| Summary: | 碩士 === 國立中山大學 === 光電(科學)研究所 === 84 === Compact, all-solid-state, mode-locked Nd:YLF laser can generate
high peak power and ultrashort pulses that particularly well
adapted for various applications in electronics, biology,
chemistry, physics, etc.In this thesis, we present a frequency-
shifted phase-locked loop that actively stabilized the timing
of an acousto -optically mode-locked laser. The frequency
offset is establized between the laser repetition rate and
twice of the mode-locker frequency. Since the frequency off-
set is easily tunable, this approach can be applied to various
real-time measurement systems. Compared to con- ventional pump
and probe mearsurement technique, this technique has fasten
measurement speed and longer wav- eform sampling range. The
active feedback scheme, which compensates thermal and
mechanical drifts of the reso- natorand reduces the warm-up
time of laser, stabilizes thelaser pulse repetition rate.
Therefore, long-term stability if this ultrashort laser is
maintained.The novel timing stailization scheme shouldbe
applicable for most actively mode-locked laser.
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