Tunable high-resolution fiber optic WDMs using the high-index approach

Walter Johnstone; David G. Moodie; Graham Thursby; Kevin J. McCallion; Gordon Fawcett

doi:10.1117/12.141187

19 February 1993 Tunable high-resolution fiber optic WDMs using the high-index approach

Walter Johnstone, David G. Moodie, Graham Thursby, Kevin J. McCallion, Gordon Fawcett

Proceedings Volume 1792, Components for Fiber Optic Applications VII; (1993) https://doi.org/10.1117/12.141187
Event: Fibers '92, 1992, Boston, MA, United States

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.

Citation Download Citation

Walter Johnstone, David G. Moodie, Graham Thursby, Kevin J. McCallion, and Gordon Fawcett "Tunable high-resolution fiber optic WDMs using the high-index approach", Proc. SPIE 1792, Components for Fiber Optic Applications VII, (19 February 1993); https://doi.org/10.1117/12.141187

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