We demonstrate a self-pumped phase-conjugate diode-pumped Nd:YAG loop resonator. In the injected configuration a maximum phase-conjugate reflectivity of 32 is obtained. The output beam has a pulse shape of ~30 ns , which shows the self- <i>Q</i> -switching ability of the resonator. By use of a low-refractive-output coupler, a self-starting version was produced. The resonator operated in a stable diffraction-limited TEM<sub>00</sub> mode, even with severe intracavity phase aberrations. A maximum energy of 5.5 mJ (2.4% of the energy of the high-brightness stacks that was incident upon the Nd:YAG crystals) in a 20-ns single-longitudinal-mode pulse was measured.
© 1998 Optical Society of America
P. Sillard, A. Brignon, J.-P. Huignard, and J.-P. Pocholle, "Self-pumped phase-conjugate diode-pumped Nd:YAG loop resonator," Opt. Lett. 23, 1093-1095 (1998)