How to find the best parameters for the PID-controller?
To find the right parameters and to optimize the PID-controller to have the most accurate and fastest feedback control of your laser can be a real challenge sometimes. We hereby describe a quick procedure finding the parameters P, I, D and the time constant Ta for the I- and D-calculation. This procedure is based on our ยป PID-Simulator which estimates these parameters according to your setup- and laser-conditions. First, you need to setup your Wavelength Meter: Set an appropriate exposure time (the smaller the better). (e.g. 5 ms) Start the measurement and determine the repetition rate (simply type “RepetitionRate” in the “Start | Run…” dialog box). (e.g. 40 Hz) Now, you need to know your laser: Find a working range where the laser is operating mode hop free in a certain range. This working range later must cover the wavelength range you want to work/regulate at. Apply 0 V on the LC-output of the wlm using the “Calibration”-tab in the laser control settings window and press “Send”. W
