L&e 



1.1 1.2 1.3 1.4 



1.5 



1.6 1.7 1.8 1.9 



X,A. 



Fig. 1 Difference-frequency wave length 



vs. fundamental-frequency wave length 



spending frequencies are respectively 



or, (= VZirg/X, ) = Virg/b , V irg/Sb , and V irg/lOb 



ff is obtained from V = X-^/X.. = cr.^/cr^ as 

 2 2' I I ' 2 



0-2 = V2Trg/(X,X) . 

 Thus we have 



for X. = 2b, 0-2= V7rg/(b\) 



for X., = 10b, 0-2 = V ug/(5bX) 



930 



