Title :
High-efficiency acoustooptic guided-mode to leaky-mode conversion in proton-exchanged lithium niobate waveguides
Author :
Do, N.T. ; Su, Jianhui ; Yoo, Jerald ; Matteo, A.M. ; Tsai, C.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Irvine, CA, USA
Abstract :
The detailed results of an experimental study on high-efficiency collinear acoustooptic interaction in proton-exchanged lithium niobate (PE:LiNbO3) are presented. The guided-to-leaky mode-conversion for an optical beam at the wavelength of 0.6328 μm has been measured for different surface acoustic wave (SAW) carrier frequencies on x- and z-cut PE:LiNbO3. An optical guided TM mode to substrate TE mode conversion with efficiency as high as 77% has been observed with a SAW center frequency of 367 MHz and an input RF drive power density of 65 mW/mm on z-cut LiNbO3. In addition, an optical guided TE mode to substrate TE mode conversion with efficiency of 90% has been observed with a SAW center frequency of 103 MHz and an input RF drive power density of 94 mW/mm on x-cut LiNbO3.
Keywords :
acousto-optical signal processing; lithium compounds; substrates; surface acoustic wave waveguides; 0.6328 mum; 103 MHz; 367 MHz; 77 percent; 90 percent; SAW center frequency; acoustooptic guided-mode; center frequency of 103 MHz; collinear acoustooptic interaction; efficiency of 90%; input RF drive power density; leaky-mode conversion; optical guided TE mode; proton-exchanged lithium niobate waveguides; wavelength of 0.6328 μm; x-PE:LiNbO3; z-cut PE:LiNbO3; Acoustic measurements; Frequency conversion; Frequency measurement; Lithium niobate; Optical beams; Optical frequency conversion; Radio frequency; Surface acoustic waves; Tellurium; Wavelength measurement;
Conference_Titel :
Ultrasonics Symposium, 1999. Proceedings. 1999 IEEE
Conference_Location :
Caesars Tahoe, NV
Print_ISBN :
0-7803-5722-1
DOI :
10.1109/ULTSYM.1999.849474
