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Proceedings Paper

Perturbational estimation of geometry tolerances for rectangular integrated optics devices
Author(s): Manfred Lohmeyer; Norbert Bahlmann; Oleksandr Zhuromskyy; Peter Hertel
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Paper Abstract

Shifting the location of a dielectric boundary in the cross section of an integrated optical waveguide with piecewise constant refractive index profile results in a permittivity perturbation in a layer along the discontinuity line. On the basis of these thin layer perturbations, we discuss perturbational expressions for the derivatives of the propagation constants with respect to geometry parameters, both for fully vectorial, hybrid and for semivectorial approximations to the basic mode fields. The expressions are numerically verified by comparison with rigorously calculated data for a common semiconductor rib waveguide. Applied to a more complex device, the perturbational approach allows to estimate its complete set of tolerances for the geometry parameters including the wavelength, on the basis of a single mode analysis. This is exemplified with a two rib waveguide coupler. By comparison with conventionally computed tolerances we give some assessment for the applicability of the effective perturbational approach.

Paper Details

Date Published: 26 March 1999
PDF: 9 pages
Proc. SPIE 3620, Integrated Optics Devices III, (26 March 1999); doi: 10.1117/12.343743
Show Author Affiliations
Manfred Lohmeyer, Univ. Osnabrueck (Netherlands)
Norbert Bahlmann, Univ. Osnabrueck (Germany)
Oleksandr Zhuromskyy, Univ. Osnabrueck (Germany)
Peter Hertel, Univ. Osnabrueck (Germany)


Published in SPIE Proceedings Vol. 3620:
Integrated Optics Devices III
Giancarlo C. Righini; S. Iraj Najafi, Editor(s)

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