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Proceedings Paper

Tunable high-resolution fiber optic WDMs using the high-index approach
Author(s): Walter Johnstone; David G. Moodie; Graham Thursby; Kevin J. McCallion; Gordon Fawcett
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Paper Abstract

High resolution (1 nm), low loss (< 0.2 dB) optical fiber WDMs based on evanescent field coupling between a single mode fiber, side polished close to the core, and a planar high index overlay have been reported previously. By using electro-optic materials in the role of either the overlay or superstrate (above the overlay) the wavelength characteristics may be dynamically tuned under operational conditions. Here we report the results of a theoretical and experimental investigation of the performance limits of these devices. Specific aspects dealt with include the practical limits on the optimization of resolution and tunability (active and passive). Material investigations for use in the overlay structure include lithium niobate, liquid crystals, zinc selenide (vacuum deposited), and silicon. It is concluded that sub nanometer resolution and tuning ranges of several tons of nanometers are realistic for these systems.

Paper Details

Date Published: 19 February 1993
PDF: 7 pages
Proc. SPIE 1792, Components for Fiber Optic Applications VII, (19 February 1993); doi: 10.1117/12.141187
Show Author Affiliations
Walter Johnstone, Univ. of Strathclyde (United Kingdom)
David G. Moodie, Univ. of Strathclyde (United Kingdom)
Graham Thursby, Univ. of Strathclyde (United Kingdom)
Kevin J. McCallion, Univ. of Strathclyde (United Kingdom)
Gordon Fawcett, Univ. of Strathclyde (United Kingdom)

Published in SPIE Proceedings Vol. 1792:
Components for Fiber Optic Applications VII
Paul M. Kopera, Editor(s)

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