A method in accordance 8, wherein said {HEAD ~ center wavelength} varies {TAIL ~ less than 0.05 nm} over a temperature range of 20° to 90° C 
A method in accordance 8 , wherein said { HEAD ~ center wavelength } varies { TAIL ~ less than 0.05 nm } over a temperature range of 20 ° to 90 ° C
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH