An objective Book of comparative Study of the performance of laser dyes in different host material. This book dealt about preparation Glycidyl methacrylate (GMA) polymer as a new host material, besides to sol-gel glass and hybrid material, which are used as hosts for laser dyes. Optical studies of some laser dyes in this different hosts material. Design and construction of solid dye lasers pumping by pulsed flashlamp. This book provides advanced ideas and fundamental understanding about solid dye lasers.