本論文研製一寬頻的高能脈衝雷射，根據傅立葉轉換原理可知道當脈衝寬度越窄的情況下能得到頻寬越大的脈衝輸出，因此本文架設一被動式偏振疊加波鎖模雷射來產生鎖模雷射，並透過不同的架構元件修改後找出一種輸出表現最佳的架構，其脈衝的中心波長約在1560 nm附近，屬於C-Band波段，當泵激雷射電流操作在200 mA下，其輸出功率約為71.75 mW，透過耦合分光器之分光比的參數調整可後得到最佳頻寬輸出，3 dB頻譜寬度為6.24 nm、脈衝寬度427 fs、平均輸出功率為14.96 mW、脈衝能量約1.35 nJ的被動鎖模雷射，而脈衝共振腔長度為18.53 m，脈衝重複率為11.115 MHz。
最終本論文將上述所提出之被動式偏振疊加波鎖模當作種子雷射，並以不同長度之單模光纖先將種子脈衝展寬後。再經本文所提出之高功率鉺鐿共摻光纖放大器以MOPA的方式提升脈衝的平均功率，由於展寬後能降低脈衝之尖峰功率，藉以得到更有效地放大，最後當脈衝種子雷射功率為14.96 mW且放大器泵激光源操作於3 A時， 能得到平均輸出功率為680.77 mW且脈衝能量為61.25 nJ，有效地將脈衝平均功率提升約45倍。

In this thesis, a high-power and broadband pulsed laser was designed and implemented. According to the Fourier transform principle, the 3 dB bandwidth of the pulse laser increases when the pulse width becomes narrow. Therefore, the passively mode-locked laser was built up by using the polarization additive-pulse mode-locking (APM) mechanism. Different structures and elements were designed and used to find a better configuration. The central wavelength of mode-locked pulse is at around 1560 nm (C band). Under 200 mW driving current, the obtained 3 dB bandwidth, pulse width, average power and pulse energy are 6.24 nm, 427 fs, 14.96 mW and 1.35 nJ, respectively, for the passively mode locked laser. While the measured repetition rate was approximate 11.115 MHz and the cavity length is 18.53 m.
Finally, the passively polarization APM laser as mentioned was acted as a seed laser. Then it was broaden by using single-mode fiber, and then amplified by an Er/Yb codoped MOPA. The peak power of the seed laser may be reduced by stretching the pulse width and the pulse could be amplified efficiently. At driving current of 3A for MOPA pump laser diode and 14.96 mW of seed laser power, a 680.77 mW average power and a 61.25 nJ pulse energy were generated which are 45 time scale up of the average pulse power.

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