WHAT DOES BBO CRYSTAL MEAN?

In some cases, the mismatch may be little. Such as, any time a β-BBO crystal is used to frequency double 1550 nm light-weight and supply 775 nm gentle, the group velocity mismatch is only a few femtoseconds for every millimeter.A2: Yes, prolonged publicity to humidity can degrade the optical efficiency of BBO crystals. Humidity may result in h2o