An integrated, compact and upgradeable bidirectional multiplexer/demultiplexer and Add-drop multiplexing based on
array of ring resonators is proposed. The proposed structure is realized using basic elements in optical integrated circuit
domain. We show that using the proposed block wavelength separation in dense wavelength division multiplexing
standard is possible. Also, the introduced basic block can be used to realize other elements in all-optical networks.
The road vehicle communication system constitutes an important component of an intelligent transportation system
(ITS). In this structure, control station is connected to base station via optical fiber for accomplishing high bandwidth
data exchange. Due to millimeter-wave feature, the system has small cells and also provides high mobility. In order to
have fast handover and dynamic bandwidth allocation, a medium access control scheme is used. Base stations are
deployed along the road to support the communication link to a vehicle. In this paper, we use a quasi-crystal lens to
focus the reflected waves to reduce the number of the base stations. The structure of the quasicrystal lens posses 12-fold
symmetry and hence 12-fold symmetric quasi-crystal. In this quasi structure, we have demonstrated that if we select a
proper slab thickness, we can achieve focusing in the outside of the slab as well as equal intensity of the source wave.
In this paper, design of an ultra high-resolution, compact and tunable optical displacement sensor for optomechatronical
systems is presented. In this proposal nanophotonic principles are used to develop displacement sensor which is required
strongly in micro and nano machines especially micro robotics. For this purpose, in this work nanocrystal doped micro
ring resonator is used as the basic cell. Then we propose integrated case for array applications such as array of micro
mirrors. We show that the proposed sensor can easily detect well below nanometer to near picometer ranges. Also, it is
illustrated that using Electromagnetically Induced Transparency (EIT) resolution of the proposed sensor can be
increased.
In this paper, we investigate the three finger micro/nano gripper using piezoelectric actuator. Also a brief comparison of
various actuators is presented. Stress and strain contours and different conditions of structures that are used in fingers
will be shown and analyzed.
An efficient method for high precision displacement measurement based on micro scale ring resonator and MOEMS is presented. The proposed structure can be used as discrete and integrated sensor in engineering applications. Photo-elastic effect is used to convert the physical displacement to the index of refraction variation in the ring resonator array. Analytical relation for description of system transfer function is derived. Single and multiple ring resonators are examined for increase of the system sensitivity. It is shown that an array of multiple ring resonators (array) is better than single ring case. Effects of optical and geometrical parameters of the proposed structure on sensitivity are studied.
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