In a nonlinear optical device, {HEAD ~ a present invention nonlinear optical medium component} is transparent to both the incident and {TAIL ~ exit} light frequencies 
is transparent to
In a nonlinear optical device , { HEAD ~ a present invention nonlinear optical medium component } is transparent to both the incident and { TAIL ~ exit } light frequencies
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH