Thus, in an attempt to overcome limitations of known prior art devices, it is an object of {HEAD ~ this invention} to provide {TAIL ~ a new N×N optical switch} 
to provide
Thus , in an attempt to overcome limitations of known prior art devices , it is an object of { HEAD ~ this invention } to provide { TAIL ~ a new N×N optical switch }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL