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3D laser-written silica glass step-index high-contrast waveguides for the 3.5 μm mid-infrared range

AuthorsMartínez-Salazar, Javier ; Ródenas, A.; Fernández, T.; Vázquez de Aldana, Javier R.; Thomson, Robert R.; Aguiló, Magdalena; Kar, A.K.; Solís Céspedes, Javier ; Diaz, Francesc
KeywordsJavier Martínez, Airán Ródenas, Toney Fernandez, Javier R. Vázquez de Aldana, Robert R. Thomson, Magdalena Aguiló, Ajoy K. Kar, Javier Solis, and Francesc Díaz
Issue Date11-Dec-2015
PublisherOptical Society of America
CitationOptics Letters 40: 5818- 5821 (2015)
AbstractWe report on the direct laser fabrication of step-index waveguides in fused silica substrates for operation in the 3.5 μm mid-infrared wavelength range. We demonstrate corecladding index contrasts of 0.7% at 3.39 μm and propagation losses of 1.3 (6.5) dB/cm at 3.39 (3.68) μm, close to the intrinsic losses of the glass. We also report on the existence of three different laser modified SiO glass volumes, their different micro-Raman spectra, and their different temperaturedependent populations of color centers, tentatively clarifying the SiO lattice changes that are related to the large index changes. © 2015 Optical Society of America
Description4 págs.; 6 figs.; OCIS codes: (130.2755) Glass waveguides; (140.3390) Laser materials processing; (220.4000) Microstructure fabrication.
Publisher version (URL)http://dx.doi.org/10.1364/OL.40.005818
Identifiersdoi: 10.1364/OL.40.005818
issn: 1539-4794
Appears in Collections:(CFMAC-IO) Artículos
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