The laser radiation will be supposed to be modulated at a frequency of no more than 150 Hz. One friend of mine said to me that maybe there would be a proceess of self-heating in my laser diode. It might cause the variations in brightness of a lightspot from the laser but its brightness is important for me. I would like to ask in this connection whether that is truth? If it is then what is the characterisic time of selfheating? When does the brightness become homogeneous? Will it change at a low frequency that equals 150 Hz?