Remote Amplification in Repeaterless Transmission Systems

✍ Scribed by P.B Hansen; L Eskildsen

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 328 KB
• Volume: 3
• Category: Article
• ISSN: 1068-5200
• DOI: 10.1006/ofte.1997.0223

✦ Synopsis

Design and implementation of remotely pumped amplifiers in repeaterless transmission systems are being reviewed. Here, we discuss Raman amplifiers, as well as remote pumping of erbium-doped fiber post-and preamplifiers. Since the advent of semiconductor laser-pumped high-power sources Raman amplification has become a viable alternative to remote erbium-doped fiber amplifiers. The main advantages include simplicity and low cost of implementation as well as potential retrofitting into already installed systems. However, the optimum performance is obtained from a combination of Raman gain and remote erbium-doped fiber amplifiers. A remote preamplifier experiment including Raman amplification has, for example, demonstrated a power budget improvement of 19.7 dB. Raman amplification by itself offers approximately 7 dB of improvement.