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Bringing Reality to 40Gbps Duo-Binary Applications

Bringing Reality to 40Gbps Duo-Binary Applications. Understanding System Bandwidth 2-20-2008 ARahman,MBroman,MHowieson. Ideal DuoBinary System Bandwidth. Ideal DuoBinary System Bandwidth. Driver Bandwidth=20GHz. Network Bandwidth Approximation. Good for ideal single pole filters only.

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Bringing Reality to 40Gbps Duo-Binary Applications

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  1. Bringing Reality to 40Gbps Duo-Binary Applications Understanding System Bandwidth 2-20-2008 ARahman,MBroman,MHowieson

  2. Ideal DuoBinary System Bandwidth

  3. Ideal DuoBinary System Bandwidth • Driver Bandwidth=20GHz

  4. Network Bandwidth Approximation • Good for ideal single pole filters only

  5. From 10Gbps to 40Gbps • As the Target Bandwidth approaches the system bandwidth the filter bandwidth goes to infinity

  6. Important Filter Parameters • Enhancing the Bessel filters return loss • Controlling Group Delay • Electrical Length effects

  7. Thin Film Technology to the Rescue • Design • Simulation • Components • Package and footprint normalizing • BGA, Wirebond • Test Bench • CMM’s and Measurement

  8. Case Studies in 40Gbps • L3 Narda Application Measurements

  9. Conclusion • The difficulties in achieving optimum filtering components for duo-binary optical modulation schemes are realized with simulation and design aide from Thin Film Technology Corp.

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