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Proceedings Paper

Novel method of generation of linear frequency modulation optical waveforms with swept range of over 200 GHz for lidar systems
Author(s): Yuchen Zhang; Tianxin Yang; Tianhe Wang; Zhaoying Wang; Dongfang Jia; Chunfeng Ge
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Paper Abstract

Light detection and ranging (lidar) is used for various applications such as remote sensing, altimetry and imaging. Continuous wave frequency modulated (CWFM) lidars rely on linearly ramping the optical frequency of a laser and interfering the delayed echo signal with a reference signal to produce a beat frequency. The range resolution of lidar is determined by the swept frequency range of the linearly chirped continuous light waves in a frequency modulation system. For example, for 1mm range resolution, it needs the frequency sweep range of more than 150 GHz. In this paper a system which can generate a linearly chirped optical waveform within a super broad-wide band of 200 GHz, using cascaded phase modulators (PM) and single side band (SSB) modulator, is designed as a light source in a high resolution lidar system.

Paper Details

Date Published: 28 April 2015
PDF: 11 pages
Proc. SPIE 9362, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VIII, 93620J (28 April 2015); doi: 10.1117/12.2078205
Show Author Affiliations
Yuchen Zhang, Tianjin Univ. (China)
Tianxin Yang, Tianjin Univ. (China)
Tianhe Wang, Tianjin Univ. (China)
Zhaoying Wang, Tianjin Univ. (China)
Dongfang Jia, Tianjin Univ. (China)
Chunfeng Ge, Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 9362:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VIII
Laurence P. Sadwick; Tianxin Yang, Editor(s)

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