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Integrated optical architectures for tapped delay lines

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2 Author(s)
Anemogiannis, E. ; Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA ; Kenan, Richard P.

An integrated optics (IO) device that is an implementation of an IO tapped delay line is discussed. It is capable of performing discrete convolution of an optical pulse sequence with a preset digital function. Several architectures for the device are presented. A systematic realization of the preset function samples that permits efficient utilization of all the input light power and maximization of the output signal-to-noise ratio (SNR) for the device is discussed. A detailed analysis of what determines the number of preset samples that can be realized and how to realize them on a LiNbO3 crystal is given. Two digital filter design examples are presented, and the quantization error effects on their performance are examined. The same architectures are shown to implement digital-to-analog (D/A) conversion and systolic multiplication of a Toeplitz matrix with a vector having the form of optical pulses

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Lightwave Technology, Journal of  (Volume:8 ,  Issue: 8 )