Electro-optic properties of proton-exchanged (PE) waveguide layers in LiTaO3 and LiNbO3 are studied and related to their optical characteristics. The proton-exchange process induces a degradation of the electro-optic activity in both types of waveguides, PE LiNbO3 and PE LiTaO3. The measured electrooptic effect is close to the detection sensitivity even when the exchange regime is performed at low temperatures for short periods of time, The PE samples have been annealed (APE waveguides) and the changes of their tau(33) electro-optic coefficient has been followed at successively higher temperatures and periods of time, Subjected to annealing at temperatures between 265-420 degrees C, the LiTaO3 layers show a partially recovered tau(33) coefficient, the recovering being different for quick and slow cooling of the samples, In thin APE LiNbO3 waveguiding layers a restoration of tau(33) UP to 75% of the bulk value is observed due to the annealing at temperatures between 200-340 degrees C.
|Titolo:||Electro-optic effect in proton exchanged LiNbO3 and LiTaO3 waveguides|
|Data di pubblicazione:||1996|
|Digital Object Identifier (DOI):||10.1109/50.485600|
|Appare nelle tipologie:||1.1 Articolo in rivista|