阐述了高功率光纤激光器的特点并介绍了光子晶体光纤和螺旋芯光纤的抽运耦合方式。

The characteristics of high power fiber lasers are given and the pumping methods for photonic crystal fiber and helical-core fiber are introduced.

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发现光子的积累时间(几十毫秒量级)远大于荧光的寿命，且积累时间随抽运功率的增大而减小。

The photon response time, of the order of tens of milliseconds, is much longer than the emission lifetimes. Moreover, the response time (decreases) with the increase in excitation power.

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在测量非线性折射率和双光子吸收系数的频率分辨双光束耦合抽运探测技术中，光场的空间分布没有得到考虑。

The effects of spatial distribution on the experimental results are studied in spectrally resolved two-beam coupling pump-probe technique.

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