Title :
The use of semiconductor-optical-amplifiers for long optical links in the CATV upstream optical network
Author_Institution :
Philips Broadband Networks Inc., Manlins, NY, USA
Abstract :
The use of 1550-mm external transmitters and optical amplifiers in the CATV downstream system leads to long and high-loss optical links for upstream transmission. Additionally, the deployment of internet services has increased the constraints on the upstream optical link. These two-system characteristics, taken together, require a new approach for the upstream optical link. In this letter, we present the use of semiconductor optical amplifiers (SOAs) to overcome these constraints. We show, through experiment and theory, that a SOA used as an optical preamplifier increases the dynamic operating window 11 dB for optical links of 85 km.
Keywords :
Internet; cable television; optical fibre subscriber loops; optical transmitters; 1550 nm; 1550-mm external transmitters; 85 km; CATV downstream system; CATV upstream optical network; dynamic operating window; high-loss optical links; internet services; long optical links; optical amplifiers; optical links; optical preamplifier; semiconductor optical amplifiers; semiconductor-optical-amplifiers; two-system characteristics; upstream transmission; Optical feedback; Optical fiber communication; Optical fiber networks; Optical filters; Optical receivers; Optical saturation; Optical transmitters; Preamplifiers; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
