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High-sensitivity lumped-element bandpass modulators in LiNbO3

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3 Author(s)
Betts, G. ; Lincoln Lab., MIT, Lexington, MA, USA ; Johnson, L.M. ; Cox, C.H., III

Th design and evaluation of high-sensitivity lumped-element, bandpass modulators based on the integrated-optical Mach-Zehnder interferometer are presented. The optimum impedance-matched modulator response is formulated. Then a passive resonant drive circuit that achieves this response is described. In contrast to the usual baseband case, the maximum response of the impedance-matched modulator is independent of modulator length. Experimental results are given for several modulators built in lithium niobate using this circuit. Undesirable acoustic resonances are observed, and a technique for their suppression is demonstrated

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Lightwave Technology, Journal of  (Volume:7 ,  Issue: 12 )