The dynamical behavior of self-mixing by Doppler feedback in single-mode microchip Nd:YAG laser

In this work we present experimental observation of self-mixing laser Doppler velocimetry (LDV) with laser-diode-pumped single-mode microchip Nd:YAG laser. The temporal waveforms are detected by oscilloscope, and proceed with Fourier transform spectrum analysis and local maximum analysis. The result displays the period transformation of intensity fluctuation which is observed via spectrum analysis and local maximum analysis.