Optical microsphere amplification system.
Optical microsphere amplification system.
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DOI：
10.1364/ol.32.003197
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发表时间：
2007-11
期刊：
影响因子：
3.6
通讯作者：
K. Totsuka;M. Tomita
中科院分区：
文献类型：
--
作者：
K. Totsuka;M. Tomita
我们展示了一个紧凑的光放大系统，使用光纤锥和稀土掺杂微球。信号光和泵浦光通过光纤锥注入微球，以增加两个回音壁模式之间的空间匹配。随着抽运功率的增加，由于微球内固有衰减引起的透射谱中的共振谷被填充，然后过渡到共振增益峰。用直径为63 μ m的微球实现了高达2.5的放大因子。
We demonstrated a compact optical amplification system using a fiber taper and rare-earth-doped microsphere. Both the signal and pump beams were injected into the microsphere via the fiber taper to increase the spatial matching between two whispering gallery modes. As the pump power was increased, the resonance dip in the transmission spectra due to intrinsic attenuation in the microsphere became filled and then transited to the resonance gain peak. An amplification factor of up to 2.5 was realized with a microsphere of 63 microm in diameter.