In the past few decades, multifunctional optical crystals for all-solid-state Raman lasers have been widely studied by many scholars due to their compactness, convenience and excellent performance. this review, we briefly show two kinds of crystals: self-Raman (laser effects) self-frequency-doubled (frequency-doubling crystals. We firstly introduce properties laser crystals, including vanadate,...

Four patients with minocycline-induced cutaneous pigmentation were treated with the Q-switched ruby laser. The pigmentation resolved and there was no adverse effects.