Application of in situ laser energy metrology

As the sensitivity of laser energy meter is dependent on the environmental temperature, the sensitivity deviation could reach 16% in the temperature range of -50℃～70℃. In order to make accurate measurement under the different temperature conditions of open field, a novel laser energy meter for field application was developed. Base on the design of the current laser energy meter, laser materials with better transparence, thicker absorbing layer and thermal sensitivity surface unsusceptible to damage were chosen, the temperature sensor and the digital processing circuit in the energy meter were redesigned to meet the requirements of laser energy metrology in field.