本論文展示了一組30米長的摻鉺光纖製成的正色散光纖振盪器在不同操作模態下的量測。最高能量(中心波長位於1568奈米)與最寬頻譜(中心波長位於1579奈米)分別為33奈焦耳及60奈米，使用超短脈衝塑形器壓縮輸出的脈衝序列分別壓縮至150.5飛秒及116.4飛秒。在高能量模態下使用效率36%的雙程光柵對，33奈焦耳的脈衝序列被壓縮至155.8飛秒的脈衝寬，在次脈衝或背景光雜訊不存在的狀況下使脈衝序列達到47千瓦的尖峰功率，為目前摻鉺光纖震盪器的世界紀錄。我們也透過如二倍頻產生、長距離自相干涉訊號量測、射頻頻譜分析等等的方式監測脈衝序列的品質，發現存在於高能量脈衝序列中的次脈衝及背景光雜訊，而透過降低泵浦及調整腔內偏振態，可以產生較為乾淨的脈衝序列。

A normal dispersion fiber oscillator with 30-m-long erbium-doped gain fiber was demonstrated in different operation modes. The highest pulse energy and the broadest spectral width were 33 nJ and 60 nm (centered at 1568 nm and 1579 nm), respectively. The output pulses of high-energy and broad-bandwidth modes were compressed to the corresponding Fourier transform limits by an ultrashort pulse shaper, achieving 150.5 fs and 116.4 fs, respectively. On the other hand, a double-pass grating pair compressed the 33 nJ pulse to 155.8 fs with 36% throughput. This would enable a record peak power of 47 kW (for erbium-doped fiber oscillators) if the pulse train is free of undesired sub-pulses or background. We also investigated the pulse train quality by a series of experiments, such as second-harmonic generation, long-range intensity autocorrelation, and radio-frequency spectrum measurement, showing that the high-energy pulse train could be subject to significant sub-pulses or background noise. A cleaner pulse train could be obtained at lower pump power by changing the intracavity polarization states.

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