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Multiple frequency-swept source based on recirculating frequency shifter loop
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Paper Abstract

A multiple frequency-swept source based on a recirculating frequency shifter loop (RFSL) is established. Three distributed feedback (DFB) lasers are used as a seed source and sweep in the RFSL synchronously. The swept spectra of the separate DFB lasers are precisely controlled and stitch together without overlap. The key significance of this technique is that the swept range increases as the number of the multiple seed wavelengths increase. Experimentally, the swept range of our system can broaden to 4.5 nm/3.9 nm with an 8.6 GHz/7.5 GHz swept step. The swept rate is 200 kHz. The output of the source is sent into a Mach-Zehnder interferometer and the interference signal is detected to measure the length difference of interferometer arms.

Paper Details

Date Published: 1 March 2019
PDF: 6 pages
Proc. SPIE 10917, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XII, 109171Q (1 March 2019); doi: 10.1117/12.2507243
Show Author Affiliations
Quan Yuan, Tianjin Univ. (China)
Zhaoying Wang, Tianjin Univ. (China)
Qiyu Wang, Tianjin Univ. (China)
Tianxin Yang, Tianjin Univ. (China)
Zhaoyu Lu, Tianjin Univ. (China)
Diannan Hu, Tianjin Univ. (China)
Jiaqi Qin, Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 10917:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XII
Laurence P. Sadwick; Tianxin Yang, Editor(s)

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