I got the feedback working on the TOPTICA Photonics 397nm tunable diode #laser.   As you can see, the measured wavelength is constant but the laser controller parameters (diode current and piezo voltage) are changing.     #physics #accelerators<p><video src='posts/202611/post-20261109-205304-a.mp4' loading='lazy' preload='metadata' controls></video></p>