Walker, B; Jones, T; Wells, D S (2001) Group index variations in single-mode optical fibres. NPL Report. COAM 1

Walker, B; Buncle, P T; Wells, D S (2000) Dispersion mapping of optical fibres. NPL Report. COEM 53

Billington, R; Bongrand, I*; Hallam, A*; Humphreys, D A; Parker, A; Walker, B; Wells, D S (2000) Effective area of single-mode optical fibres - a comparison of four measurement techniques. In: European Conference on Optical Communication (ECOC) 2000, September 2000, Munich, Germany.

Humphreys, D A; Billington, R S; Parker, A; Walker, B; Wells, D S; Hallam, A G*; Bongrand, I* (2000) A comparison of three techniques for effective area measurement of single-mode optical fibres. NIST Special Publication, 953. pp. 61-64.