1. H. FIZEAU, Ann. Chim. Phys. 66 (1986) 429.
2. M. BORN and E. WOLF, Principles of Optics, 6th edn. (Pergamon Press, Oxford, 1980).
3. A. N. RUBINOV and V. I. NIKOLAEV, Dokl. Akad. Nauk. BSSR 14 (1970) 20; V. I. TOMIN, B. A. BUSHUK and A. N. UBINOV, Opt. Spectrosc. 32 (1972) 32.
4. Spectra-Physics, Laser Instruments Division, 1250 W. Middlefield Road, Mountain View, Calif. 94042.
5. Y. H. MEYER and M. N. NENCHEV, Opt. Commun. 35 (1980) 115.