Thermo-optical switch based on optical fiber coupler coated with sol-gel film
Journal Title: Science Paper Online - Year 2010, Vol 5, Issue 1
Abstract
A simple thermo-optical switch was demonstrated. The fiber coupler was coated with organic-inorganic sol-gel material which had high thermo-optical coefficient. With the variation of temperature, the refractive index profile of the coupler was changed. As the film refractive index was higher than that of the fiber coupler’s silica material, the optical power would no longer propagate through the coupler. On the contrary, the film index was tuned to a lower value; the optical power would be restricted within the coupler. Thus, a function of optical switch controlled by temperature was achieved. With a low cost, easy fabrication and good stability, this kind of thermo-optical switch could have a great value in applications.
Authors and Affiliations
Hairun Guo, Fufei Pang, Bo Qi
Keywords
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