be seen for the R=40 μm and κ = 0.1 respectively. The controlled chaotic signals from the SMRR are passing through a polarizer beam splitter to generate quantum binary codes which are used in wireless network communication. © 2012 IEEE.
Some of the metrics are blocked by your
consent settings
Development of single mode fiber coupling coefficient using kinetic model
(2010-12-01)
Phattaraworamet, T.
;
Saktioto, T.
;
Ali, J.
;
Fadhali, M.
;
Yupapin, P. P.
We propose a simple kinetic model that can be used to improve the coupling coefficient value of a single mode fiber coupler in the fabrication process. The proposed model is time independent, where the internal and external parametric functions are included. The simulation is integrated over the coupling ratio range for the various fiber separations. The coupling coefficient value of the device is examined by using the coupling ratio range from 1% to 75%. The result obtained is compared with the experimental results, where it is noted that the separation of fiber cores significantly affects the coupling coefficient, exhibiting exponential behavior. We also found that the coupling coefficient gradient is significantly changed with respect to the coupling ratio. This model can be used to determine power losses of the fiber coupler at the coupled region, while the fabrication of the fiber coupler is operated. © 2009 Elsevier GmbH.
Some of the metrics are blocked by your
consent settings
Characterization of coupling power for single-mode fiber fusion
(2010-10-01)
Saktioto, T.
;
Ali, J.
;
Yupapin, P. P.
;
Fadhali, M.
Fabrication of single-mode fiber coupler by heating fibers on a flame is very common and popular. However, controlling the input and the output power quantities of the fiber coupling process is neither easy nor similar. Power losses occur at the coupling length as the effect of the geometry and structure of fibers during and after fusion. In application, the power losses will affect sensor devices, e.g. optical switch. This paper proposes power splitting into the second fiber junction as a new model by deriving and integrating the coupling power with two conditions of refractive index changes. First is the change in the vertical part and second is the change in the vertical and the horizontal parts. Both conditions are studied by perpendicular and parallel directions of coupling power. The model is examined with a linear change of refractive index where power absorption and reflection are accumulated by power losses. The result shows that power increases as the effect of losses by simulation. These power losses are lost by radiation out of cladding and fiber heating. © 2009 Elsevier GmbH.

KMITL

Browse

Filters

Settings

Sort By

Results per page

Search Results