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arXiv 0901.4856physics.ins-detphysics.optics
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通过锁定到optical fiber延迟线实现超低频噪声laser

Ultra low frequency noise laser by locking to an optical fiber delay line

Fabien Kéfélian, Haifeng Jiang, Pierre Lemonde, Giorgio Santarelli

摘要:

报道了利用大臂不平衡的全光纤迈克耳孙干涉仪对掺铒光纤分布反馈激光器进行稳频的实验研究。该干涉仪使用一个1公里的SMF-28光纤线轴和声光调制器,允许外差检测。对于1 Hz ~ 10 kHz的傅立叶频率,频率噪声功率谱密度降低了40 dB以上,对应于整个范围内远低于1 Hz^2/Hz的水平。在1 kHz时可达到10^{-2} Hz^2/Hz。在40 Hz和30 kHz之间,频率噪声被示出为与通过Pound-Drever-Hall锁定到高精细度Fabry-Perot腔获得的频率噪声相当。因此,锁定到光纤延迟线可以代表用于短期线宽减小的腔稳定的可靠、简单和紧凑的替代方案。

英文摘要:

We report the frequency stabilization of an erbium-doped fiber distributed-feedback laser using an all-fiber based Michelson interferometer of large arm imbalance. The interferometer uses a 1 km SMF-28 optical fiber spool and an acousto optic modulator allowing heterodyne detection. The frequency noise power spectral density is reduced by more than 40 dB for Fourier frequencies ranging from 1 Hz to 10 kHz, corresponding to a level well below 1 Hz^2/Hz over the whole range. It reaches 10^{-2} Hz^2/Hz at 1 kHz. Between 40 Hz and 30 kHz, the frequency noise is shown to be comparable to the one obtained by Pound-Drever-Hall locking to a high finesse Fabry-Perot cavity. Locking to a fiber delay line could consequently represent a reliable, simple and compact alternative to cavity stabilization for short term linewidth reduction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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