Title :
Design and fabrication of wide-angle TE-TM mode splitter in lithium niobate
Author :
Liao, Yu-Pin ; Lu, Ruei-Chang
Author_Institution :
Dept. of Electron. Eng., Chien Hsin Inst. of Technol., Taoyuan, Taiwan
Abstract :
A novel wide-angle TE-TM mode splitter in a Z-cut lithium niobate is presented. A straight random polarization nickel-indiffused waveguide and a proton-exchanged waveguide bend with substrate prism on the bend corner were combined to form an asymmetric wide-angle Y-branch. The waveguide bend with substrate prism bends the TM wave to the proton-exchanged waveguide with large angle. Hence, the TE wave is left in the straight NI waveguide. The experimental results show that the splitting ratios are 26 dB for the TE mode and 28 dB for the TM mode even at a splitting angle of 7.
Keywords :
ion exchange; lithium compounds; optical beam splitters; optical design techniques; optical fabrication; optical planar waveguides; optical prisms; waveguide discontinuities; LiNbO/sub 3/; Z-cut lithium niobate; asymmetric wide-angle Y-branch; bend corner; optical design; optical fabrication; proton-exchanged waveguide; proton-exchanged waveguide bend; splitting angle; splitting ratios; straight random polarization nickel-indiffused waveguide; substrate prism; substrate prism bends; waveguide bend; wide-angle TE-TM mode splitter; Directional couplers; Extinction ratio; Fabrication; Lithium niobate; Nickel; Optical devices; Optical fiber communication; Optical fiber polarization; Optical waveguides; Tellurium;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/2944.826876
