PHASE-MATCHED 2ND-HARMONIC GENERATION BY PERIODIC POLING OF FUSED-SILICA

90-degrees phase matching in periodically poled fused silica is achiev ed over approximately 2 mm at a wavelength of 1064 nm. Electrical poli ng was done at 5 kV for 120 min using photolithographed periodic elect rodes on fused silica glass at 250-degrees-C. A nonlinearity equivalen t to d11/200 of quartz is estimated from measurements. Several phase-m atched interactions are reported and the implications for device appli cations discussed.