We report the operation of an in-line Nd:YAG resonator using self-pumped phase conjugation in Cr<sup>4+</sup>: YAG at λ=1.064µm in the nanosecond regime. The output beam has a high-quality diffraction-limited TEM<sub>00</sub> mode and a pulse shape of ~15ns , showing the self- <i>Q</i> -switching ability of the resonator. A maximum extraction of 18mJ and a maximum reflectivity of 2.0 are measured. A transient model provides insight into the energy characteristics and the dynamics of such an in-line resonator.
© 1998 Optical Society of America
P. Sillard, C. Grange, A. Brignon, and J.-P. Huignard, "In-line Nd:YAG resonator using self-pumped phase conjugation in Cr4+:YAG," Opt. Lett. 23, 37-39 (1998)