상세정보
학술지
Effect of Optical Delay on the Suppression of the Power Transient Excursion in a Combined Gain-Controlled Erbium-Doped Fiber Amplifier
- 발행일
- 200312
- 출처
- ETRI Journal, v.25 no.6, pp.531-534
- ISSN
- 1225-6463
- 출판사
- 한국전자통신연구원 (ETRI)
- 초록
- 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, were spectral-hole burning dominated over relaxation oscillation for 1528.7 nm, and vice versa for 1560.9 nm.
- KSP 제안 키워드
- Automatic Gain Control(AGC), Feedback Loop, Hole-burning, Homogeneous model, Optical delay, Over relaxation, Phase change, Power transient, Relaxation oscillation, Transient behavior, Wavelength dependence
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