1. Courtney, C. and Steen, W.M. ‘Measurement of the diameter of a laser beam’, Applied Physics (Germany), 17 (3), November 1978, pp. 303–307.
2. Meyerhofer, D. ‘Measurement of the beam profile of a 002 laser’, IEEE J. Quantum Electronics (USA), QE-4 (11), November 1968, pp. 969–970.
3. Foulk, L. R. ‘Laser beam prof 11e and detector surface scanner’, Report DBX-613–1841 (Rev), Pub I. Kansas City, Mo, BendlxCorp., November 1978, p. 32.
4. Grosjean, D.F., Olson, R.A. and Sarka, Jr, B. ‘High power 002 laser beam monitor’, Rev. Sci., Instrun (USA), 42 (6), June 1978, pp. 778–781.
5. Sepold, G., Juptner, W. and Rothe, R. ‘Remarks on deep penetration cutting with 002 lasers’, in Welding Research In the 1980’s, Proc. Int. Conf., Osaka, 27–29 October 1980, Pub I. Osaka University Welding Research Institute. Addition Paper A-29, p.3.