Chinese Journal of Lasers B, 2000, 9 (3): 219, 网络出版: 2006-08-08
Research on Theoretical Model of Linear Frequency Modulation Interferometry
Research on Theoretical Model of Linear Frequency Modulation Interferometry
摘要
Abstract
In this paper, the principle of linear frequency-modulation (LFM) with an external microcavity laser is analyzed mathematically and a method to establish the math model of LFM heterodyne interference is presented. The expression of LFM heterodyne interference is deduced by an illustration of a triangular frequency modulation. At present, one application of the LFM technique is non-guide absolute distance measurement. Experimental results of a system for absolute distance measurement based on a microchip solid laser and LFM technique are given. Based on the precisely theoretical model some effective approaches to improve the performance of LFM and decrease the measuring error are discussed.
CHEN Yan, ZHAO Yang. Research on Theoretical Model of Linear Frequency Modulation Interferometry[J]. Chinese Journal of Lasers B, 2000, 9(3): 219. CHEN Yan, ZHAO Yang. Research on Theoretical Model of Linear Frequency Modulation Interferometry[J]. 中国激光(英文版), 2000, 9(3): 219.