摻鉺光纖環形雷射 摘要 本文利用波長980nm之半導體雷射與摻鉺光纖(Erbium-Doped Fiber)及布拉格光纖光柵(Fiber Bragg Grating)組成波長在1541.35nm、頻寬為0.25nm、雷射功率為2.3dBm的摻鉺光纖環型雷射。 利用軟體完成了不同摻鉺光纖長度、不同摻雜濃度之摻鉺光纖、不同反射率、與雷射輸出功率之模擬。當摻鉺光纖長度為15~20公尺有最佳輸出。反射率超過5dB(68.38%),雷射輸出功率遞增,低於3dB(49.88%),雷射輸出功率遞減。當摻鉺光纖達到飽和激發濃度時,會有最好的輸出。 最後利用此一環型架構比較不同廠商型號摻鉺光纖其功率穩定性及中心波長穩定性,發現Fibercore摻鉺光纖輸出功率最大,穩定性最佳。 Lucent摻鉺光纖輸出功率次之,穩定性次之。卓越摻鉺光纖輸出功率及穩定性皆差。
ABSTRACT Demonstrated here is a fiber ring laser based on 980 nm diode laser pumping ring-type configuration including a coupler and erbium-doped fiber (EDF) with single Brag-fiber grating. The optimized simulation is carried out to optimize the output power, by changing the length and the doping concentration of the EDF, the ratio of the reflection, the number and the position of the isolators. We also investigate and compare the various EDFs of different companies. The EDF of Fiber core has the best output power and the most stability of the power and the center wavelength.