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报道了采用被动锁模光纤激光器抽运特种光纤产生超连续(SC)谱,对在4.28km色散平坦光纤(DFF),4.28kmDFF+420m高非线性光纤(HNLF)和420mHNLF+4.28kmDFF中产生的超连续谱进行比较和分析。平均抽运功率为30mW时,在420mHNLF+4.28kmDFF组合中,实现了长波长一侧的光谱234nm范围内不平坦度小于±2dB,短波长一侧的光谱195nm范围内不平坦度小于±2dB。结果表明DFF与HNLF的组合使用要比单独使用DFF获得的超连续谱谱宽更宽,平坦性更好;DFF与HNLF的连接顺序不同,所产生的超连续谱也不同;420mHNLF+4.28kmDFF这种组合更容易获得平坦的超连续谱,短波长一侧的功率显著增高。
Reported the use of passive mode-locked fiber lasers to pump special fibers to produce superconducting (SC) spectra of 4.28km dispersion-flattened fibers (DFF), 4.28km DFF + 420m high nonlinear optical fiber (HNLF) and 420mHNLF + 4.28km DFF Supercontinuum is compared and analyzed. When the average pumping power is 30 mW, the 420 nm HF + 4.28 km DFF combination achieves less than ± 2 dB of non-flatness in the 234 nm range on the long wavelength side and less than ± 2 dB on the 195 nm side of the short wavelength side. The results show that the combination of DFF and HNLF is wider and more flat than the supercontinuum spectrum obtained by using DFF alone. The order of connection between DFF and HNLF is different and the supercontinuum is different. 420mHNLF + 4.28kmDFF The combination of species makes it easier to obtain a flat supercontinuum with significantly higher power on the short wavelength side.