Stable two-frequency generation in a Nd3+:YAG laser with a phase-anisotropic cavity upon intracavity SHG in the laser frequency control mode

The operating of a two-frequency Nd³⁺:YAG laser with a phase-anisotropic cavity upon intracavity SHG (ICSHG) is considered theoretically and experimentally. It is shown that for an appropriate choice of the cavity configuration, an intensity-stabilised two-frequency lasing mode may be obtained at the first (1.064 μm) and second (0.532 μm) harmonics, with the mode interval changing continuously over a broad range.