Abstract: | Four kinds of currently available Nd:hosted laser passive Q-switch and mode-locking modulators: plastic dye sheet, LiF:F2− color center crystal, Cr+4 :YAG crystal and RG1000 colored glass filter were investigated in detail and summarized for comparison for the first time. The LiF:F2− crystal with outstanding annealability, long lifetime, low cost and operability at high repetition rates is highly recommended. |