Title :
Distortion in linearized electrooptic modulators
Author :
Bridges, William B. ; Schaffner, James H.
Author_Institution :
California Inst. of Technol., Pasadena, CA, USA
fDate :
9/1/1995 12:00:00 AM
Abstract :
Intermodulation and harmonic distortion are calculated for a simple fiber-optic link with a representative set of link parameters and a variety of electrooptic modulators: simple Mach-Zehnder, linearized dual and triple Mach-Zehnder, simple directional coupler (two operating points), and linearized directional coupler with one and two dc electrodes. The resulting dynamic ranges, gains, and noise figures are compared for these modulators. A new definition of dynamic range is proposed to accommodate the more complicated variation of intermodulation with input power exhibited by linearized modulators. The effects of noise bandwidth, preamplifier distortion, and errors in modulator operating conditions are described
Keywords :
Mach-Zehnder interferometers; electro-optical modulation; harmonic distortion; intermodulation distortion; optical communication equipment; optical directional couplers; optical fibre communication; optical fibres; optical noise; Mach-Zehnder modulator; directional coupler; dynamic range; electrooptic modulators; fiber-optic link; harmonic distortion; intermodulation; linearized modulators; link parameters; modulator operating conditions; noise bandwidth; noise figures; preamplifier distortion; Directional couplers; Dynamic range; Electrooptic modulators; Interference; Nonlinear optics; Optical distortion; Optical interferometry; Optical modulation; Optical receivers; Optical sensors;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
