Use of MgO Indiffusion To Improve The Optical Performance Of Ti Indiffused LiNbO3 Waveguide Modulators

D. R. Gibson; C. Sharp

doi:10.1117/12.963351

5 January 1990 Use of MgO Indiffusion To Improve The Optical Performance Of Ti Indiffused LiNbO3 Waveguide Modulators

D. R. Gibson, C. Sharp

Proceedings Volume 1177, Integrated Optics and Optoelectronics; (1990) https://doi.org/10.1117/12.963351
Event: OE/FIBERS '89, 1989, Boston, United States

Abstract

The use of subsequent MgO indiffusion to bury Ti indiffused waveguides in LiNbO₃ is shown to reduce the surface scatter contribution to waveguide propagation loss. Assessment of waveguide propagation loss foil- non-buried and buried waveguides at wavelengths 0.851μn, 1.06μm, 1.32tim and 1.52μm show a λ dependence for non-buried waveguides, indicating a surface scatter mechanism. Buried waveguide propagation loss exhibits no such dependence on wavelength, with a propagation loss of i0.25dB/cm over the wavelength range. Reduced excess loss of buried λ- junction waveguide structures, in Mach Zehnder intensity modulators, is demonstrated. This improvement is ascribed to increased light confinement and reduced scatter in the vicinity of the bifurcation region. Active performance of phase and intensity modulators, with non-buried and buried waveguides, indicate no significant change in required drive voltage. This is due to a choice of MgO conditions which lead to sufficient waveguide burial to reduce propagation loss, but to little change in Ti diffusion depth and hence optical/electrical field overlap characteristic.

Citation Download Citation

D. R. Gibson and C. Sharp "Use of MgO Indiffusion To Improve The Optical Performance Of Ti Indiffused LiNbO3 Waveguide Modulators", Proc. SPIE 1177, Integrated Optics and Optoelectronics, (5 January 1990); https://doi.org/10.1117/12.963351

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available