Title :
A novel optical modulator system with enhanced linearization properties
Author :
Lam, Juan F. ; Tangonan, Gregory L.
Author_Institution :
Hughes Res. Labs., Malibu, CA, USA
Abstract :
The authors propose a novel optical modulator system that has the properties of having a null third-order intermodulation distortion (IMD); a spurious signal free dynamic range in excess of 100 dB as determined by the second-, fourth-, and fifth-order IMD; and a linear dynamic range of 2.46 radians. It is shown that a combination of a tandem of two directional couplers has the property of eliminating completely third-order IMD term, gives a large spurious signal free dynamic range, and provides a simple and practical solution to the problem of linearization of optical modulators.<>
Keywords :
directional couplers; intermodulation; optical communication equipment; optical couplers; optical modulation; optical waveguide theory; directional couplers; enhanced linearization properties; linear dynamic range; null third-order intermodulation distortion; optical couplers; optical modulator linearisation; optical modulator system; spurious signal free dynamic range; Directional couplers; Dynamic range; Intensity modulation; Nonlinear optics; Optical distortion; Optical mixing; Optical modulation; Radio frequency; Transfer functions; Voltage;
Journal_Title :
Photonics Technology Letters, IEEE
