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Generation of DSA for security application
(2011-05-02)
Amiri, I. S.
;
Raman, K.
;
Afroozeh, A.
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Jalil, M. A.
;
Nawi, I. N.
A novel system of dark soliton array (DSA) for secured communication generated by using the multiplexed dark soliton pulses is proposed. The multi soliton pulses with relevant parameters are input into the micro ring resonators system with the radii of 10 μm and 5 μm. The dynamic dark solitons can be controlled and generated. The DSA are obtained by using a series micro ring resonators with parameters where in the wavelength range of λ<inf>1</inf> is 15016 nm, λ<inf>2</inf> is 1518 nm and λ<inf>3</inf> is 1520 nm. For security applications, the DSA can be tuned and amplified. Thus, the use of DSA for high capacity transmission can be realized by using proposed secured system. In transmission, the long distance link of the multi variable network can be performed by this DSA.
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Dark soliton array for communication security
(2011-05-02)
Amiri, I. S.
;
Afroozeh, A.
;
Nawi, I. N.
;
Jalil, M. A.
;
Mohamad, A.
A system of dark soliton array (DSA) for secured optical communication using the multiplexed dark soliton pulses is presented. Different wavelength of input soliton pulses with relevant parameters are fed into the rings system while the radii of the rings are 7 μm, 5 μm and R<inf>d</inf> = 50 μm. Result shows that the free spectrum range of dark soliton input with the center wavelength of 1503 nm is 0.073 nm. DSA can be obtained using a series of micro ring resonators with input optical solitons of different wavelength, range from λ = 1513 nm to λ = 1517 nm. The DSA can be tuned and amplified used for many application in optical communication such as security purposes. In transmission link, the long distance link of the multi variable network can be performed using DSA.
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A reliable Nd:YAG laser welded stainless steel 304 for photonics device packaging application
(2011-05-02)
Nawi, I. N.
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Saktioto
;
Fadhali, M.
;
Hussain, M. S.
;
Ali, J.
An ultra compact pulsed Nd:YAG laser with laser beam peak power of 3.5 kW and 6.5 ms pulse duration is employed to produce a butt joint and lap joint for both spot and seam welding on a stainless steel 304 specimen. The strength test of the weld joints is conducted by pulling the joint materials using INSTRON Series IX/s Automated Materials Tester System. From the experimental results, it is found that a butt joint produces much stronger attachment than a lap joint. The stronger attachment is contributed by a larger volume of welded stainless steel 304 at the joint interfaces. However, the strength of a lap joint can be increased by producing a deeper weld penetration depth. It is done by controlling the laser beam parameters such as laser peak power and pulse duration. It is inferred that the commercial welding material, InvarTM, provides more robust joint than stainless steel 304. It is also concluded that the welded stainless steel 304 cannot attain the strength and elastic modulus of the stainless steel 304 itself. However, the stainless steel 304 is a good welding material for photonics device packaging by using pulsed Nd:YAG laser welding technique.
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Capacity enhancement in communication system via NNRR
(2011-05-02)
Aziz, M. S.
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Afroozeh, A.
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Roslan, M. S.
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Jalil, M. A.
;
Nawi, I. N.
We present the effect of the FSR on capacity of communication system. A new novel system of soliton generation using a 1.30 μm optical Gaussian pulse in a nonlinear nano-ring resonator (NNRR) system forms the soliton pulse train. The soliton pulse wavelength with center wavelength at 1.30 μm is generated after a powerful Gaussian soliton pulse is input into the NNRR system, we propose a system that can be used to solve many problems in communication systems. The results show that we how do receive the free spectrum range (FSR) by NNRR. This is obtained via the add/drop filter, which can be used to increase the channel capacity in the communication network. In this paper the best FSR is 0.052 nm. This result allows the channel capacity expanding due to the abundance of propagation spacing from the soliton collision.
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Analytical treatment of parametric effects in a ring resonator
(2011-05-02)
Nawi, I. N.
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Hairi, H.
;
Daud, S.
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Aziz, M. S.
;
Ali, J.
We propose two systems of a nano-waveguide to study the effects of ring resonator radii and coupling coefficient. The first proposed system is introduced as a single ring resonator. The change of the center wavelength from the output signal is monitored and analyzed. It shifts towards higher wavelength of the spectrum. The multistage ring resonator system consists of two micro and a nano ring resonators that can be integrated into a single system. The soliton pulse propagating within a Kerr type nonlinear medium is used to generate the large bandwidth signals. By using the suitable parameters, for instance, the input power of soliton, coupling coefficients, and ring radii, the short-wave and millimetre-wave output signals can simultaneously be generated in a multi-stage ring resonator (MMRR). We found that by using the MMRR, a desired response can be achieved over a broader portion of the spectrum compared to the single-stage ring resonator (SMRR) in which it is more preferable in applications.
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Nd:YAG laser welding of stainless steel 304 for photonics device packaging
(2011-05-02)
Nawi, I. N.
;
Saktioto
;
Fadhali, M.
;
Hussain, M. S.
;
Ali, J.
Although pulsed Nd:YAG laser welding has been widely used in microelectronics and photonics packaging industry, a full understanding of various phenomena involved is still a matter of trials and speculations. In this research, an ultra compact pulsed Nd:YAG laser with wavelength of 1.064 μm has been used to produce a spot weld on stainless steel 304. The principal objective of this research is to examine the effects of laser welding parameters such as laser beam peak powers, pulse durations, incident angles, focus point positions and number of shots on the weld dimensions: penetration depth and bead width. The ratio of the penetration depth to the bead width is considered as one of the most critical parameters to determine the weld quality. It is found that the penetration depth and bead width increase when the laser beam peak power, pulse duration and number of shot increase. In contrast, the penetration depth decreases when the laser beam defocus position and incident angle increase. This is due to the reduction of the laser beam intensity causing by the widening of the laser spot size. These experimental results provide a reference on an optimal laser welding operations for a reliable photonics device packaging. The results obtained shows that stainless steel 304 is suitable to be used as a base material for photonics device packaging employing Nd:YAG laser welding technique.
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Radio wave generation using dark and bright soliton
(2011-05-02)
Jalil, M. A.
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Afroozeh, A.
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Aziz, M. S.
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Nawi, I. N.
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Ali, J.
In this study we propose a new system for radio wave using a soliton pulse within a micro waveguide and nano-waveguide. The system consists of two micro ring resonators and a nano ring resonator that can be integrated into a single system. The input soliton power, coupling coefficients, and ring radii, are used to control the short-wave and millimeter-wave output signals being generated and filtered in a single system. The large bandwidth signal is generated using a soliton pulse within a Kerr-type nonlinear medium. The signals with broad bandwidth or wavelength can then be generated. Results obtained have shown the potential of using this system for a broad light spectra generation.

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