使用梳状注入锁定技术对光学频率梳进行直接比较。

Direct comparison of optical frequency combs using a comb-injection-lock technique.

作者信息

Kim E B, Lee W K, Park C Y, Yu D H, Lee S K, Park S E

机构信息

Division of physical Metrology, Korea Research Institute of Standards and Science,1 Doryong-Dong, Yuseong-Gu, Daejeon 305-340, Korea.

出版信息

Opt Express. 2008 Jul 7;16(14):10721-7. doi: 10.1364/oe.16.010721.

DOI:10.1364/oe.16.010721

PMID:18607488

Abstract

This paper demonstrates a direct comparison of optical frequency combs (OFCs) with different repetition rates without a stable intermediate laser using a single-mode comb-injection-lock technique. Two OFCs based on Ti:Sapphire mode-locked lasers were compared utilizing a single-mode diode laser for the selection and the amplification of one mode of an OFC by comb-injection, which makes the direct comb comparison possible. The frequencies of the two combs were found to agree within 0.019 Hz at 352 THz with the uncertainty of 0.25 Hz (7.1 x 10(-16) ). This is one of the best results among the comparisons of combs referenced to a microwave frequency. This technique simplifies the comb comparison utilities and can be applied even when repetition rates differ.

摘要

本文展示了一种使用单模梳状注入锁定技术，在没有稳定中间激光器的情况下，对不同重复频率的光学频率梳（OFC）进行直接比较的方法。利用基于钛宝石锁模激光器的两个OFC，通过梳状注入，使用单模二极管激光器来选择和放大其中一个OFC的模式，从而实现了两个梳状频率的直接比较。结果发现，在352太赫兹时，两个频率梳的频率在0.019赫兹范围内一致，不确定度为0.25赫兹（7.1×10⁻¹⁶）。这是在参考微波频率的频率梳比较中最好的结果之一。该技术简化了频率梳比较工具，即使在重复频率不同时也可应用。