# The Export of Goods (Control) Order 1994, Paragraph 6C: Equipment, Assemblies and Components


Materials
6C002 Optical Sensors:
a. Elemental tellurium (Te) of purity levels equal to or more than 99.9995%;
b. Single crystals of cadmium telluride (CdTe), cadmium zinc telluride (CdZnTe) or mercury cadmium telluride (HgCdTe) of any purity level, including epitaxial wafers thereof;
c. Optical fibre preforms specially designed for the manufacture of high birefringence fibres specified in sub-head d.3. of entry 6A002.
6C004 Optics:
a. Zinc selenide (ZnSe) and zinc sulphide (ZnS) substrate blanks produced by the chemical vapour deposition process:
1. Larger than 100 cm3 in volume; or
2. Larger than 80 mm in diameter with a thickness equal to or more than 20 mm;
b. Boules of the following electro-optic materials:
1. Potassium titanyl arsenate (KTA);
2. Silver gallium selenide (AgGaSe2); or
3. Thallium arsenic selenide (Tl3AsSe3, also known as TAS);
c. Non-linear optical materials having:
1. Third order susceptibility (chi 3) equal to or less than 1 W/m2; and
2. A response time of less than 1 ms;
d. Substrate blanks of silicon carbide or beryllium beryllium (Be/Be) deposited materials exceeding 300 mm in diameter or major axis length;
e. Low optical absorption materials, as follows:
1. Bulk fluoride compounds containing ingredients with a purity of 99.999% or better;
Note: Sub-head e.1. of this entry specifies fluorides of zirconium or aluminium and variants.
2. Bulk fluoride glass made from compounds specified in sub-head e.1. of this entry;
f. Glass, including fused silica, phosphate glass, fluorophosphate glass, zirconium fluoride (ZrF4) and hafnium fluoride (HfF4) with:
1. A hydroxyl ion (OH—) concentration of less than 5 ppm;
2. Integrated metallic purity levels of less than 1 ppm; and
3. High homogeneity (index of refraction variance) less than 5 × 10−6;
g. Synthetically produced diamond material with an absorption of less than 10−5 cm−1 for wavelengths exceeding 200 nm but not exceeding 14,000 nm;
h. Optical fibre preforms made from bulk fluoride compounds containing ingredients with a purity of 99.999% or better, specially designed for the manufacture of fluoride fibres specified in head f. of entry 6A004.
6C005 Synthetic crystalline laser host material in unfinished form, as follows:
a. Titanium doped sapphire;
b. Alexandrite.

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Source: https://www.legislation.gov.uk/uksi/1994/1191/schedule/1/paragraph/6C (the official version)
Page: https://openlegislation.uk/export-of-goods-control-order-1994/schedule-1/paragraph-6C
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.