6A994 Category 6A

Optics, not controlled by 6A004, as follows (see List of Items Controlled).

Category 6: Sensors and Lasers

Reasons for control

• AT: Anti-terrorism

Country chart

List-based license exceptions

Items

1. Items: a. Optical filters:
2. a.1. For wavelengths longer than 250 nm, comprised of multi-layer optical coatings and having either of the following:
3. a.1.a. Bandwidths equal to or less than 1 nm Full Width Half Intensity (FWHI) and peak transmission of 90% or more; or
4. a.1.b. Bandwidths equal to or less than 0.1 nm FWHI and peak transmission of 50% or more;
5. a.2. For wavelengths longer than 250 nm, and having all of the following:
6. a.2.a. Tunable over a spectral range of 500 nm or more;
7. a.2.b. Instantaneous optical bandpass of 1.25 nm or less;
8. a.2.c. Wavelength resettable within 0.1 ms to an accuracy of 1 nm or better within the tunable spectral range; and
9. a.2.d. A single peak transmission of 91% or more;
10. a.3. Optical opacity switches (filters) with a field of view of 30° or wider and a response time equal to or less than 1 ns;
11. b. “Fluoride fiber” cable, or optical fibers therefor, having an attenuation of less than 4 dB/km in the wavelength range exceeding 1,000 nm but not exceeding 3,000 nm.

Related controls

N/A

Notes

Note: 6A994 does not control optical filters with fixed air gaps or Lyot-type filters.

Source: eCFR, version 2026-08-01, retrieved 2026-08-20T04:04:59+00:00.