1. Barnoski, M. K., Fundamentals of Optical Fibre Communications ( Academic Press, London, 1976 ).
2. Boyle, W. S., ‘Light-Wave Communications’, Scient. Am., 237 (1977) 2.
3. Midwinter, J. E., Optical Fibres for Transmission, ( Wiley, New York, 1979 ).
4. Panish, M. B., ‘Heterostructure Injection Lasers’, Proc. IEEE, 64 (1976) 10.
5. Panish, M. B., and Hayashi, I., ‘A New Class of Diode Lasers’, Scient. Am. 225 (1971) 1.