1. diffraction efficiency measurement
By changing inputs to FM port of AOM driver, we measured diffraction efficiency with 1V DC injected to AM port of AOM driver by a function generator. We basically measured AOM outputs as reflections from Reference Cavity at DCPD with Reference Cavity unlooked. Then, based on the measurement of input just before AOM, 14.3mW, and output right after it, 6.0mW, with 7.5V-input to FM port of AOM driver, we converted the output signals at DCPD into Watt. The graph shows our result as the change of the ratio of output[mW] to input, 14.3mW, depending on input to FM port of AOM driver.
2. Cleaning
We tied up cables and tidied PSL room.
