Measurement of frequency sweep nonlinearity using atomic absorption spectroscopy

OPTICS COMMUNICATIONS

卷:407

Article

Song, Ningfang¹  Lu, Xiangxiang¹  Xu, Xiaobin¹  Pan, Xiong¹  Li, Wei¹  Hu, Di¹  Liu, Jixun¹ 

[1] Beihang Univ, Sch Instrumentat Sci & Optoelect Engn, Beijing 100191, Peoples R China

关键词: Interferometry;    Diode lasers;    Frequency sweep nonlinearity;    Atomic absorption spectroscopy;   

DOI  :  10.1016/j.optcom.2017.09.043

来源: Elsevier

【 摘 要 】

A novel scheme to determine frequency sweep nonlinearity using atomic saturated absorption spectroscopy is proposed and demonstrated. The frequency modulation rate is determined by directly measuring the interference fringe number and the frequency gap between two atomic transition peaks of rubidium atom. An experimental setup is established, and test results show that the frequency sweep nonlinearity is similar to 10%, with an average frequency modulation rate of similar to 1.12 THz/s. Moreover, the absolute optical frequency and optical path difference between two laser beams are simultaneously determined with this method. This low-cost technique can be used for optical frequency sweep nonlinearity correction and real-time frequency monitor. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free