Work

Laser written waveguides to the sample edge

Year: 2026

Type: article

Abstract: A method is presented for the fabrication of femtosecond laser written waveguides in glass to remove the need for polishing substrates after processing. It is shown that by amplitude masking the fabrication laser beam near the sample edge and increasing the pulse energy, it is possible to write waveguides that are not affected by edge aberrations and display mode profiles well matched to single mode fiber. Results are presented for different depths in fused silica and borosilicate glass substrates. The transmission from fiber to photonic circuit is significantly improved for situations where it is not possible to polish glass substrates after laser writing, creating new opportunities in photonic packaging.

Source: Optics Letters

DOI: 10.1364/ol.590085

Authors: Zhi Kai Pong, Mohan Wang, Ji Qin, Martin J. Booth, Patrick S. Salter

Language: English

Topic: Laser Material Processing Techniques

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Funders: Advanced Research and Invention Agency, Engineering and Physical Sciences Research Council

Awards: Programmable volume photonics, G2081181577, Multiscale multidimensional integrated imaging for precision laser processing (M2I2)

OpenAlex ID: W7131208893

FWCI: 6.263

Cites: 20

Cited by: 2

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