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采用一种新颖的双光栅装置作为外腔调谐结构 ,实现了掺Yb3+ 双包层光纤激光器的调谐输出 ,调谐范围10 37～ 110 6nm。双光栅结构的应用 ,使调谐输出的激光光谱的线宽大大变窄 ,小于 0 1nm。检偏器测量结果表明 ,整个调谐范围内的激光输出均为线偏振光。
A novel double grating device is adopted as the external cavity tuning structure to realize the tuned output of the Yb3 + double clad fiber laser. The tuning range is from 10 37 to 110 6 nm. The application of double grating structure makes the linewidth of the laser spectrum of the tuned output narrow greatly, less than 0 1nm. The analyzer measurements show that the laser output is linearly polarized over the entire tuning range.