Ion migration assisted inscription of high refractive index contrast waveguides by femtosecond laser pulses in phosphate glass

In this Letter, we report on the successful fabrication of low loss, high refractive index contrast waveguides via ion migration upon femtosecond laser writing in phosphate glass. Waveguides were produced in two different phosphate glass compositions with high and low La(2)O(3) content. In the La-ri...

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Bibliographic Details
Published in:Optics letters 2013-12, Vol.38 (24), p.5248-5251
Main Authors: Toney Fernandez, T, Haro-González, P, Sotillo, B, Hernandez, M, Jaque, D, Fernandez, P, Domingo, C, Siegel, J, Solis, J
Format: Article
Language:English
Subjects:
Femtosecond
Glass
Lasers
Migration
Phosphate glass
Refractive index
Refractivity
Waveguides
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Summary:In this Letter, we report on the successful fabrication of low loss, high refractive index contrast waveguides via ion migration upon femtosecond laser writing in phosphate glass. Waveguides were produced in two different phosphate glass compositions with high and low La(2)O(3) content. In the La-rich glass, a large refractive index increase in the guiding region was observed due to the incoming migration of La accompanied by the out-diffusion of K. The much smaller refractive index change in the La-less glass is caused by rearrangements of the glass structure. These results confirm the feasibility of adapting the glass composition for enabling the laser writing of high refractive index contrast structures via spatially selective modification of the glass composition.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.38.005248