Lee Il-Min, Kim Namje, Lee Eui Su, Han Sang-Pil, Moon Kiwon, Park Kyung Hyun
Opt Express. 2015 Jan 26;23(2):846-58. doi: 10.1364/OE.23.000846.
In this study, inspired by the frequency-modulated continuous-wave (FMCW) method, an operation scheme of continuous-wave (CW) terahertz (THz) homodyne system is proposed and evaluated. For this purpose, we utilized the fast and stable wavelength tuning characteristics of a dual-mode laser (DML) as a beating source. Using the frequency-modulated THz waves generated by DML, a cost-effective and robust operation of CW THz system to be applicable to the measurements of thickness or refractive index of a sample is demonstrated. We believe that the proposed scheme shows a potential to the implementations of compact and fast CW THz measurement systems that can be useful in many THz applications.
在本研究中，受调频连续波（FMCW）方法的启发，提出并评估了一种连续波（CW）太赫兹（THz）零差系统的运行方案。为此，我们利用双模激光器（DML）快速稳定的波长调谐特性作为拍频源。通过使用DML产生的调频太赫兹波，证明了连续波太赫兹系统在成本效益和稳健性方面适用于样品厚度或折射率的测量。我们相信，所提出的方案对于实现紧凑快速的连续波太赫兹测量系统具有潜力，这在许多太赫兹应用中可能会很有用。
