Title :
Coupling ratio control of polymeric waveguide couplers by bending
Author :
Yoshimura, Ryoko ; Nakagome, Hideki ; Imamura, Shun´ichi ; Izawa, Tamon
Author_Institution :
NTT Corp., Ibaraki, Japan
Abstract :
Directional couplers are successfully fabricated on acrylic substrates using polymers synthesised from deuterated methacrylate and deuterated fluoromethacrylate monomers. The excess loss of a 50 mm long coupler is about 0.7 dB including waveguide and fibre coupling losses. A novel method is proposed for tuning the coupling ratio. By bending the coupler, high precision control of within 1% is attained without optical polarisation dependence.
Keywords :
bending; directional couplers; optical couplers; optical losses; optical workshop techniques; polymers; acrylic substrates; bending; coupling ratio tuning; deuterated fluoromethacrylate; deuterated methacrylate; directional couplers; fibre coupling losses; high precision control; polymeric waveguide couplers; waveguide losses;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921370
