Title :
Predistortion techniques for linearization of external modulators
Author_Institution :
Lucent Technol., Holmdel, NJ, USA
Abstract :
Electronic predistortion has been the dominant linearization technique commercially because it adds nothing to the complexity of the optics. To date, all commercial 1550-nm CATV transmitters utilize MZ modulators. However, integrated EA modulated lasers (EMLs) may soon be used in WDM systems carrying QAM channels. This paper reviews techniques commonly used to predistort both MZ modulators and EMLs and discusses both fundamental and practical performance limitations.
Keywords :
cable television; electro-optical modulation; electroabsorption; optical transmitters; semiconductor lasers; wavelength division multiplexing; 1550 nm; 1550-nm CATV transmitters; MZ modulator predistortion; MZ modulators; QAM channels; WDM systems; external modulator linearisation; integrated EA modulated lasers; practical performance limitations; predistortion techniques; Chirp modulation; Diodes; Fiber nonlinear optics; Intensity modulation; Nonlinear distortion; Optical distortion; Optical modulation; Optical transmitters; Predistortion; Transfer functions;
Conference_Titel :
Nanostructures and Quantum Dots/WDM Components/VCSELs and Microcavaties/RF Photonics for CATV and HFC Systems, 1999 Digest of the LEOS Summer Topical Meetings
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-5633-0
DOI :
10.1109/LEOSST.1999.794741
