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Proceedings Paper

Active sensing of DBR laser with self-mixing interference
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Paper Abstract

In recent years, active sensing, which emits radiation directed toward the target to be investigated, has attracted more and more attention. Laser is not only as a light source, but also as a sensitive element viz. sensing source presented in the active sensing system which based on the theory of self-mixing interference in this paper. This application can make the sensing system more simple, compact, and less cost. In this paper, we propose the active sensing by the combination of DBR lasers and the self-mixing interference technique. The self-mixing interference in DBR lasers based on the study of F-P cavity and coupling wave equations has been analyzed. Three self-mixing interference models in DBR lasers are presented, and one of them has been taken for instance to simulate the output variations of self-mixing interference. The influence from different internal or external parameters on the output variations and the inclination degree of waveform of the active sensing were discussed in simulation also. And thereby good signal of self-mixing interference in DBR lasers can be obtained. This application can satisfies the request of microminiaturized sensing device and the demand of interrogation of optical fiber, and predigests the structure of sensing system.

Paper Details

Date Published: 5 March 2007
PDF: 6 pages
Proc. SPIE 6595, Fundamental Problems of Optoelectronics and Microelectronics III, 65953Z (5 March 2007); doi: 10.1117/12.726497
Show Author Affiliations
Junping Zhou, Nanjing Normal Univ. (China)
Ming Wang, Nanjing Normal Univ. (China)
Daofu Han, Nanjing Normal Univ. (China)


Published in SPIE Proceedings Vol. 6595:
Fundamental Problems of Optoelectronics and Microelectronics III

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