Efficient generation of picosecond coherent tunable radiation between 190 and 212 nm by sum-frequency mixing from Raman and optical parametric radiations

It is pointed out that practical techniques for generating coherent tunable UV radiation around 200 nm have not yet become well established in cases in which nonlinear crystalline media are used. This is particularly true for the picosecond time domain. Light sources with the considered characteristics are needed for studies in the area of photochemistry and solid-state physics. Takagi et al. (1983) have overcome certain problems regarding the design of such light sources by adopting an efficient simple optical parametric conversion procedure for the primary tunable radiation source. The selected approach is based on a utilization of KDP and sum-frequency mixing. The present investigation is concerned with an employment of KDP and sum-frequency mixing for an emission of tunable radiation in the range from 190 to 212 nm.