Title :
High efficiency small-size planar hyperbolical lenses
Author :
Hammes, P.C.A. ; Krijnen, G.J.M. ; Driessen, A. ; Smit, Meint K.
Author_Institution :
Fac. of Electr. Eng. & Appl. Phys., Twente Univ., Enschede, Netherlands
fDate :
7/5/1990 12:00:00 AM
Abstract :
Planar hyperbolical lenses with an average efficiency of 85% for coupling a 40 mu m wide beam into a 4 mu m wide waveguide are realised. The total length required for the beam compression is 600 mu m, with a lateral index contrast of 0.01. Good agreement is found between the BPM predicted and the measured lens efficiencies.
Keywords :
focusing; integrated optics; lenses; optical couplers; 4 micron; 40 micron; 600 micron; 85 percent; BPM prediction; beam compression; efficiency; lateral index contrast; optical waveguide couplers; planar lenses; small-size planar hyperbolical lenses; total length;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19900689
