2/15    physics/EE question:  suppose I have a laser emitting light at
        100 um.  Is there a standard process to convert that light source
        to have it emit at say 200 um?  What is that process and/or the name
        of the component that does that?  Is it an off-the-shelf component
        or is it something that has to be custom-made for the desired
        wavelength conversion?  Thanks.
        \_ sum/difference frequency mixing
        \_ Is this your homework assignment?  If so, the motd is not a good
           place for answers.
        \_ The short answer is Yes. read the documentation for your laser
           and call the manufacturer about available components.