# Femtosecond laser inscription of Bragg grating waveguides in bulk diamond

## TL;DR

This paper demonstrates femtosecond laser inscription of Bragg grating waveguides in bulk diamond, enabling integrated photonic devices with reflection capabilities for telecommunications.

## Contribution

It introduces a novel femtosecond laser fabrication method for creating Bragg gratings in diamond, advancing 3D photonic integration in this material.

## Key findings

- Successful fabrication of Bragg grating waveguides in diamond
- Operation in the telecommunications wavelength band
- Potential for complex 3D photonic networks in diamond

## Abstract

Femtosecond laser writing is applied to form Bragg grating waveguides in the diamond bulk. Type II waveguides are integrated with a single pulse point-by-point periodic laser modification positioned towards the edge of the waveguide core. These photonic devices, operating in the telecommunications band, allow for simultaneous optical waveguiding and narrowband reflection from a 4th order grating. This fabrication technology opens the way towards advanced 3D photonic networks in diamond for a range of applications.

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Source: https://tomesphere.com/paper/1705.10285