The present invention relates to an optical waveguide structure and in particular to {HEAD ~ an optical waveguide structure} having {TAIL ~ a splitting/coupling element} 
The present invention relates to an optical waveguide structure and in particular to { HEAD ~ an optical waveguide structure } having { TAIL ~ a splitting / coupling element }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL