| Summary: | 碩士 === 國立高雄師範大學 === 物理學系 === 97 === WAN Xin-Jun propose that laser diode pump the Nd:YAG crystal which is applied a radial force. The longitudinal mode is split into orthogonal polarization components. Because the different radial force, the beat frequency will change.[X. J. WAN, S. L. Zhang, G. Liu,and L. G. Fei, CHIN.PHYS.LETT., vol.21, 2175 (2004)] We are interesting in how to produce the beat frequency.
At the same time, we use laser diode pump Nd:YAG solid state
laser, and take the thermal force as the radial force. We
discover the beat frequency is the high-frequency signal
numeral. We conjecture the thermal birefringence causes the
different polarizations. We discuss the behavior of the
high-frequency signal by changing the objective lens, pumping
positions, and cavity length.
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