Mohamed Elrayany

Mohamed Elrayany

مصر
١ ألف متابع أكثر من 500 زميل

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نبذة عني

I'm a layout design engineer in Si-Vision. I am interested in designing a high quality…

النشاط

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الخبرة

  • رسم بياني Si-Vision

    Si-Vision

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    Cairo, Egypt

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    Cairo Governorate, Egypt

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    Alexandria, Egypt

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التعليم

المنشورات

  • A compact silicon-on-insulator gas sensor

    SPIE OPTO, Silicon Photonics XIV

    Gas sensors have been widely used for different applications including chemical detection, quality assurance, environmental monitoring and medical diagnostics. Optical gas sensors exhibit higher sensitivity and wider dynamic range than their electrical counterparts. This work demonstrates a novel design for a gas sensor based on conventional Silicon-on-insulator (SOI) platform. The sensor design is based on interferometer working in the near-infrared (NIR) region where directional couplers were…

    Gas sensors have been widely used for different applications including chemical detection, quality assurance, environmental monitoring and medical diagnostics. Optical gas sensors exhibit higher sensitivity and wider dynamic range than their electrical counterparts. This work demonstrates a novel design for a gas sensor based on conventional Silicon-on-insulator (SOI) platform. The sensor design is based on interferometer working in the near-infrared (NIR) region where directional couplers were used in splitting and combining the input power to and from the two arms of the interferometer with 50/50 splitting ratio at 1550nm. Slot-waveguide is used in the sensing arm of the interferometer and strip-to-slot and slot-to-stip converters with high coupling efficiency were used for transforming the optical mode. Finite difference eigenmode (FDE) solver was used to calculate its mode field profiles, effective index, and loss to optimize the waveguide dimensions and to achieve a waveguide sensitivity of 0.7 at 1550nm for 220nm silicon thickness. Three-dimensional finite-dif-ference-time-domain (3D-FDTD) method was used in the analysis and optimization of the proposed gas sensor. Results show significant improvement in the figure-of-merit (FOM) and reduction of device area. The sensor also exhibits low insertion loss (IL) leading to a low detection limit. The proposed sensor is easily fabricated using CMOS technology which is essential for mass-scale fabrication, and thus a low-cost sensor can be integrated with optical fiber communication systems and optoelectronic systems. Therefore, the proposed sensor has the potential to be a key component in lab-on-a-chip (LOC) systems.

    مؤلفون آخرون
    • Raghi S. El Shamy
    • Mohamed A. Swillam
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المشروعات

  • High Speed Serial Link

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    "Analog IC design of high speed serial link transceiver for 10 GbaseKR standard using a 65 nm CMOS process"

    Serial link transceivers are widely used nowadays in different platforms from handheld devices to data centers. The power consumption of the transceivers is a key part of the platform power; especially as data rates keep increasing.
    The main goal of the project is to design and implement a 10 Gb/s I/O transceiver. ADC-based equalizer in the receiver will be implemented to…

    "Analog IC design of high speed serial link transceiver for 10 GbaseKR standard using a 65 nm CMOS process"

    Serial link transceivers are widely used nowadays in different platforms from handheld devices to data centers. The power consumption of the transceivers is a key part of the platform power; especially as data rates keep increasing.
    The main goal of the project is to design and implement a 10 Gb/s I/O transceiver. ADC-based equalizer in the receiver will be implemented to achieve better performance in terms of jitter and bit-error-rate.
    In the TX side, a serializer, pre-driver and driver will be implemented.
    In the RX side, a VGA and CTLE will be implemented to relax the constraints on the ADC to follow and to overcome the bandwidth limitations and distortion caused by the channel. Digital equalization and de-serialization will be implemented in the DSP.
    Synchronization blocks will be implemented in the TX and RX side to ensure proper timing for best performance. Reduced TX swing reduces the clock loading and thus decreases the power consumption of the clock driver.

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