增益箝制與平坦化的摻餌光纖放大器及光纖雷射之研究

Study of Gain Flattened and Clamped Erbium-Doped Fiber Amplifier and Fiber Laser

黃珽瓚(Ting-Tsan Huang)

指導教授 ： 祁甡

共同指導教授 ： 柯正浩(Chen-Hao Ko)

元智大學/工程學院/光電工程研究所/碩士(2006年)

摘要

本論文的第一部份提出一可同時達到增益箝制與平坦化之二級摻鉺光放大器模組，在操作波長 1530 nm 至 1564 nm 之間時，分別以輸入功率 -15 dBm 及 -40 dBm 的光訊號注入系統，可在此波段得到最大增益變化量分別為 0.8 dB 及 1.8 dB。同時我們觀察以輸入光功率 -15 dBm 至 -40 dBm 的範圍注入系統，對單一波長之最大增益差發生在波長 1556 nm，其增益差值為 2.7 dB。
在第二個部份，我們利用三環迴路型雷射架構提出一可調且穩定之S頻段單縱模摻鉺光纖放大器，藉由不同共振腔長度所形成的共振條件可使此架構達到單縱模之輸出。同時我們在主環腔內放置一可調的 Fabry-Perot 濾波器，使此架構達成可調且穩定的雷射輸出。

關鍵字

摻餌光纖放大器 ； 迴路雷射

並列摘要

In the first part of the thesis, we propose and investigate experimentally a gain-flattened and gain-clamped two-stage erbium-based fiber amplifier (EBFA) module. The maximum gain variations of ±0.8 and ±1.8 dB are observed in an operating range of 1530 to 1564 nm, when the input signal powers are 15 and ?{40 dBm, respectively. In a 25 dB dynamics input signal power range from ?{15 to ?{40 dBm over the operating range, the maximal gain difference of 2.7 dB is also retrieved at 1556 nm for the GF and GC erbium amplifier.
In the second part of the thesis, We propose and demonstrate a tunable and stable single-longitudinal-mode (SLM) erbium fiber laser with a passive triple-ring cavity structure in S-band operation. The proposed laser is fundamentally structured by using three different lengths of ring cavities, which serve as the mode filters. When a mode-restricting intracavity fiber Fabry-Perot tunable filter (FFP-TF) is combined, the proposed resonator can guarantee a tunable and stable SLM laser oscillation.

並列關鍵字

EDFA ； Fiber Ring Laser

參考文獻

[1]G. Keiser, “Optical Fiber Communications,” 3rd ed., McGraw-Hill, New York, 2000.

[2]S. Shimada, H. Ishio, “Optical Amplifiers and their Applications,” John Wily & Sons, New York, 1994.

[3]P. C. Becker, N. A. Olsson, and J. R. Simpson, “Erbium-Doped Fiber Amplifiers Fundamentals and Technology,” Academic Press, 1999.

[4]M. Cai, X. Liu, J. Cui, M. Leblance, P. Tang, and J. Peng, “Study on Noise Characteristic of Gain-Clamped Erbium-Doped Fiber-Ring Lasing Amplifier,” IEEE Photon. Technol. Lett., vol. 9, pp. 1093-1095, 1997.

[5]Zirngibl, “Gain control in erbium-doped fiber amplifiers by an all optical feedback loop,” Electron. Lett., vol. 27, no. 7, pp. 560–561, 1991.