Abstract

Schemes are proposed for the highly reliable gain control of erbium-doped fiber amplifiers (EDFAs) and for power monitoring to detect faults in wavelength-division-multiplexing (WDM) networks. These schemes employ one WDM channel (a control channel). The EDFA gain and output power levels are controlled by monitoring the control channel power that is automatically controlled and stabilized in the node. This prevents the uncontrolled EDFA operation that might result from any serious change in the control channel power. The use of a power stabilized control channel for power monitoring makes it possible to detect transmission system faults correctly because the monitoring of the control channel power is unaffected by the amplified spontaneous emission (ASE) generated in the EDFA. We also report experimental results on the dependence of the transient response of the EDFA gain and output power on the signal channel power and channel number input into the EDFA, when the power of the control channel changes due to problems with its light source. Numerical calculation of the gain transience explains the experimental results.

[IEEE ]

Optical Signal Channel Power Stability in a Transparent Optical Network Using Large-Scale Photonic Cross Connects and Automatic Gain Control EDFAs

Makoto Murakami, Takeshi Seki, and Kazuhiro Oda
J. Opt. Commun. Netw. 2(1) 20-27 (2010)

WDM burst mode signal amplification by cascaded EDFAs with transient control

Toru Yoshikawa, Kazuro Okamura, Eisuke Otani, Takeo Okaniwa, Tatsuji Uchino, Masaru Fukushima, and Nobuyuki Kagi
Opt. Express 14(11) 4650-4655 (2006)

L-band automatic-gain-controlled erbium-doped fiber amplifier utilizing C-band backward-amplified spontaneous emission and electrical feedback monitor

Jyi-Lai Shen, Yueh-Chien Lee, and Chia-Chih Huang
Appl. Opt. 48(5) 842-846 (2009)

Design and Demonstration of REAM-Based WDM-PONs With Remote Amplification and Channel Fault Monitoring

Shu-Chuan Lin, San-Liang Lee, Cheng-Kuang Liu, Chun-Liang Yang, Sun-Chien Ko, Ty-Wang Liaw, and Gerd Keiser
J. Opt. Commun. Netw. 4(4) 336-343 (2012)

Fault-detection technique in a WDM-PON

Juhee Park, Jinserk Baik, and Changhee Lee
Opt. Express 15(4) 1461-1466 (2007)