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Solid microstructured optical fiber

Xian Feng, Tanya M. Monro, Periklis Petropoulos, Vittoria Finazzi, and Dan Hewak

Open Access Open Access

Abstract

An all-solid microstructured fiber based on two thermally-matched silicate glasses with a high index contrast has been fabricated for the first time. The microstructured cladding was shown to be essentially unchanged during fiber drawing. Fiber attenuation was measured as 5dB/m at 1.55µm by the cutback method. High nonlinearity 230 W-1km-1 has been predicted and experimentally demonstrated in this fiber at 1.55µm. In addition, modeling predicts that near-zero dispersion can be achieved between 1.5–1.6µm in this class of high nonlinear fiber.

©2003 Optical Society of America

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Figures (5)
Fig. 1.
Fig. 1. Comparison of SEM photos of 220 µm diameter SOHO fiber by adjusting accelerating voltage (EHT) (a) whole view (scale bar: 100µm), EHT = 2.72 kV, (b) zoomed center view (scale bar: 20µm), EHT = 2.72 kV; (c) whole view (scale bar: 100µm), EHT = 22.00 kV, (d) zoomed center view (scale bar: 2µm), EHT = 22.00 kV.

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Fig. 2.
Fig. 2. SEM photos of microstructured cladding in (a) the 1mm cane inserted into jacket tube before fiber drawing, (b) 440µm OD fiber with Λ=4µm and (c) 220µm OD fiber with of Λ=2µm. (EHT = 22.00 kV)

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Fig. 3.
Fig. 3. (a) Calculated confinement losses of B1/H1 based SOHO fiber as a function of the number of hexagonal packed rings and their diameter to spacing ratio d/Λ with Λ=4µm at 1.55µm; (b) measured propagation attenuation of (1) unclad 250µm B1 fiber, (2) 440µm B1/H1 SOHO fiber, (3) 220 µm B1/H1 SOHO fiber. Measurement errors are plotted.

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Fig. 4.
Fig. 4. Effective nonlinearity of SOHO fiber (left: calculated for a range of simple step-index fiber designs, right: measured relationship between nonlinear phase shift and the input laser power at 1.55µm)

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Fig. 5.
Fig. 5. Prediction of GVD of a range of B1/H1 SOHO fibers made using a full-vector implementation of the orthogonal function method [7]. The material dispersions of both B1 and H1 materials have been included ab initio in these predictions.

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