# Council Regulation (EC) No 428/2009 of 5 May 2009 setting up a Community regime for the control of exports, transfer, brokering and transit of dual-use items (Recast), Division [6C005]: "Laser" materials as follows:


a..Synthetic crystalline "laser" host material in unfinished form as follows:
1..Titanium doped sapphire;
2..Not used.
b..Rare-earth-metal doped double-clad fibres having any of the following:
1..Nominal "laser" wavelength of 975 nm to 1 150 nm and having all of the following:
a..Average core diameter equal to or greater than 25 μm; and
b..Core ‘Numerical Aperture’ (‘NA’) less than 0,065; or
Note:
6C005.b.1. does not control double-clad fibres having an inner glass cladding diameter exceeding 150 μm and not exceeding 300 μm.
2..Nominal "laser" wavelength exceeding 1 530 nm and having all of the following:
a..Average core diameter equal to or greater than 20 μm; and
b..Core ‘Numerical Aperture’ (‘NA’) less than 0,1.
Note: 6C005.b. includes fibres assembled with end caps.
Technical Note:
For the purposes of 6C005.b, the core 'Numerical Aperture' ('NA') is measured at the emission wavelengths of the fibre....

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Source: https://www.legislation.gov.uk/eur/2009/428/annex/I/division/8/division/3/division/6C005 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-428/annex-I/division-8/division-3/division-6C005
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.