Real-time absolute frequency measurement of continuous-wave terahertz radiation based on dual...
Автор: ScienceVio
Загружено: 2015-04-23
Просмотров: 578
Real-time absolute frequency measurement of continuous-wave terahertz radiation based on dual terahertz combs of photocarriers with different frequency spacings. Takeshi Yasui et al (2015), Optics Express http://dx.doi.org/10.1364/OE.23.011367
Real-time measurement of the absolute frequency of continuous-wave terahertz (CW-THz) radiation is required for characterization and frequency calibration of practical CW-THz sources. We proposed a method for real-time monitoring of the absolute frequency of CW-THz radiation involving temporally parallel, i.e., simultaneous, measurement of two pairs of beat frequencies and laser repetition frequencies based on dual THz combs of photocarriers (PC-THz combs) with different frequency spacings. To demonstrate the method, THz-comb-referenced spectrum analyzers were constructed with a dual configuration based on dual femtosecond lasers. Regardless of the presence or absence of frequency control in the PC-THz combs, a frequency precision of 10−11 was achieved at a measurement rate of 100 Hz. Furthermore, large fluctuation of the CW-THz frequencies, crossing several modes of the PC-THz combs, was correctly monitored in real time. The proposed method will be a powerful tool for the research and development of practical CW-THz sources, and other applications.
Good channel: / dlium
Subscribe, like and comment.
Good website: https://www.dlium.com
Bookmark, subscribe and comment.

Доступные форматы для скачивания:
Скачать видео mp4
-
Информация по загрузке: