TRANSMISSION CHARACTERISTICS OF AN EXCITED-STATE FARADAY OPTICAL FILTER AT 532 NM

In this paper the calculations for a K Faraday filter at 532.33 nm tha t can be used to detect the practical and important frequency-doubled Nd:YAG laser are presented and discussed. Our model predicts a peak tr ansmission of 50% and an equivalent bandwidth of 4 GHz for the filter operating on the 4P(1/2) --> 8S(1/2) transition in potassium. The theo retical results show the transmission characteristics of the filter ar e relatively insensitive to the laser pump power and magnetic strength . The laser pump powers required range from 0.8 to 6 mW cm(-2).