Galindo-Santos J, Velasco A V, Corredera P
Instituto de Óptica IO-CSIC, C/Serrano 121, 28006 Madrid, Spain.
Rev Sci Instrum. 2015 Jan;86(1):013104. doi: 10.1063/1.4904973.
Self-referenced optical frequency combs enable the measurement of optical frequencies with a very high accuracy, achieving uncertainties close to the atomic clock used as reference (<10(-13) s). In this paper, we present the technique for the measurement of laser frequencies for optical communications followed at IO-CSIC and its application to the calibration of two wavemeters in the 1.5 μm optical communication window. Calibration uncertainties down to 12 MHz and 59 MHz were obtained, respectively, for each of the devices. Furthermore, the long-term behaviour of the higher resolution wavemeter was studied during a 750 h period of sustained operation, exhibiting a dispersion in the measurements of 7.72 MHz. Temperature dependence of the device was analysed, enabling to further reduce dispersion down to a 2.15 MHz range, with no significant temporal deviations.
自参考光学频率梳能够以非常高的精度测量光频率，实现接近用作参考的原子钟的不确定度（<10^(-13) 秒）。在本文中，我们介绍了在西班牙国家研究委员会光学研究所（IO-CSIC）采用的用于测量光通信激光频率的技术及其在1.5μm光通信窗口中两台波长计校准的应用。分别为每个设备获得了低至12 MHz和59 MHz的校准不确定度。此外，在750小时的持续运行期间研究了高分辨率波长计的长期性能，测量结果的离散度为7.72 MHz。分析了该设备的温度依赖性，能够将离散度进一步降低至2.15 MHz范围，且无明显的时间偏差。
