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Optoelectronic Integration
Emory Coughlin-Tarvas EE4611 4/14/2017
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Introduction What is optical integration Some problems that we face
Importance Elements Applications Summary References 5 key points
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Photonic Integrated Circuit (PIC)
Integrated circuits with optic and electronic components Made by Photolithography and other new forms of integration Materials used Lithium Niobate Gallium Arsenide Indium Phosphide Silica on Silicon
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What’s the point? Optical frequencies: Fiber Optics have minimal loss
From 4x Hz to 2x Hz Infrared to Ultraviolet Fiber Optics have minimal loss Minimal Noise Low Voltage and Power input High data transfer rates High speeds
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Photon vs Electron Photon Electron Small interaction between photons
Propagate outside the medium and for longer distances Electron Larger interaction between electrons Propagate only inside or on the material
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Fiber (Silica) Metallic Wire (Copper) Material SiO2 Cu Loss Low High Speed Bandwidth Size Small Weight Very Light Light Interference/Noise Cost Very Cheap Cheap
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What is on a PIC chip? Unlike electronic integrated circuits, there is no primary device Waveguides Power Splitters Optical Amplifiers Lasers Detectors
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Waveguides Three types Planar Linear Cylindrical
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Integrated Lasers Types: Advantages: Gas Solid-State Semiconductor
VCSEL Advantages: Compact Low power consumption High-Speed Modulation Tunable
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Problem with Pic’s today
These elements require a variety of integration techniques and materials Feature size is large Integration density is low Expensive Software is not powerful enough to test yet
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Applications Fiber-Optic communications Biomedical Photonic computing
Big data computing
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Intel The only fully integrated silicon photonics solution with Intel's hybrid laser technology 100 Gigabits per second Wanting to get to 400 Gbps in the future
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Summary There are many benefits to using optical elements including low power consumption and high speeds The problems we are running into so far are that it is too expensive to make and try at this point As of right now optoelectronics are mostly used in communications
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ReSources photonics/silicon-photonics-overview.html nic+integrated+circuit+reasons&source=bl&ots=UpZmGJg4O7&sig=4Sn4z1w5bG- K2JTI6qkc6QG5kX4&hl=en&sa=X&ved=0ahUKEwjNx7_K5ujSAhWJg1QKHZi3BjoQ6AEIPD AE#v=onepage&q&f=false
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5 key concepts Speed and efficiency is high, also made with cheap and light materials. Hard to physically make because of technological barriers. Used in many fields including communications, computing, biomedical, and power systems. Fiber optics have low loss and cause minimal noise They can be used at high frequencies with high bandwidth
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