Effects of rare-earth doping on femtosecond laser waveguide writing in zinc polyphosphate glass

Abstract

Absorption measurements on silver bromide crystals and fibers in the infrared J. Appl. Phys. 113, 043111 (2013) Continuous wave ultraviolet-laser sintering of ZnO and TiO2 nanoparticle thin films at low laser powers J. Appl. Phys. 113, 044310 (2013) Controlling laser emission by selecting crystal orientation Appl. Phys. Lett. 102, 011137 (2013) Impact of wavelength dependent thermo-elastic laser ablation mechanism on the generation of nanoparticles from thin gold films Appl. Phys. Lett. 101, 263107 (2012) Apparatus to measure adsorption of condensable solvents on technical surfaces by photothermal deflection Rev. Sci. Instrum. 83, 114905 (2012) Additional information on J. Appl. Phys. We have investigated waveguide writing in Er-Yb doped zinc polyphosphate glass using a femtosecond laser with a repetition rate of 1 KHz. We find that fabrication of good waveguides requires a glass composition with an O/P ratio of 3.25. The dependence on laser writing parameters including laser fluence, focusing conditions, and scan speed is reported. Waveguide properties together with absorption and emission data indicate that these glasses can be used for the fabrication of compact, high gain amplifying devices. V C 2012 American Institute of Physics.[http://dx

Comparative study of zinc addition effect on thermal properties of silicate and phosphate glasses

“…5). For the glass 30Zn41P, there is no evidence of crystallization of KMg(PO 3 ) 3 and CaMgP 2 O 7 compounds, but apart from the formation of K 2 ZnP 2 O 7 , the appearance of magnesium-rich metaphosphate of Mg 2 P 4 O 12 type was detected.…”

“…The XRD study of the base glass with phosphate matrix (0Zn41P) (Table 3) showed that the crystallization products of the glass are polyphosphate compounds composed of KMg(PO 3 ) 3 and CaMgP 2 O 7 . The type of the formed phosphate networks conforms to the structural classification of phosphate glasses based on the O/P ratio [37].…”

“…Zinc phosphate glasses have been developed for use as LED light sources [1,2] and as substrates for optical waveguides written by f-sec lasers [3][4][5][6]. Zinc phosphate glasses also tend to have greater coefficients of thermal expansion with low processing temperatures, which makes them useful as sealing glasses [7,8].…”

Femtosecond-laser writing of photonic structures in zinc phosphate glasses

“…After fs-laser modification the modified regions were tested for optical guiding and characterized with confocal fluorescence (FL) and Raman spectroscopy. Detailed descriptions about the experimental procedures can be found elsewhere [1][2][3][4].…”

“…Phosphate glasses, which are of interest as host materials for active devices since they allow incorporation of high concentrations of rare earth ions, typically produce negative refractive index changes in the laser-exposed regions. We have recently found that good quality waveguides can be fabricated in zinc polyphosphate glass compositions with an O/P ratio close to 3.25 [1][2][3][4]. This paper summarizes the effects of glass composition on fs-laser induced structural modification as well as the fabrication of active devices in zinc phosphate glasses.…”