1. S. D. Jackson, and T. A. King, Opt. Lett. 23, 1462 (1998).
2. G. L. Wood and M. A. Dubinskii, Proc. SPIE 6552, 655202 (2007).
3. N. P. Barnes, W. A. Clarkson, D. C. Hanna, V. Matera, and B. M. Walsh, in Lasers and Electro-Optics 2001, Proceedings of the CLEO’01 (2001), pp. 530–531.
4. J. F. Pinto, L. Esterowitz, and G. H. Rosenblatt, Opt. Lett. 17, 731 (1992).
5. K. L. Schepler, B. D. Smith, F. Heine, and P. A. Budni, in Advanced Solid State Lasers, Ed. by T. Y. Fan, and B. Chai, Vol. 20 of OSA Proceedings Series (Opt. Soc. Amer., 1994), paper UP9.