Highly efficient phase conjugation in a laser-injection-seeded solid dye laser

Summary form only given. Efficient phase conjugation in saturable gain medium solid dye has received much attention in application fields such as optical image processing, spectroscopy, and medical optics. For practical phase conjugators, an energy extraction efficiency, defined as a ratio of the extracted phase-conjugate energy to the total beam energy injected externally into the phase conjugator, is a more important parameter than the phase-conjugate reflectivity. We present an efficient phase conjugator by degenerated four-wave mixing in a laser injection-seeded solid dye laser. Energy extraction efficiency as much as 130 was obtained. The solid laser dye was composed of matrix polymethyl methacrylate with 0.1-0.2 wt.% doping of Rhodamine 6G dye.