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Linearized modulator for suboctave-bandpass optical analog links

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1 Author(s)
Betts, G. ; Lincoln Lab., MIT, Lexington, MA, USA

The spurious-free dynamic range of a suboctave externally modulated optical analog link can be improved (to >140 dB Hz4/5 ) with modest received optical power and little noise figure penalty by using a simple linearized modulator. Its design consists of two standard Mach-Zehnder interferometric modulators in series, and so can operate at microwave frequencies. This paper develops standardized measures of linearized modulator performance, and uses them to evaluate the modulator; link examples are also given. A simple experiment verifies the basic theoretical predictions

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:42 ,  Issue: 12 )