Title :
High-sensitivity lumped-element bandpass modulators in LiNbO3
Author :
Betts, Gary E. ; Johnson, Leonard M. ; Cox, Charles H., III
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
fDate :
12/1/1989 12:00:00 AM
Abstract :
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
Keywords :
electro-optical devices; integrated optics; light interferometers; lithium compounds; optical materials; optical modulation; LiNbO3; acoustic resonances; high sensitivity lumped element bandpass modulators; integrated-optical Mach-Zehnder interferometer; optimum impedance-matched modulator response; passive resonant drive circuit; suppression; Baseband; Circuits; Electrodes; Impedance; Intensity modulation; Optical interferometry; Optical modulation; Phase modulation; Resonance; Voltage;
Journal_Title :
Lightwave Technology, Journal of
