1 November 1997 Application of LD-pumped Nd:YVO4 microchip laser for absolute distance measurement
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A frequency shift interferometer for absolute distance measurement using LD-pumped Nd:YVO4, microchip laser is proposed in this paper. The LD pumped Nd:YVO4 crystal microchip laser here is an external cavity laser. By modulating the voltage supplied to PZT, the frequency of the laser beam is modulated. A frequency shift interferometer using the technique of frequency-modulated continuous-wave is established. In this experiment setup a reference interferometer is used to compensate for the drift of the central frequency of the laser. The experimental results show that drift of central frequency of the laser affects the accuracy of the measurement a lot and can be compensated effectively. But influence from the drift of frequency modulation ratio tot eh accuracy can not be compensated.
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Yang Zhao, Yang Zhao, Yan Chen, Yan Chen, } "Application of LD-pumped Nd:YVO4 microchip laser for absolute distance measurement", Proc. SPIE 3134, Optical Manufacturing and Testing II, (1 November 1997); doi: 10.1117/12.279136; https://doi.org/10.1117/12.279136

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