On the other hand, {TAIL ~ a small tuning coefficient} will yield {HEAD ~ small changes} in center wavelength with temperature 
On the other hand , { TAIL ~ a small tuning coefficient } will yield { HEAD ~ small changes } in center wavelength with temperature
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH