[1] [1] P. C. Conder et al.; Badeo & Electron. Engineer, 1970，39, No. 2，97～103.

[2] [2] A. Ferrario et al.; Rev. Scien. Instr, 1972,1216.

[3] [3] British Parent, No. (11) 1240031.

[5] [5] Laser Focus, 1970，6, No. 8, 17～25

[6] [6] G. Herziger et al.; Z. Phys., 1968，215，437～465.

[7] [7] W. B. Bridges et al.; Proc. of IEEE, 1971, 59, No. 5, 724～737.

[8] [8] Ο. P. Wang et al.; J. Appl. Fhys., 1972，43，No. 12，5068.

[9] [9] P. K. Cheo et al.; Appl. Phys. Lett., 1965, 6, 177.

[10] [10] J. Boscher et al.; Appl. Phys., 1974，5，203～210

[11] [11] Τ. Fujimoto; Jap. J. Pppl. Phys., 1972, 11,1501.

[12] [12] A. S. Halsted et al., Gaseous ion laser research, Hughes Res. Lab., Malibu, Calif., Tech., Eep. AFAL-TRr-68-227, July 1968; DDO accession no AD-841-834.

[13] [13] I. Gorog et al.; RCA Rev., 1967, 27, No. 1，38.

[14] [14] Eoy Paananen, Appl. Phys. Lett, 1966，9, No. 1, 34～35.