Abstract
A fs-laser focused within a transparent glass can locally modify its material properties. Optical waveguides are directly written through refractive index changes [1], while fs-laser assisted chemical etching produces high-contrast, free-form, 3D structures [2]. The outcome depends sensitively on a combination of pulse parameters (e.g. peak field strength, energy) and cumulative effects (e.g. thermal), and would benefit from a fast closed-loop control. Since phase change/stress is expected to be reflected in the MIR absorption bands, dual-comb spectroscopy is a prime candidate, because it is inherently fast [3], phase sensitive, and broadband.
© 2023 IEEE
PDF ArticleMore Like This
Peter Chang, Nazanin Hoghooghi, Stephanie Swartz, Daniel Lesko, Ragib Ishrak, Scott Egbert, Jens Biegert, Rohith Reddy, Gregory Rieker, and Scott Diddams
SM3O.2 CLEO: Science and Innovations (CLEO:S&I) 2023
Nazanin Hoghooghi, Peter Chang, Scott Egbert, Matt Burch, Patrick Lynch, Scott Diddams, and Gregory B. Rieker
JTh3A.5 Applied Industrial Spectroscopy (AIS) 2023
Zhengchao Yuan, Xinyu Fan, Bingxin Xu, and Zuyuan He
W3.2 Optical Fiber Sensors (OFS) 2023