[1] Univ Birmingham, Midlands Ultracold Atom Res Ctr, Phys & Astron, Birmingham B15 2TT, W Midlands, England
[2] Univ Glasgow, Sch Engn, Rankine Bldg,Oakfield Ave, Glasgow G12 8LT, Lanark, Scotland
[3] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England
[4] Univ Nottingham, George Green Inst Electromagnet Res, Univ Pk, Nottingham, England
[5] Univ Nottingham, Addit Mfg & Printing Res Grp 3D, Fac Engn, Nottingham NG7 2RD, England
[6] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England
[7] Univ Southampton, Sch Math Sci, Southampton SO17 1BJ, Hants, England
[8] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England
[9] Univ Strathclyde, Phys, Glasgow G4 0NG, Lanark, Scotland
[10] Univ Strathclyde, Dept Phys, Inst Photon, Glasgow G1 1RD, Lanark, Scotland
[11] Univ Sussex, Dept Phys & Astron, Falmer Brighton BN1 9QJ, England
[12] Natl Phys Lab, Teddington TW11 0LW, Middx, England
[13] M Squared Lasers Ltd, 1 Kelvin Campus,West Scotland Sci Pk,Maryhill Rd, Glasgow G20 0SP, Lanark, Scotland
[14] E2v, 106 Waterhouse Lane, Chelmsford CM1 2QU, Essex, England