Linearization of 1.55-/spl mu/m electroabsorption modulated laser by distortion emulation and reversal for 77-channel CATV transmission

An electroabsorption modulated laser (EML) is linearized by emulation and reversal of the nonlinear distortion using a companion EML inside an optoelectronic interferometer. Suppression of composite second-order and triple-beat signals to <-61 and <-63 dBc, respectively, have been achieved for a carrier-to-noise ratio (CNR) of 50 dB with a 77-channel loading of CATV carriers. Further performance enhancement can be expected through tailoring of device and component characteristics to suit the application.