Spectroscopic analysis of insulating crystal fibers

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Abstract
A new technique for investigating the optical properties of solid-state laser materials using single-crystal fibers grown by a laser-heated pedestal-growth technique is described. Single-crystal fiber samples can be prepared more rapidly and less expensively than crystals grown by more conventional methods, however, they are smaller and less uniform making spectroscopic measurements difficult. A simple procedure for extracting the optical absorption and emission spectra of insulating crystal fibers is demonstrated with a titanium-doped sapphire fiber sample; results are comparable to those from Czochralski-grown material.

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