Effect of Optical Delay on the Suppression of the Power Transient Excursion in a Combined Gain-Controlled Erbium-Doped Fiber Amplifier, ETRI Journal, vol.25, no.6, Dec. 2003, pp.531-534.

Effect of Optical Delay on the Suppression of the Power Transient Excursion in a Combined Gain-Controlled Erbium-Doped Fiber Amplifier

Hee Sang Chung, Sun Hyok Chang, Heuk Park, Hyun Jae Lee, and Moo-Jung Chu

Abstract :

This report describes the effect of optical delay on the suppression of the power transient excursion in a combined gain-controlled erbium-doped fiber amplifier with an internal optical feedback loop (OFL). A simple homogeneous model showed that the optical delay caused a phase change in the oscillation of the surviving and laser channels, which resulted in a reduction of the overall power transient excursion. In addition to the reduction, a real system with a 1528.7-nm OFL shifted the oscillation upward or downward according to channel removal or addition, whereas another one with a 1560.9-nm OFL did not. This different transient behavior reflected a control-wavelength dependence on optical automatic gain control, where spectral-hole burning dominated over relaxation oscillation for 1528.7 nm, and vice versa for 1560.9 nm.

Key word :

Optical delay, power transient, gain control, EDFA.

DOI :

http://dx.doi.org/10.4218/etrij.03.0203.0016

Cite this :

Hee Sang Chung, Sun Hyok Chang, Heuk Park, Hyun Jae Lee, and Moo-Jung Chu, "Effect of Optical Delay on the Suppression of the Power Transient Excursion in a Combined Gain-Controlled Erbium-Doped Fiber Amplifier," ETRI Journal, vol. 25, no. 6, Dec. 2003, pp. 531-534.
http://dx.doi.org/10.4218/etrij.03.0203.0016

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