Title :
Linearization of 1.55-/spl mu/m electroabsorption modulated laser by distortion emulation and reversal for 77-channel CATV transmission
Author :
Yu, J. ; Chang, T.Y. ; Wilson, G.C. ; Wood, T.H. ; Sauer, N.J. ; Johnson, J.E. ; Tanbun-Ek, T. ; Morton, P.A.
Author_Institution :
Bell Labs., Lucent Technol., Holmdel, NJ, USA
fDate :
3/1/1998 12:00:00 AM
Abstract :
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.
Keywords :
cable television; electro-optical modulation; electroabsorption; optical fibre subscriber loops; optical noise; semiconductor lasers; 77-channel CATV transmission; 77-channel loading; CATV carriers; carrier-to-noise ratio; companion EML; composite second-order beat signal suppression; distortion emulation; electroabsorption modulated laser; nonlinear distortion; optoelectronic interferometer; performance enhancement; triple-beat signal suppression; Chromatic dispersion; Emulation; Fiber nonlinear optics; Laser noise; Nonlinear distortion; Nonlinear optics; Optical distortion; Optical modulation; Optical transmitters; Signal generators;
Journal_Title :
Photonics Technology Letters, IEEE
