90 degrees S-bends in Ti:LiNbO/sub 3/ waveguides with low losses

Author

Majd, Mohammad ; Schüppert, Bernd ; Petermann, Klaus

Author_Institution

Res. & Technol. Center of German Telekom, Berlin, Germany

Volume

5

Issue

7

fYear

1993

fDate

7/1/1993 12:00:00 AM

Firstpage

806

Lastpage

808

Abstract

S-shaped titanium waveguide bends with deflecting angles as large as 90 degrees have been fabricated on z-cut LiNbO/sub 3/ with bend radii of 5 mm. Nearly polarization independent bends have been achieved by simply broadening and thickening the Ti strips asymmetrically in the bent sections, yielding excess losses of approximately 1.5 dB for a single 90 degrees bend. Although Ti thickening and broadening yields the best results, Ti broadening in conjunction with MgO indiffusion is an alternative that is less critical with respect to mask alignment and device design.<>

Keywords

bending; integrated optics; lithium compounds; optical losses; optical waveguides; titanium; 1.5 dB; 5 mm; 90 degrees S-bends; LiNbO/sub 3/:Ti; MgO; MgO indiffusion; S-shaped; Ti strips; Ti:LiNbO/sub 3/ waveguides; bend radii; broadening; deflecting angles; device design; diffusion in solids; excess losses; low losses; mask alignment; polarization independent bends; thickening; waveguide bends; z-cut; Integrated optics; Optical device fabrication; Optical devices; Optical losses; Optical refraction; Optical ring resonators; Optical waveguides; Senior members; Titanium; Waveguide transitions;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.229813

Filename

229813