Title :
Index profile of proton-exchanged waveguides in LiNbO3 using pyrophosphoric acid
Author :
Pun, E.Y.B. ; Kong, T.C. ; Chung, P.S. ; Chan, H.P.
Author_Institution :
Chinese Univ. of Hong Kong, Hong Kong
Abstract :
A systematic study was carried out on proton-exchanged LiNbO3 optical waveguides using pyrophosphoric acid. A maximum surface index increase of 0.145 was measured at 0.633 mu m for z-cut substrates. The index profile could be accurately modelled by a polynomial expression of simply by a ´truncated´ step-index profile.
Keywords :
ion exchange; lithium compounds; optical waveguides; refractive index; 633 nm; H 4P 2O 7; LiNbO 3 optical waveguides; index profile; polynomial expression; proton-exchanged waveguides; truncated step index profile; z-cut substrates;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19900054
