Laser & Optoelectronics Progress, Volume. 48, Issue 3, 30601(2011)
Autocorrelation-Based Velocity Measurement of Self-Mixing Speckle in Fiber Ring Laser
Autocorrelation-based velocity measurement is studied with self-mixing speckle in an erbium-doped ring laser. The autocorrelation function of self-mixing speckle is deduced using the optical feedback theory of fiber ring laser, and a relation between the autocorrelation frequency of speckle signals and the velocities of moving object is theoretically obtained. Utilizing the experimental system based on an erbium-doped fiber(EDF) ring laser, the velocity measurement is carried out toward a dynamic target with different velocities. Linear relationship between autocorrelation frequency and the velocity of the target is proved. The result indicates that the autocorrelation of self-mixing speckle in a fiber ring laser can be applied to velocity measurement.
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Chen Shijia, Han Daofu, Ma Li. Autocorrelation-Based Velocity Measurement of Self-Mixing Speckle in Fiber Ring Laser[J]. Laser & Optoelectronics Progress, 2011, 48(3): 30601
Category: Fiber Optics and Optical Communications
Received: Nov. 22, 2010
Accepted: --
Published Online: Jan. 18, 2011
The Author Email: Shijia Chen (csj3196@163.com)