Investigation of the modification intensity and distribution in silica glass via ultrafast laser direct writing

Yunxia Ye , Shenshen Dong , Yang Liu

Applied Optics +

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August 12, 2025

View abstract on PubMed

Summary

Ultrafast laser processing of silica glass shows that higher pulse energy density increases modification intensity. Burst modes also affect internal modification distribution, crucial for material properties.

Area Of Science

Materials Science
Laser Physics
Optical Engineering

Background

Ultrafast laser processing of silica glass is vital for modifying optical, mechanical, and chemical properties.
Existing research lacks detailed understanding of how laser parameters influence modification intensity and distribution.

Purpose Of The Study

To quantitatively investigate the effects of pulse energy density and burst modes on silica glass modification.
To establish the relationship between laser parameters and the intensity/distribution of modifications.

Main Methods

Utilized Raman spectroscopy for detection.
Employed simulation techniques for analysis.
Investigated varying pulse energy densities and burst modes.

Main Results

Increased pulse energy density led to approximately 14% higher modification intensity at the groove bottom compared to the surface.
At 314 J/cm² with two bursts, internal modification intensity decreased by ~62% along the modification line.
Modification intensity and distribution were found to be dependent on pulse energy density and burst number.

Conclusions

Enhanced ability to predict intensity and morphology in ultrafast laser-modified silica glass.
Provides theoretical guidance for fabricating silica glass components with controlled modifications.