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Proceedings Paper

Fabrication and characterization of singlemode channel waveguides and modulators in KTiOPO4 for the short visible wavelength region
Author(s): Matthias Rottschalk; Jens-Peter Ruske; Kay Hornig; Andreas S. Rasch
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Paper Abstract

Singlemode strip waveguides at the wavelengths (lambda) equals0.514 micrometers and (lambda) equals0.488 micrometers have been fabricated in potassium titanyl phosphate (KTiOPO4 or KTP) by rubidium- potassium ion exchange in molten mixtures of RbNO3/KNO3/Ba(NO3)2. The technological parameters had been chosen by means of theoretical calculations concerning the singlemode region of the effective strip waveguide index N00 at the given wavelength. Measured near field distributions and insertion losses of the strip waveguides led to a typical attenuation of about 2 dB/cm for TM polarization at (lambda) equals0.514 micrometers . The light-induced refractive index changes (photorefractive effect) have been measured as a function of time, wavelength, and optical mode intensity. Electro-optic phase modulators have been successfully investigated concerning dynamic Vpi measurements, the electric-optical field overlap and dc-drift phenomena by using a special interferometric setup based on a two-beam interference of two neighboring strip waveguides.

Paper Details

Date Published: 28 July 1994
PDF: 12 pages
Proc. SPIE 2213, Nanofabrication Technologies and Device Integration, (28 July 1994); doi: 10.1117/12.180957
Show Author Affiliations
Matthias Rottschalk, Friedrich-Schiller-Univ. Jena (Germany)
Jens-Peter Ruske, Friedrich-Schiller-Univ. Jena (Germany)
Kay Hornig, Friedrich-Schiller-Univ. Jena (Germany)
Andreas S. Rasch, Friedrich-Schiller-Univ. Jena (Germany)

Published in SPIE Proceedings Vol. 2213:
Nanofabrication Technologies and Device Integration
Wolfgang Karthe, Editor(s)

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