Objective: Frequency doubling inside the resonator of a Nd:YAG laser
Materials often change their optical properties in strong electromagnetic fields. For instance, it is possible for the frequency of high-intensity laser light passing through such materials to be doubled. In this experiment, a KTP (potassium titanyl phosphate) crystal is used to generate green light with a wavelength of 532 nm from the 1064-nm infra-red radiation output by an Nd-YAG laser by means of frequency doubling. The crystal is suitable in a number of respects, such as its strongly non-linear optical characteristics, and its low absorption of radiation at the original frequency and double the frequency.
![Experiment: Nd:YAG -Laser, Frequency doubling, 8000698 [UE4070330], Laser](/imagelibrary/UE4070330/UE4070330_01_Experiment-Nd-YAG-Laser-Frequency-doubling.jpg)
![Experiment: Nd:YAG -Laser, Frequency doubling, 8000698 [UE4070330], Laser](/thumblibrary/UE4070330/UE4070330_01_1200_1200_Experiment-Nd-YAG-Laser-Frequency-doubling.jpg)
