The purpose of this standard is to clarify definitions so that ambiguity in specifications can be eliminated to facilitate broad usage of Fiber Optic Bragg grating sensors in a broad range of applications including smart civil structures, avionics, security, defense, environmental monitoring and medical diagnostics. The document provides definitions and explanations of terms relating to the use of fiber Bragg grating interrogators. It also offers a list of the key performance parameters needed to describe fully a Bragg grating-based sensor system and to allow the end user readily to compare systems from different suppliers for specific applications.