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Tellurite photonic crystal fiber

V. V. Ravi Kanth Kumar, A. K. George, J. C. Knight, and P. St. J. Russell

Open Access Open Access

Abstract

We report the fabrication of a Tellurite photonic crystal fiber, and demonstrate its waveguiding properties. The measured minimum loss is 2.3 dB/m at a wavelength of 1055 nm. The fiber supports several modes, but in practice just the fundamental mode can be used. We have observed strong stimulated Raman scattering in a fiber with an effective area Aeff=21.2µm2, using sub-ns, ~1 µJ pump pulses at 1064 nm.

©2003 Optical Society of America

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Figures (3)
Fig. 1.
Fig. 1. (a) Photograph showing the cross-section of the die used for extrusion, (b) Electron micrograph of an extruded tellurite preform, of outer diameter 1mm, (c) Electron micrograph of tellurite PCF and (d) Transmission view of a tellurite PCF observed under microscope.

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Fig. 2.
Fig. 2. Measured spectral attenuation in a Tellurite Photonic Crystal Fiber. The size of the core is 7 µm. The minimum measured loss in this fiber is 2.3 dB/m. The cutback measurement was done on a fibre length of 2.5 m.

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Fig. 3.
Fig. 3. Stimulated RamaStimulated Raman spectra from a Tellurite PCF of 1.02m length, using an pump laser wavelength of 1064 nm. All the incident pulse energy values given in the right are in µJ. The coupling efficiency is about 30%.

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