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Absolute frequency measurement of a 1.5-μm acetylene standard by use of a combined frequency chain and femtosecond comb

机译:结合使用频率链和飞秒梳,对1.5μm乙炔标准品进行绝对频率测量

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摘要

We have developed and characterized a pair of Doppler-free acetylene-stabilized diode laser frequency standards as optical communications references. The Allan deviation σ/f of an individual system reaches a minimum of 4×10~(-14) at a sampling time of 5000 s, and the long-term lock-point repeatability is found to be 0.4 kHz (one standard uncertainty), corresponding to a fractional uncertainty of 2×10~(-12). Using a combination of a frequency chain and a self-referenced femtosecond comb, we have measured the frequency of line P(16) of the v_(1)+v_(3) overtone band of ~(13)C_(2)H_(2) to be 194 369 569 385.9 (3.0) kHz. The uncertainty of this number is limited solely by the reproducibility of the standards.
机译:我们已经开发并确定了一对无多普勒稳定的乙炔稳定的二极管激光频率标准,作为光通信参考。单个系统的Allan偏差σ/ f在5000 s的采样时间达到最小值4×10〜(-14),并且长期锁定点可重复性为0.4 kHz(一个标准不确定度) ,对应的不确定度为2×10〜(-12)。使用频率链和自参考飞秒梳的组合,我们测量了〜(13)C_(2)H_(v_(1)+ v_(3)泛音带的行P(16)的频率2)为194369569 385.9(3.0)kHz。此数字的不确定性仅受标准可重复性的限制。

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