Demonstration of UV-written waveguides, Bragg gratings and cavities at 780 nm, and an original experimental measurement of group delay

TL;DR

This paper demonstrates UV-written waveguides and Bragg gratings at 780 nm, and introduces a novel method for measuring the group delay of these gratings using a Fabry-Perot cavity.

Contribution

It presents the first implementation of UV-written waveguides and gratings at 780 nm and a new practical technique for group delay measurement.

Findings

Successful fabrication of UV-written waveguides and gratings at 780 nm

Development of a novel group delay measurement method

Experimental validation of the technique

Abstract

We present direct UV-written waveguides and Bragg gratings operating at 780 nm. By combining two gratings into a Fabry-Perot cavity we have devised and implemented a novel and practical method of measuring the group delay of Bragg gratings.