Title :
Linearized modulator for suboctave-bandpass optical analog links
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
fDate :
12/1/1994 12:00:00 AM
Abstract :
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
Keywords :
Mach-Zehnder interferometers; cable television; electro-optical modulation; intermodulation distortion; microwave links; optical fibre communication; Mach-Zehnder interferometric modulators; cable TV; intermodulation distortion; linearized modulator; microwave frequencies; noise figure penalty; optical insertion loss; received optical power; spurious-free dynamic range; suboctave-bandpass optical analog links; Cable TV; Detectors; Dynamic range; Electrooptic modulators; Noise figure; Optical design; Optical distortion; Optical interferometry; Optical modulation; Optical noise;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
