Title :
Analog video distribution system with three cascaded 980 nm single-pumped EDFA´s and 73 dB power budget
Author :
Bülow, H. ; Fritschi, R. ; Heidemann, R. ; Junginger, B. ; Krimmel, H.G. ; Otterbach, J.
Author_Institution :
Alcatel SEL Res. Centre, Stuttgart, Germany
Abstract :
A FTTH (fiber to the home)-system for 35 AM-VSB (amplitude modulation vestigial sideband) PAL TV-signals is presented with three cascaded EDFAs (erbium-doped fiber amplifiers) single-pumped with commercially available 980 nm semiconductor laser diodes, with only one optical isolator per amplifier and without any optical filter. This EDFA design leads to an optical distribution system that is cost competitive as compared to coax solutions. The high-optical output power (+13 dBm) in conjunction with the low noise performance (max NF=4.5 dB) allows a 73-dB power budget for a weighted video signal to noise ratio of 45 dB. A high split count of 4*32*64*64=524288 subscribers is realized.<>
Keywords :
amplitude modulation; cable television; erbium; fibre lasers; optical links; subscriber loops; video signals; 980 nm; AM-VSB; EDFA; Er doped fibre amplifier; FTTH system; PAL TV-signals; amplitude modulation vestigial sideband; analog video distribution; cascaded single pumped EDFAs; fiber to the home; high split count; high-optical output power; low noise performance; optical distribution system; optical isolator; phase alternating line; power budget; semiconductor laser diodes; subscribers; weighted video signal to noise ratio; Amplitude modulation; Diode lasers; Erbium-doped fiber amplifier; Optical fiber subscriber loops; Optical filters; Optical modulation; Optical noise; Semiconductor optical amplifiers; Signal to noise ratio; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
