Miyamoto Naoyuki, Ito Yusuke, Wei Chaoran, Yoshizaki Reina, Shibata Akihiro, Nagasawa Ikuo, Nagato Keisuke, Sugita Naohiko
Opt Lett. 2020 Jun 1;45(11):3171-3174. doi: 10.1364/OL.394952.
The internal modification of glass using ultrashort pulse lasers has been attracting attention in a wide range of applications. However, the remarkably low processing speed has impeded its use in the industry. In this study, we achieved ultrafast internal modification of glass by coaxially focusing a single-pulse femtosecond laser and continuous-wave (CW) laser with the wavelength that is transparent to the glass. Compared with the conventional method, the processing speed increased by a factor of 500. The observation of high-speed phenomena revealed that the CW laser was absorbed by the seed electrons that were generated by the femtosecond laser pulse. This technique may help expand the applications of femtosecond lasers in the industry.
利用超短脉冲激光对玻璃进行内部改性在广泛的应用领域中一直备受关注。然而，极低的加工速度阻碍了其在工业中的应用。在本研究中，我们通过将单脉冲飞秒激光和连续波（CW）激光同轴聚焦，且该连续波激光的波长对玻璃是透明的，实现了玻璃的超快内部改性。与传统方法相比，加工速度提高了500倍。对高速现象的观察表明，连续波激光被飞秒激光脉冲产生的种子电子所吸收。该技术可能有助于扩大飞秒激光在工业中的应用。
