Real-time monitoring of continuous-wave terahertz radiation using a fiber-based, terahertz-comb-referenced spectrum analyzer
Real-time monitoring of continuous-wave terahertz radiation using a fiber-based, terahertz-comb-referenced spectrum analyzer
复制标题
DOI：
10.1364/oe.17.017034
复制
发表时间：
2009-09-14
期刊：
影响因子：
3.8
通讯作者：
Araki, Tsutomu
中科院分区：
文献类型：
--
作者：
Yasui, Takeshi;Nakamura, Ryotaro;Araki, Tsutomu
我们提出了一种基于光纤、以太赫兹梳子为基准的频谱分析仪，它具有便携、无对准、坚固耐用和灵活的优点，适合于实际应用。为此，我们构建了1550 nm锁模掺铒光纤激光器，并将其用于光导天线或电光晶体中产生高稳定的太赫兹(THz)频率梳。通过对太赫兹梳子的标准化，我们确定了有源倍频器链(AFMC)源的频率精度为2.4×10(-11)。此外，通过对AFMC光源和两个相邻波长的自由运转连续激光的光电混合光源的光谱行为的实时监测，有效地展示了THz频谱分析仪的潜力。(C)2009年美国光学学会
We propose a fiber-based, terahertz-comb-referenced spectrum analyzer which has the advantages of being a portable, alignment-free, robust, and flexible apparatus suitable for practical use. To this end, we constructed a 1550-nm mode-locked Er-doped fiber laser whose mode-locked frequency was stabilized precisely by referring to a rubidium frequency standard, and used it to generate a highly stable terahertz (THz) frequency comb in a photoconductive antenna or an electro-optic crystal. By standardizing the THz comb, we determined the frequency accuracy of an active-frequency-multiplier-chain (AFMC) source to be 2.4 x 10(-11). Furthermore, the potential of the THz spectrum analyzer was effectively demonstrated by real-time monitoring of the spectral behavior of the AFMC source and a photomixing source of two free-running CW lasers at adjacent wavelengths. (C) 2009 Optical Society of America