本論文中利用連續波雷射與似噪音光纖脈衝輻照進行能隙工程研究。我也建立了理論架構以分析及推斷實驗數據。以連續波雷射(λ=915 nm)退火實驗時，當雷射輸出功率密度為22 W/mm2 且掃描速度為0.2 mm/s來回掃描10分鐘時，可以在InGaAs/AlGaAs雷射二極體結構中實現量子井混合並達163 meV的能量藍移，然而譜線光致發光強度下降約47%且樣品表面因熱累積造成表面損壞。似噪音脈衝可由全正色散摻鐿光纖雷射產生，我們架設平均輸出功率可達400 mW(脈衝重複率為3.18 MHz)，脈衝之具雙尺度，具149皮秒之底座及~137飛秒之尖峰自相關曲線，頻寬為21 nm，透過光纖放大器，雷射輸出功率可以提昇至2.56 W，脈衝能量為0.63微焦耳。利用此光源當似噪音脈衝雷射輸出能量密度為1.66 µJ/mm2 且掃描速度為0.2 mm/s來回掃描10分鐘時，可以在雷射二極體結構中有效實現量子井混合並達到133 meV的能量偏移且光致發光光譜強度僅下降約22%，並且樣品表面並未損壞，這顯示此製程可供高功率雷射光強非吸收窗口之用，以避免光學災變。

In this thesis, we investigate in bandgap engineering by continuous-wave laser and noise-like pulse laser irradiation. We have also built a theoretical framework for analyzing and evaluating experimental data. The continuous-wave laser (λ=915 nm) annealing experiment perform in the condition that laser output power density is 22 W/mm2 and that the scanning speed is 0.2 mm/s back and forth which last for 10 minutes on InGaAs/AlGaAs laser diode structure. The quantum-well intermixing (QWI) was achieved in the medium and the energy blue shift reached 163 meV. However, the PL spectrum intensity reduced 47 % due to the heat-accumulation induced surface damage. Noise-like pulse can be generated by all-normal dispersion ytterbium-doped fiber laser. This laser can generate the noise-like pulse with output power up to 400 mW, spectral width of 21 nm and double scale pulse duration of 149 ps and 137 fs at a repetition rate of 3.18 MHz. By using pre-amplifier, the laser output power can be scale up to 2.56 W, corresponding single pule energy of 0.63 µJ. In the case that the laser fluence on 1.66 µJ/mm2 and the scanning speed on 0.2 mm/s back and forth for 10 minutes, the QWI can be effectively achieved. The energy shift of QWI is 133 meV, and PL spectrum intensity only reduced 22 % with no surface damage. This shows that the process can be used for high-power laser intensity non-absorbing mirror to avoid catastrophic optical damage (COD).

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