Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata, Japan.
Opt Lett. 2012 Sep 1;37(17):3642-4. doi: 10.1364/OL.37.003642.
We propose an ultrafast optical arbitrary waveform synthesizing/analyzing technique demonstrated with 2 Tbit/s waveforms. An ultrafast waveform was generated by manipulating the amplitude and phase of a 400 GHz optical frequency comb using a newly developed colorless optical synthesizer. The 400 GHz optical frequency comb was generated from a 25 GHz optical frequency comb using a colorless arrayed waveguide grating. This waveform was then analyzed on the frequency axis using a custom heterodyne-detection technique based on the dual-heterodyne mixing method. The phase and amplitude spectra can be observed in parallel using another optical frequency comb as a reference combined with an arrayed waveguide grating. This optical system, named the ultrafast optical frequency comb synthesizer and analyzer, can synthesize and analyze an arbitrary waveform in the THz frequency region.
我们提出了一种超快光任意波形合成/分析技术，并用 2 Tbit/s 波形进行了演示。通过使用新开发的无色光合成器来控制 400 GHz 光频梳的幅度和相位，产生了超快波形。400 GHz 光频梳是利用无色阵列波导光栅从 25 GHz 光频梳产生的。然后，使用基于双外差混合方法的定制外差检测技术在频域上对该波形进行分析。可以通过将另一个光频梳用作参考并与阵列波导光栅组合，同时观察相位和幅度谱。该光学系统称为超快光频梳合成器和分析仪，可在太赫兹频率范围内合成和分析任意波形。
