This practice covers the handling, testing, and procedure for using a radiochromic optical waveguide dosimetry system to measure absorbed dose in materials irradiated by photons in terms of absorbed dose in water. This practice applies to radiochromic optical waveguide dosimeters that can be used within part or all of the specified ranges as follows: The absorbed dose range is from 1 to 10000 Gy for photons. The absorbed dose rate is from 0.001 to 1000 Gy/s. The radiation energy range for photons is from 0.1 to 10 MeV. The irradiation temperature range is from -78 to +60?C. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.