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.

中文翻译：

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飞秒激光刻制 Yb:YVO4 通道波导中的增强拉曼光谱

采用双线飞秒激光写入技术，在Yb:YVO ₄晶体中制备了不同宽度的埋入式沟道波导。使用端面耦合设置在 TE 和 TM 偏振下在 633 nm 波长处捕获波导的模型轮廓。此外，在 633 nm 波长下研究了体和波导区域的共焦微拉曼光谱。在波导区域进行增强的拉曼强度。