Cullen served as the Head of Department of Electronic and Electrical Engineering at University College London where he held the Pender Chair, from 1967 to 1980.[4] In 1988 he published his book Modern Radio Science and a biography of Harold Barlow.[5]
Cullen, A. L.; Parr, J.C. (1955). "A new perturbation method for measuring microwave fields in free space". Proceedings of the IEE - Part B: Radio and Electronic Engineering. 102 (6): 836–844. doi:10.1049/pi-4.1954.0028.
Cullen, A. L. (1958). "A travelling-wave parametric amplifier". Nature. 181 (4605): 332. doi:10.1038/181332a0.
Cullen, Alexander Lamb; Yu, P. K. (1979). "Complex source-point theory of the electromagnetic open resonator". Proceedings of the Royal Society A. 366 (1725): 155–171. doi:10.1098/rspa.1979.0045.
Cullen, Alexander Lamb; Yu, P. K. (1982). "Measurement of permittivity by means of an open resonator. I. Theoretical". Proceedings of the Royal Society A. 380 (1778): 49–71. doi:10.1098/rspa.1982.0029.