A multipass Ti:sapphire laser amplifier pumped with homogenized Nd:YAG lasers

A speckle pattern is observed when a neodymium-doped yttrium aluminum garnet (Nd:YAG) laser is homogenized by a diffractive optical element (DOE) due to its high spatial coherence. Therefore, a Nd:YAG laser homogenized by a DOE was previously considered not suitable to pump a Ti:sapphire laser ampli