One can see from the plot after 40 minutes of warming up the laser reached the set point, and its power remained stable within 1.3% for the next 16 hours. Standard deviation was 0.13%. What is more, during the 14 hours in the middle of the test period the laser power only fluctuated from 471 mw to 473 mw. This yielded a relative fluctuation of 0.42% and standard deviation of 0.10%. Actually, we suspect the laser surpassed the stability of the power meter that was used in this measurement.