Enhanced Raman Spectra in Femtosecond Laser Inscribed Yb:YVO4 Channel Waveguides

Abstract

The femtosecond laser writing with double-line technique was employed to fabricate buried channel waveguides with different widths in Yb:YVO4 crystal. Model profiles of the waveguides were captured using the endface coupling setup at the wavelength of 633 nm under TE and TM polarization. Furthermore, the confocal micro-Raman spectra in bulk and waveguide areas were studied at the wavelength of 633 nm. The enhanced Raman intensity were performed in waveguide areas.

Femtosecond laser micromachining optical waveguides on transparent silica xerogels

“…These features allow silica xerogel to be applied in drug delivery systems [4,5], sensors [6], and waveguides [7,8]. At the same time, femtosecond laser microfabrication has been established as a versatile and efficient technique for fabricating three-dimensional microstructures in transparent materials, such as glasses [9][10][11], crystals [12,13], polymers [14][15][16], etc. In this approach, the nonlinear optical interaction limits the light's energy transfer to the material focal volume [17].…”