Linear Optical Effects in Liquids?
(From: Bob.) You can get non linear processes to happen in various liquids. I have seen water operate as a non-linear medium before. but the problem is that the efficiency of using such materials is so ridiculously low that you need e very powerful laser to see any results. You can forget about doubling any 800 or 900 nm laser diode. If on the other hand you would like to double a high power Ti:Sapphire laser, yup you can do it. Only problem is since water and other liquids do not have a rigid structure, you can’t exactly phase match whatever non-linear process you want. So what ends up happening is a lot of non-linear processes at the same time with varying (low) efficiencies and you get something along the lines of continuum generation – white light. Non-Linear Crystals Environmental Considerations Fortunately, KTP is a stable material. However, many others require special handling, storage, and mounting to avoid degradation due to moisture. (From: Bob.) Many non-linear crystals othe
