Optical Coherent Receiver Sensitivity Analysis

Optical coherent receiver technology can provide theoretical sensitivity levels to the order of 10’s of photons/bit. This application note provides an overview of common coherent receiver architectures…

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Grating Coupler Design based on SOI Technology

Grating couplers are widely used input/output devices that couple light between fiber (or free-space) and sub-micrometer waveguides. This application note…

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Ring Resonator Fiber Optic Gyroscope

This application note demonstrates the shift in resonant frequency in an optical ring resonator due to Sagnac effect and how a closed loop feedback system can be used to calculate the angular…

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Optical Phase Locked Loop for Analog Homodyne Detection

For coherent demodulation it is essential that the frequency and the phase of the local oscillator closely matches the carrier signal…

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40 Gbps Silicon Depletion Mode TW Modulator

Traveling wave modulators are widely used for their low power consumption and high speeds. In this application note a transmission line model is combined with an optical…

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Symmetric Lossless X Coupler

The X Coupler is a basic component used in many kinds of optical circuits. Here its properties are analysed by theoretical means, and also by detailed simulation of…

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