Potassium dideuterium phosphate

Pulsed lasers such as Nd YAG and excimer lasers are commonly used for the pump-probe experiment just mentioned. Some characteristics of these lasers are listed in Table 3-1. Although the fundamental of the Nd YAG laser is at 1,064 nm, this frequency can be multiplied by using nonlinear crystals, such as KDP (potassium dideuterium phosphate), to obtain the second (532 nm), third (355 nm) and fourth (266 nm) harmonics. Furthermore, a wide range of UV-visible pulsed radiation can be generated from th se harmonics by pumping a dye laser or using a Raman shifter (Sectior 2.2.5). 

Figure 5 Schematic diagram of an experimental set-up for the state-selective study of laser-induced desorption. KDP potassium dideuterium phosphate crystal, BBO p-barium borate crystal, MCP microchannel plate [11].

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