Chinese Optics Letters, 2019, 17 (4): 041101, Published Online: Apr. 15, 2019
Terahertz imaging using an optical frequency comb source Download: 711次
Abstract
Optical frequency combs, which are generated by the cascade of a phase modulator and a Mach–Zehnder intensity modulator, are used as a polychromatic signal source in the terahertz imaging system to improve imaging quality. The interference effect caused by the monochromatic wave has been greatly suppressed. The required optical power in the presented system is as low as ~ 30 % of that in the system using the Er-doped fiber amplifier as a source, which can reduce cost and protect photodiodes from damage. This work provides an effective, low power consumption, low cost, and easy way to realize terahertz imaging with high quality and can be used in future security inspections.
Dixiang Shao, Chen Yao, Tao Zhou, Rong Zhang, Zhanglong Fu, Songlin Zhuang, Juncheng Cao. Terahertz imaging using an optical frequency comb source[J]. Chinese Optics Letters, 2019, 17(4): 041101.