Complex sentence: Rhodamine 6G is often used in a laser dye pumped by the 2nd (532 nm) harmonic from a since it has a remarkably high photostability, high quantum yield, low cost, and close proximty to the absorption maximum (approximately 530 nm).
Split into simpler sentences: Rhodamine 6G is often used as a laser dye, and is pumped by the 2nd (532 nm) harmonic from a. The dye has a remarkably high photostability, high quantum yield, low cost, and its lasing range has close proximity to its absorption maximum (approximately 530 nm).