Abstract
A scheme for measuring the intra-cavity round-trip loss of an
all-solid-state single-frequency laser by inserting a type-I noncritical
phase-matching nonlinear crystal introducing nonlinear loss into the
resonator is presented. The intra-cavity round-trip loss is theoretically
deduced by analyzing the dependence of the fundamental-wave (FW) and
second-harmonic-wave (SHW) powers on the pump factor and the nonlinear
conversion factor of the single-frequency laser and experimentally
measuring them by recording different FW and SHW powers, which are decided
by the temperature of the nonlinear crystal. The measured intra-cavity
round-trip loss and pump factor are 4.84% and 6.91% W−1,
respectively. The standard deviations of the measured intra-cavity
round-trip loss and the pump factor are 0.26% and 0.07%, respectively.
This scheme is very suitable for measuring the intra-cavity round-trip
loss of a high-gain solid-state single-frequency laser.
© 2017 Chinese Laser Press
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