AUTHOR=Bao Yi-Fei , Liu Tao , Kong Wei-Jin , Luo Hao-Qi , Liu Yong , Liu Fei-Ran , Cheng Lin TITLE=Enhanced Raman Spectra in Femtosecond Laser Inscribed Yb:YVO4 Channel Waveguides JOURNAL=Frontiers in Physics VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2021.758071 DOI=10.3389/fphy.2021.758071 ISSN=2296-424X 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.