Work

High-speed femtosecond UV laser writing of low-loss waveguides in fused silica

Year: 2025

Type: article

Abstract: We demonstrate ultra-low-loss femtosecond laser-written waveguides in fused silica using 450 fs ultraviolet pulses from a frequency-tripled ytterbium laser. This favorable regime only appears at a low pulse density, enabling a two orders of magnitude faster processing speed compared to the current practice with sub-200 fs IR pulses. The refractive index contrast is comparable to the values reported for infrared-written waveguides, and the propagation losses, below 0.1 dB/cm, are to date among the lowest values reported for fused silica.

Source: Optics Letters

DOI: 10.1364/ol.557978

Authors: Lisa Ackermann, Benedikt Hermann, Daniel Talán Echarri, Ernesto Gribaudo, Yves Bellouard

Language: English

Topic: Laser Material Processing Techniques

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W4408181386

FWCI: 3.597

Cites: 25

Cited by: 8

Related to: 10