@ARTICLE{ iet:/content/journals/10.1049/el_19770489, author = {W.A. Gambling}, author = {H. Matsumura}, keywords = {characterisation factor;matching Gaussian beam;single mode fibre;spot size;HE11 mode;}, ISSN = {0013-5194}, language = {English}, abstract = {The spot size of the HE11 mode in a practical single-mode fibre mainly depends on the numerical aperture and not on the normalised frequency. An alternative definition of spot size in terms of a matching Gaussian beam is much simpler to use.}, title = {Simple characterisation factor for practical single-mode fibres}, journal = {Electronics Letters}, issue = {23}, volume = {13}, year = {1977}, month = {November}, pages = {691-693(2)}, publisher ={Institution of Engineering and Technology}, copyright = {© The Institution of Electrical Engineers}, url = {https://digital-library.theiet.org/;jsessionid=4piv87u0vhgca.x-iet-live-01content/journals/10.1049/el_19770489} }