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