Abstract
Frequency tuning and stability properties of single- and multi-cavity designs have been investigated theoretically and experimentally. Special attention is paid to a dual coupled cavity single-frequency diode-pumped solid-state Nd:YVO 4 laser crystal. 350 mW single frequency output power has previously been demonstrated using dual coupled linear cavity. Frequency tuning versus temperature and cavity length of a coupled cavity Nd:YVO 4 have been investigated and compared to those of a non-planar monolithic, unidirectional Nd:YAG ring laser. A way to extend the tuning range by design of the air to crystal length ratio is proposed. Finally the long term frequency stability of both lasers has been measured. The stability of the lasers are presented through the Allan variance of the frequency fluctuations.
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