本論文由實驗觀察，證明利用鉺離子為雷射增益介質的摻鉺光纖，有可能實現了雙光子激發之綠光雷射。
由980 nm泵激雷射激發摻鉺光纖所產生的上轉換發光效應，從鉺離子能階分析和實驗結果表明摻鉺光纖中的綠色螢光放射本質為上轉換發光，波長為547 nm和537 nm，其產生機制為激發態吸收效應，由理論和實驗兩方面分析摻鉺光纖放大器(EDFA)泵激功率和信號功率這兩個放大參數對上轉換綠色螢光的影響，並利用MATLAB數值軟體，模擬分析鉺離子居量反轉與光纖的最佳長度。由實驗與模擬得知，用於上轉換機制的掺鉺光纖最佳長度為8 m (Fibercore EDF-M5)，而用於摻鉺光纖放大器最佳長度應為2 m (Fibercore EDF-DF1500L)。
藉由雷射震盪模型，試推導出在上轉換機制下內藏於其中的ASE現象，經由實驗觀察螢光放射彼此間的競合，證實上轉換機制下可產生一串接的雷射波長，此結果使我們嘗試設計一綠光雷射，其共振腔反射波長可成功讓800 nm及1530 nm高穿透率，則可避免兩者螢光在共振腔裡與綠光螢光產生模態競爭。結合磊晶布拉格反射鏡作為雷射之共振腔，初步做出由980 nm雷射泵激摻鉺光纖產生的上轉換綠光雷射。實驗結果得到使用摻鉺光纖8 m、泵激功率150 mW、共振腔兩面反射率為99%及50%時，綠光雷射輸出功率為70.29 mW。未來有望實現綠光上轉換光纖雷射。

In this thesis, we have achieved observing the visible upconversion emissions of an erbium-doped fiber (EDF) under 980 nm infrared laser excitations. A green upconversion erbium-doped fiber laser with two-photon stimulation is being established successfully.
Analysis show that the upconversion fluorescence is green light one with wavelengths of 547 nm and 537 nm due to excited state absorption (ESA). Both theoretical and experimental studies are carried out to investigate the effects of signal power and pumping power on the Er3+ doped fiber amplifier (EDFA) caused by green fluorescence. We also simulated to get an optimal length of population inversions by Matlab software.Based on the experimental and simulated results, the most suitable length of EDF is suggested to be 8m that absorption 5dB/m at pump wavelength in green upconversion fluorescence schemes and conclude EDFA pumped at 980 nm has an optimal length is 2m that absorption 12 dB/m.
To clarify the effect of the amplified spontaneous emission (ASE) spectra of oscillator model, we obtained cascaded free-running two-wavelength 800 nm and 1530 nm lasing from EDF. From the results of cascaded lasers, we obtained the effects of 800 nm and 1530 nm emissions should be considered for constructing a green upconversion laser. That is to say, for low-power operation of a green laser, the effects of 800 nm and 1530 nm emissions are not a big problem. Even so, it is better that the cavity mirrors for green laser are designed as high transmission at 800- and 1530 nm to avoid the competition between green laser and cascaded 800 nm and 1530nm emissions. We assumed that such a cavity with combination of distributed Bragg reflectors (DBR) mirror can support green lasing.Experimentally study the green upconversion laser, using DBR mirror of 99% and 50% reflectivity as well as 8m EDF in 150mW pump power and 70.29mW green laser output power are achieved.

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