Title :
Point-to-multipoint distributions of 42 channel VSB-AM video signals using an erbium-doped fiber amplifier
Author :
Huang, S.Y. ; Cline, T.W. ; Upadhyayula, L.C. ; Tench, R.E. ; Lipson, J. ; Simpson, J.R.
Author_Institution :
AT&T Bell Lab., Solid State Technol. Center, Breinigsville, PA, USA
Abstract :
It is demonstrated that an erbium-doped fiber amplifier (EDFA) can be successfully used as a power amplifier for point-to-multipoint distributions of 42-channel VSB-AM video signals. The amplifier has a 31.4-dB net small-signal gain and 6.1-dBm saturated power. When used as a power amplifier, the EDFA is heavily saturated with a 19.2-dB gain compression and 12.2-dBm output power. The total optical power budget is 20 dB at CNR of 50 dB. Both composite-triple-bit and composite-second-order distortions after the amplifier and splitter are about or above 60 dBc. The possibility of cascading these fiber amplifiers and branching their outputs makes them well suited for tree-and-branch-like CATV distribution systems.<>
Keywords :
amplitude modulation; cable television; fibre lasers; optical links; optical modulation; video signals; 31.4 dB; 42 channel VSB-AM video signals; CATV distribution systems; EDFA; Er doped fibre amplifier; cascading; composite triple bit distortions; composite-second-order distortions; gain compression; optical power budget; output branching; output power; point-to-multipoint distributions; power amplifier; small-signal gain; Distributed amplifiers; Erbium-doped fiber amplifier; Optical amplifiers; Optical distortion; Optical fiber amplifiers; Optical saturation; Power amplifiers; Power generation; Stimulated emission; Video compression;
Conference_Titel :
Broadband Analog Optoelectronics: Devices and Systems, 1990. Conference Digest., LEOS Summer Topical on
Conference_Location :
Monterey, CA, USA
DOI :
10.1109/BAODS.1990.205496
