Patent ID: 8004665

Claim:
A system to measure the energy level of a radiation pulse, the system comprising: a sample-and-hold module to measure the radiation pulse, the sample-and-hold module configured to generate a signal representative of an energy level of the radiation pulse, the sample-and-hold module comprising: a photo detector to generate electrical current in response to at least a portion of the radiation pulse incident on the photo detector, and an energy storage component to accumulate electrical charge from the electrical current generated by the photo detector during a period that the radiation pulse is active, the accumulated charge being representative of duration and strength of the radiation pulse, wherein the accumulated charge corresponds to a resultant voltage that is measured subsequent to completion of the period of the radiation pulse; and a processing module to determine an energy value of the radiation pulse based on the signal generated by the sample-and-hold module in response to a determination that a detected emission resulting in the generated signal corresponds to a laser pulse.