Title :
Capacity limits imposed by intermodulation distortion on QAM SCM systems utilizing an optically linearized Mach-Zehnder modulator as transmitter
Author_Institution :
Crawford Hill Lab., AT&T Bell Labs., Holmdel, NJ, USA
Abstract :
Summary form only given. Subcarrier multiplexed (SCM) systems at 1.55 /spl mu/m with a combination of amplitude modulation-vestigial sideband (AM-VSB) and QAM channels using a Mach-Zehnder (MZ) modulator have been demonstrated. Here, we calculate, for the first time to our knowledge, the ultimate limit that the intermodulation distortion (LMD) of an optically-linearized Mach-Zehnder externally-modulated laser imposes on the opacity of an all-optical AM system and determine the required received optical power.
Keywords :
quadrature amplitude modulation; 1.55 mum; QAM SCM systems; QAM channels; all-optical AM system; amplitude modulation-vestigial sideband; capacity limits; intermodulation distortion; optical transmitter; optically linearized Mach-Zehnder modulator; optically-linearized Mach-Zehnder externally-modulated laser; received optical power; subcarrier multiplexed systems; Electron optics; Intermodulation distortion; Laser noise; Nonlinear optics; Optical distortion; Optical modulation; Optical receivers; Optical transmitters; Quadrature amplitude modulation; Stimulated emission;
Conference_Titel :
Optical Fiber Communication Conference and Exhibit, 1998. OFC '98., Technical Digest
Conference_Location :
San Jose, CA, USA
Print_ISBN :
1-55752-521-8
DOI :
10.1109/OFC.1998.657227
