Title :
Beam coupling and spatial mode conversion in photorefractive planar waveguide
Author :
Chiou, Arthur ; Yeh, Pochi ; Gu, Claire ; Neurgaonkar, Ratnakar
Author_Institution :
Rockwell Inst. Sci. Center, Thousand Oaks, CA, USA
Abstract :
Beam coupling in photorefractive bulk crystals has been studied intensively and demonstrated for many application concepts, including coherent image amplification, image processing and parallel logic operations. In contrast, photorefractive beam coupling and spatial mode conversion in guided wave structures have attracted much less attention. The latter has potential application in facilitating the coupling of a free propagating laser beam to low-order guided modes in an appropriate waveguide structure. In this paper, we discuss this novel concept and present experimental demonstrations of beam coupling and spatial mode conversion in a thin plate of strontium barium niobate (SBN:75) crystal
Keywords :
barium compounds; optical couplers; optical planar waveguides; photorefractive materials; strontium compounds; Sr1-xBaxNb2O6; SrBaNb2O6; beam coupling; coherent image amplification; free propagating laser beam; guided wave structures; image processing; low-order guided modes; parallel logic operations; photorefractive planar waveguide; spatial mode conversion; thin plate; waveguide structure; Crystals; Image converters; Image processing; Laser beams; Laser modes; Logic; Optical coupling; Optical propagation; Photorefractive effect; Photorefractive materials;
Conference_Titel :
Lasers and Electro-Optics Society Annual Meeting, 1993. LEOS '93 Conference Proceedings. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
0-7803-1263-5
DOI :
10.1109/LEOS.1993.379007
