A polarization-maintaining pedestal-free femtosecond pulse compressor incorporating an ultrafast dispersion-imbalanced nonlinear optical loop mirror
A polarization-maintaining pedestal-free femtosecond pulse compressor incorporating an ultrafast dispersion-imbalanced nonlinear optical loop mirror
复制标题
结合超快色散不平衡非线性光学环路镜的保偏无基座飞秒脉冲压缩器
DOI：
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发表时间：
2001
影响因子：
2.6
通讯作者：
M. Nakazawa
中科院分区：
文献类型：
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作者：
K. Tamura;M. Nakazawa
报道了一种基于色散渐减光纤（DDF）和色散不平衡非线性光纤环镜（DI-NOLM）的保偏色散平坦脉冲压缩器。在DI-NOLM中使用色散管理方案来减少色散扩展，这允许超短脉冲的有效切换。在10 GHz的3 ps持续时间的输入脉冲被压缩到短至140 fs的光谱宽度为56 nm，时间带宽积为0.96，平均功率为8.5 mW。该脉冲宽度受到DI-NOLM中的高阶色散的限制。采用后置滤波器和后置放大器，在平均功率为100 mW的条件下，获得了170 fs的峰值-消隐比超过35 dB的脉冲。压缩机是免调节的，这对于实际使用至关重要。
We report a polarization-maintaining and dispersion-flattened pulse compressor based on a dispersion decreasing fiber (DDF) for compression and a dispersion-imbalanced nonlinear optical loop mirror (DI-NOLM) for pedestal removal. A dispersion management scheme was used in the DI-NOLM to reduce dispersive spreading, which allows efficient switching for ultrashort pulses. Input pulses of 3 ps duration at 10 GHz were compressed to as short as 140 fs with a spectral width of 56 nm, time-bandwidth product of 0.96, and average power of 8.5 mW. This pulsewidth was limited by the higher order dispersion in the DI-NOLM. Using a post filter and a post amplifier, we obtained transform-limited 170 fs pulses at an average power of 100 mW with peak-to-pedestal ratios exceeding 35 dB. The compressor was adjustment-free, which is critical for practical use.