Title :
80ch AM-FDM signals optical transmission
Author :
Tanabe, M. ; Uno, T. ; Kaida, K. ; Nakata, H. ; Fujito, K. ; Ichida, T.
Author_Institution :
Matsushita Electr. Ind. Co. Ltd., Osaka, Japan
Abstract :
The authors investigate the laser diode (LD) over-modulation which causes composite second-order (CSO) distortion and limits the maximum number of loading channels, even if a perfectly linear LD is used. Measured results of CSO are presented as a function of modulation depth for various numbers of channels. The maximum number of channels is found for an ideal LD which has no distortion except the over-modulation area. Using newly developed distributed-feedback (DFB)-LDs for analog transmission, the authors have achieved 64-channel AM-FDM signal transmission of over 8-dB loss, with a fiber launching power of 3 mW, CNR of 51 dB, CSO of less than -60 dBc, and a CTB of less than -65 dBc.<>
Keywords :
amplitude modulation; frequency division multiplexing; optical links; optical modulation; 3 mW; 64-channel; 8 dB; 80 channels; AM-FDM signals optical transmission; DFB LD; analog transmission; composite second order distortion; fiber launching power; laser diode over modulation; linear LD; loading channels; modulation depth; Distortion measurement; Laser noise; Optical distortion; Optical feedback; Optical modulation; Optical noise; Particle beam optics; Power generation; Threshold current; Ultraviolet sources;
Conference_Titel :
Broadband Analog Optoelectronics: Devices and Systems, 1990. Conference Digest., LEOS Summer Topical on
Conference_Location :
Monterey, CA, USA
DOI :
10.1109/BAODS.1990.205495
