Title :
Collinear acoustical TM-TE mode conversion in proton exchanged Ti:LiNbO3 waveguide structures
Author :
Hinkov, V.P. ; Opitz, R. ; Sohler, W.
Author_Institution :
Angewandte Phys., Univ.-GH-Paderborn, West Germany
fDate :
6/1/1988 12:00:00 AM
Abstract :
Collinear acoustooptic TM-TE mode conversion is experimentally investigated in proton exchanged Ti:LiNbO3 optical waveguides. Their birefringence is adjusted by an appropriate annealing to allow phase matching at surface acoustic wave frequencies of about 90 MHz and 180 MHz, respectively. A planar mode converter with an efficiency of up to 90 percent is presented (87 MHz, 175 MHz). Furthermore, a combined acoustical/optical strip waveguide structure is developed as mode converter, leading to strongly reduced power requirements; only 0.3-mW acoustic power is sufficient to achieve a conversion efficiency of 50 percent
Keywords :
acousto-optical devices; lithium compounds; optical frequency conversion; optical modulation; optical waveguides; titanium; 175 MHz; 180 MHz; 87 MHz; 90 MHz; TM-TE mode conversion; birefringence; collinear acoustooptical mode conversion; conversion efficiency; optical waveguides; phase matching; planar mode converter; proton exchanged waveguide; surface acoustic wave; Acoustic waveguides; Acoustic waves; Annealing; Birefringence; Optical frequency conversion; Optical surface waves; Optical waveguides; Protons; Strips; Surface acoustic waves;
Journal_Title :
Lightwave Technology, Journal of
